CN103615225A - Double-horizontal-well isothermal difference forced steam circulation preheating method for middle-deep layer oil reservoir - Google Patents
Double-horizontal-well isothermal difference forced steam circulation preheating method for middle-deep layer oil reservoir Download PDFInfo
- Publication number
- CN103615225A CN103615225A CN201310625525.XA CN201310625525A CN103615225A CN 103615225 A CN103615225 A CN 103615225A CN 201310625525 A CN201310625525 A CN 201310625525A CN 103615225 A CN103615225 A CN 103615225A
- Authority
- CN
- China
- Prior art keywords
- well
- horizontal well
- oil reservoir
- horizontal
- steam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Earth Drilling (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a medium-deep reservoir double-horizontal-well isothermal difference forced steam circulation preheating method, which comprises the following steps: step A: selecting a qualified oil reservoir; and B: deploying double horizontal wells in the qualified reservoir; and C: carrying out steam huff and puff development on the upper horizontal well and the lower horizontal well simultaneously to reduce the pressure of the qualified oil reservoir to be below 3.5 MPa; step D: an upper horizontal well steam injection pipe column and an upper horizontal well mechanical lifting pipe column are arranged in an upper horizontal well of the double horizontal wells, and a lower horizontal well steam injection pipe column and a lower horizontal well mechanical lifting pipe column are arranged in a lower horizontal well of the double horizontal wells; step E: and circularly preheating, simultaneously and continuously injecting and extracting the upper horizontal well and the lower horizontal well, simultaneously injecting steam into the upper horizontal well and the lower horizontal well, simultaneously lifting and extracting condensate by using a machine, extracting the condensate in the upper horizontal well from the upper horizontal well, and extracting the condensate in the lower horizontal well from the lower horizontal well.
Description
Technical field
The present invention relates to oil and note the field of adopting, be specifically related to the temperature difference such as the two horizontal wells of a kind of mid-deep strata oil reservoir and force vapor recycle pre-heating mean, be i.e. a kind of two horizontal well SAGD(SAGD of super dense oil reservoir in middle and deep layer oil reservoir that realize) efficient, balanced preheating starting method.
Background technology
SAGD (SAGD) is the effective technology means of exploitation heavy crude reservoir, for there is no the high viscosity oil of fluid ability under the initial condition of stratum, need experience oil reservoir warm-up phase, realize the thermal communication between injection-production well, fully preheating oil reservoir is the prerequisite that realizes gravity drainage.
For setting up two horizontal well combination S AGD and note, adopt thermal communication between well, generally take mode, i.e. steam soak preheating and the vapor recycle preheating of two kinds of preheatings.
Wherein steam soak preheating is that upper and lower horizontal well carries out steam soak exploitation simultaneously, object is to reduce strata pressure, sets up thermal communication, and the warm-up phase of handling up finally can make horizontal well interwell communication temperature reach 80 ℃, pressure drop is to 3MPa left and right, and stage recovery percent of reserves can reach 21%.But steam soak preheating can not homogeneous heating horizontal segment, increase along with the round of handling up, temperature field is inheritance development, non-homogeneous degree is more serious, so, rely on high pressure to handle up completely to produce to reach and obtain thermal communication object, tend to cause horizontal segment heating inhomogeneous, will restrict and proceed to the rear production effect of SAGD exploitation, reduce ultimate recovery.
Cyclic preheat refers to that high-temperature steam heats oil reservoir in the situation that not entering oil reservoir (or minute quantity enters oil reservoir), and the steam circle that only circulates in horizontal well, therefore claim cyclic preheat.In injection-production well, carry out the long enough time theoretically, after the vapor recycle of (2-4 month), between injection-production well, can set up thermal communication, and horizontal segment can obtaining homogeneous heating.But in practical application, only at Shallow Heavy Oil Reservoir, realized the self-loopa preheating of steam, for mid-deep strata heavy crude reservoir (600-1000m), because steam soak pressure is lower compared with shallow-layer, for example, developed oil reservoir and be depressurized to 3-4MPa at steam soak, at mid-deep strata heavy crude reservoir, high-temperature-hot-water is difficult to realize self-loopa, the cyclic preheat of mid-deep strata heavy crude reservoir is difficult to realize, and has limited the exploitation of mid-deep strata heavy crude reservoir.
Summary of the invention
The invention provides the temperature difference such as the two horizontal wells of a kind of mid-deep strata oil reservoir and force vapor recycle pre-heating mean, with the cyclic preheat problem for mid-deep strata heavy crude reservoir, the cyclic preheat that mainly solves mid-deep strata heavy crude reservoir is difficult to the problem realizing.
The temperature difference such as for this reason, the present invention proposes the temperature difference such as the two horizontal wells of a kind of mid-deep strata oil reservoir and forces vapor recycle pre-heating mean, the two horizontal wells of described mid-deep strata oil reservoir force vapor recycle pre-heating mean to comprise:
Steps A: select qualified oil reservoir, the geologic parameter of described qualified oil reservoir meets the following conditions: reservoir buried depth is 600-1000m, core intersection is more than or equal to 10m continuously, and vertical permeability and horizontal permeability ratio are greater than 0.3;
Step B: two horizontal wells are set in described qualified oil reservoir, and described pair of horizontal well comprises: the upper horizontal well that well spacing is 4-6m and lower horizontal well, the well depth of two horizontal wells is less than 1600 meters, and the horizontal section length of two levels is more than 300m;
Step C: upper horizontal well and lower horizontal well are carried out to steam soak exploitation simultaneously, described qualified oil reservoir is depressurized to below 3.5MPa;
Step D: then, in the upper horizontal well of described pair of horizontal well, be lowered to horizontal well steam injection tubing string and upper horizontal well machinery lifting tubing string, dark 2/3 place to upper horizontal well horizontal segment under upper horizontal well steam injection tubing string, in the lower horizontal well of described pair of horizontal well, be lowered to lower horizontal well steam injection tubing string and lower horizontal well machinery lifting tubing string, the dark tiptoe place to lower horizontal well horizontal segment under lower horizontal well steam injection tubing string;
Step e: cyclic preheat then, upper horizontal well and lower horizontal well carry out continuous injection extraction simultaneously, steam is injected in upper horizontal well and lower horizontal well simultaneously, utilize mechanical lift back production condensate liquid simultaneously, condensate liquid in upper horizontal well is by upper horizontal well extraction, and the condensate liquid of lower horizontal well is by lower horizontal well extraction.
Further, the temperature difference such as two horizontal wells of mid-deep strata oil reservoir forces vapor recycle pre-heating mean also to comprise: step F: after cyclic preheat 2-4 month, transfer SAGD exploitation to, steam injection well steam injection, producing well step-down is produced, wherein, upper horizontal well is steam injection well, and lower horizontal well is producing well.
Further, in step C, upper horizontal well and lower horizontal well carry out steam soak exploitation simultaneously makes oil reservoir be depressurized to 3 to 3.5MPa.
Further, the super viscous crude fluid behaviour in the oil reservoir block of described qualified oil reservoir is: under reservoir temperature, degassed crude viscosity is greater than 50000mPas, and relative density is greater than 0.98g/cm3.
Further, step F specifically comprises: treat that the temperature between steam injection well and producing well is greater than 90 ℃, when 80% above regional temperature of the horizontal segment of steam injection well and the horizontal segment of producing well reaches 150 ℃, proceed to SAGD exploitation, or steam injection well continuous steam injection, horizontal well is produced continuously.
Further, described steps A is specially steps A 1: select qualified oil reservoir, the geologic parameter of described qualified oil reservoir meets the following conditions: reservoir buried depth is 995m, and degassed crude viscosity is 53450～72340mPa.s at 50 ℃, and core intersection equals 15m continuously;
Described step B is specially step B1: two paired two horizontal wells are set in described qualified oil reservoir, and every pair of described pair of horizontal well comprises: the upper horizontal well that well spacing is 5m and lower horizontal well;
Described step e is specially step e 1: work steam injection speed is 110t/d, and well head mass dryness fraction is 95%, individual well steam injection 10000t,
Described step F is specially step F 1: cyclic preheat 4 months, production-injection ratio is between 0.8 to 1.2.
Further, described step D also comprises step D1: described upper horizontal well is as monitor well, and horizontal well is lowered to optical fiber temperature measurement system on described.
Further, by mechanical lift forced circulation, steam does not encourage and enters oil reservoir, and heat transfer type be take heat conduction as main, only depends on the heat transfer by heat conduction mode that the temperature difference of steam and formation temperature causes to heat stratum; Produced Liquid is the condensed water of the cooling rear formation of steam of injection, and production-injection ratio remains on 1.0.
Further, described steps A is specially steps A 2: select qualified oil reservoir, the geologic parameter of described qualified oil reservoir meets the following conditions: 680 meters of reservoir buried depths, and degassed crude viscosity is 147500～485400mPa.s at 50 ℃, core intersection is 80 meters continuously.
Upper horizontal well machinery lifting tubing string is arranged on the inclination section of described upper horizontal well, and lower horizontal well machinery lifting tubing string is arranged on the inclination section of described lower horizontal well.
The cyclic preheat mode traditional with respect to mid-deep strata oil reservoir, the present invention had been lowered to mechanical lift tubing string before cyclic preheat in two horizontal wells, with in the process of cyclic preheat, the mechanical lift that can pass through mechanical lift tubing string is by high-temperature-hot-water lifting back production, force vapor recycle, the temperature difference homogeneous heating that the oil reservoir such as reaches, like this, has just overcome traditional cyclic preheat mode and at mid-deep strata oil reservoir, has been difficult to realize the shortcoming of cyclic preheat.
Accompanying drawing explanation
Fig. 1 forces the operating principle schematic diagram of vapor recycle pre-heating mean according to temperature difference such as the two horizontal wells of the mid-deep strata oil reservoir of the embodiment of the present invention;
Fig. 2 is that horizontal well steam injection, oil recovery and temperature, pressure Real-Time Monitoring three pipes of the embodiment of the present invention are with the structural representation of the main apparent direction of pit shaft oil production technology equipment;
Fig. 3 is that horizontal well steam injection, oil recovery and temperature, pressure Real-Time Monitoring three pipes of embodiments of the invention are with the sectional structure schematic diagram of the main apparent direction of the head valve system of pit shaft oil production technology equipment;
Fig. 4 is that horizontal well steam injection, oil recovery and temperature, pressure Real-Time Monitoring three pipes of the vertical section that is arranged in protective casing of embodiments of the invention are with the horizontal direction cross-sectional view of pit shaft oil production technology equipment;
Fig. 5 is that horizontal well steam injection, oil recovery and temperature, pressure Real-Time Monitoring three pipes of the horizontal segment that is arranged in protective casing of embodiments of the invention are with the vertical direction cross-sectional view of pit shaft oil production technology equipment;
Fig. 6 is that horizontal well steam injection, oil recovery and temperature, pressure Real-Time Monitoring three pipes of embodiments of the invention are with the sectional structure schematic diagram (side-looking direction) of the integral joint tubing hanger of the head valve system of pit shaft oil production technology equipment.
Drawing reference numeral explanation:
1, upper horizontal well 10, horizontal segment 13, inclination section 15, upper horizontal well machinery lifting tubing string
17, upper horizontal well steam injection tubing string
3, lower horizontal well 30, horizontal segment 33, inclination section 35, lower horizontal well machinery lifting tubing string
17, lower horizontal well steam injection tubing string
101 protective casing 102 steam injection tubing string 103 mechanical lift tubing strings, 104 oil well pumps, 105 ends sieve horizontal segment 109 integral joint tubing 110 coiled tubing 202 steam inlets of vertical section 108 steam injection tubing strings of the screen pipe hanger 107 steam injection tubing strings of 106 horizontal wells, 203 casing annulus accesss, 204 polished rods, 205 polished rod sealers, 206 rubber gates, 207 Remote Hydraulic blowout preventers, the heat insulation inner tube of thick flange seal main body 304 oil-well tubing collar 305 instlated tubular 306 insulation layer 307 of 208 integral joint tubing hanger 209
The specific embodiment
For technical characterictic of the present invention, object and effect being had more clearly, understand, now contrast accompanying drawing explanation the specific embodiment of the present invention.
The temperature difference such as shown in Figure 1, the present invention proposes the temperature difference such as the two horizontal wells of a kind of mid-deep strata oil reservoir and forces vapor recycle pre-heating mean, the two horizontal wells of described mid-deep strata oil reservoir force vapor recycle pre-heating mean to comprise:
Steps A: select qualified oil reservoir, confirm to implement feasibility of the present invention according to known reservoir geology parameter and super viscous crude fluid behaviour; The geologic parameter of qualified oil reservoir of the present invention meets the following conditions: reservoir buried depth is that 600-1000m is mid-deep strata oil reservoir, core intersection is more than or equal to 10m continuously, vertical permeability and horizontal permeability ratio are greater than 0.3, the present invention is directed to reservoir buried depth is the mid-deep strata oil reservoir of 600-1000m, the preheating of shallow oil reservoir is without process of the present invention, and too dark oil reservoir needs more complicated technology and equipment;
Step B: two horizontal wells are set in described qualified oil reservoir, described pair of horizontal well comprises: the upper horizontal well 1 that well spacing is 4-6m and lower horizontal well 3, the well depth of two horizontal wells is less than 1600 meters, each horizontal section length of two horizontal wells is more than 300m, and the cyclic preheat that the setting of two horizontal wells and the parameters of two horizontal wells are postorder provides assurance;
Step C: upper level 1 well and lower horizontal well 3 are carried out to steam soak exploitation simultaneously, described qualified oil reservoir is depressurized to below 3.5MPa, for follow-up cyclic preheat is prepared pressure and temperature condition, for example, by the tubing string being lowered to for steam soak exploitation, carry out steam soak exploitation, after qualified oil reservoir is depressurized to below 3.5MPa, then the tubing string for steam soak exploitation is enhanced;
Step D: after qualified oil reservoir is depressurized to below 3.5MPa, in the upper horizontal well 1 of described pair of horizontal well, be lowered to horizontal well steam injection tubing string 17 and upper horizontal well machinery lifting tubing string 15,17 times dark 2/3 places to upper horizontal well horizontal segment 10 of upper horizontal well steam injection tubing string, the end of the upper horizontal well horizontal segment 10 of distance is 1/3 of upper horizontal well horizontal segment 10 length, in the lower horizontal well 3 of described pair of horizontal well, be lowered to lower horizontal well steam injection tubing string 37 and lower horizontal well machinery lifting tubing string 35,37 times dark tiptoe places to lower horizontal well horizontal segment 30 of lower horizontal well steam injection tubing string; Upper horizontal well machinery lifting tubing string 15 is arranged on inclination section 13 or the heel place of described upper horizontal well, and lower horizontal well machinery lifting tubing string 35 is arranged on inclination section 33 or the heel place of described lower horizontal well; The setting of above-mentioned parameter, considers the thermal communication of realizing between horizontal well, and the pre-heat effect of the pre-heat effect of the horizontal segment integral body of upper horizontal well and the horizontal segment integral body of lower horizontal well, guarantees that the condensate liquid of each horizontal well is able to forced circulation;
Step e: then carry out cyclic preheat, upper horizontal well and lower horizontal well carry out continuous injection extraction simultaneously, steam is injected in upper horizontal well and lower horizontal well simultaneously, utilizes mechanical lift back production condensate liquid simultaneously, high-temperature steam from well head to down-hole after, be condensed into condensate liquid, condensate liquid in upper horizontal well is by upper horizontal well extraction, and the condensate liquid of lower horizontal well is by lower horizontal well extraction, and steam enters to have back again in well, form complete cycle, reached the object of mid-deep strata oil reservoir cyclic preheat.
By two horizontal wells being set and mechanical lift tubing string being set in two horizontal wells, and select each suitable technological parameter, can realize the pressure vapor recycle of two horizontal wells of mid-deep strata oil reservoir, the temperature difference homogeneous heatings such as realization, make the fully preheating reach thermal communication condition of oil reservoir between two horizontal wells.
Further, the temperature difference such as the two horizontal wells of mid-deep strata oil reservoir force vapor recycle pre-heating mean also to comprise: step F: after cyclic preheat 2-4 month, transfer SAGD exploitation to, by steam injection well steam injection, producing well step-down is produced, wherein, upper horizontal well is steam injection well, and lower horizontal well is producing well, allows reservoir fluid enter into producing well, adopt mechanical lift to produce continuously, realize gravity drainage exploitation.
Further, in step C, upper horizontal well and lower horizontal well carry out steam soak exploitation simultaneously makes oil reservoir be depressurized to 3 to 3.5MPa.Because Pressure Drop obtains the too low lifting that is also unfavorable for high temperature water or condensate liquid.
Further, the super viscous crude fluid behaviour in the oil reservoir block of described qualified oil reservoir is: under reservoir temperature, degassed crude viscosity is greater than 50000mPas, and relative density is greater than 0.98g/cm3.These parameters are applicable to lifting of the present invention and warm.
Further, step F specifically comprises: treat that the reservoir temperature between steam injection well and producing well is greater than 90 ℃, when 80% above regional temperature of the horizontal segment of steam injection well and the horizontal segment of producing well reaches 150 ℃, like this, the fully preheating reach thermal communication condition of oil reservoir between injection-production well, then proceed to SAGD exploitation, i.e. steam injection well continuous steam injection, horizontal well is produced continuously.
Further, described steps A is specially steps A 1: select qualified oil reservoir, the geologic parameter of described qualified oil reservoir meets the following conditions: reservoir buried depth is 995m, and degassed crude viscosity is that the continuous core intersection of 53450～72340mPa.s equals 15m at 50 ℃;
Described step B is specially step B1: two paired two horizontal wells are set in described qualified oil reservoir, and every pair of described pair of horizontal well comprises: the upper horizontal well that well spacing is 5m and lower horizontal well, like this, can increase efficiency and output;
Described step e is specially step e 1: work steam injection speed is 110t/d, and well head mass dryness fraction is 95%, individual well steam injection 10000t, and these parameters are conducive to the fully preheating reach thermal communication condition of oil reservoir between injection-production well.
Described step F is specially step F 1: cyclic preheat 4 months, can realize abundant preheating, and production-injection ratio is between 0.8 to 1.2, and to realize continuous circulation, as better selection, production-injection ratio is 1, and recycle ratio is more satisfactory.
Further, described step D also comprises step D1: described upper horizontal well is as monitor well, horizontal well is lowered to optical fiber temperature measurement system on described, for detection of downhole temperature, by upper horizontal well optical fiber temperature-measurement monitoring materials, show, after lower horizontal well steam injection, horizontal segment temperature raises gradually, thermal communication well section is longer, shows to be progressively communicated with between two mouthfuls of wells.
For example, upper horizontal well is during as monitor well, the present invention adopts horizontal well steam injection, oil recovery and temperature, pressure Real-Time Monitoring three pipes of an embodiment below with pit shaft oil production technology equipment, to be lowered to steam injection tubing string 102, mechanical lift tubing string 103 and coiled tubing simultaneously, in coiled tubing, be provided with optical fiber temperature measurement system, for example comprise capillary tube and organize thermocouple more, to realize in same pit shaft, the organic assembling of steam injection, lifting, thermometric, in same pit shaft, can realize above-mentioned three functions.
As Fig. 2, described three pipes comprise with pit shaft oil production technology equipment: head valve system, steam injection tubing string 102, mechanical lift tubing string 103 and integral joint tubing 109.
Head valve system, as Fig. 3, is arranged on well head place or the ground of the pit shaft of horizontal well, and link technique sleeve pipe 101;
Steam injection tubing string 102, mechanical lift tubing string 103 and integral joint tubing 109, be separately positioned in protective casing 101, as Fig. 4 and Fig. 5, steam injection tubing string 102, mechanical lift tubing string 103 and integral joint tubing 109 do not comprise mutually, in other words steam injection tubing string 102, mechanical lift tubing string 103 and integral joint tubing 109 these threes do not have socket relation, these three tubing strings or ducted any be all arranged on outside other two;
Described integral joint tubing 109 comprises: the vertical section of interconnective integral joint tubing and the horizontal segment of integral joint tubing; The vertical section of described integral joint tubing is arranged in the vertical section of described protective casing, the horizontal segment of described integral joint tubing is arranged in the horizontal segment of described protective casing, the end of described integral joint tubing post is positioned at the venthole front portion of described steam injection tubing string, for the protection of temperature and pressure monitoring coiled tubing;
As Fig. 4 and Fig. 5, described coiled tubing 110, be arranged in described integral joint tubing 109, in described coiled tubing, be provided with capillary tube and organize thermocouple more, described coiled tubing comprises: the vertical section of interconnective coiled tubing and the horizontal segment of coiled tubing, the vertical section of described coiled tubing is arranged in the vertical section of described integral joint tubing, the vertical section horizontal segment of described coiled tubing is arranged in the horizontal segment of described integral joint tubing, the end of described coiled tubing and integral joint tubing end are substantially suitable, for filling capillary pressure measuring and thermocouple temperature measurement; Described capillary tube test pressure should be less than 15MPa, and described many group thermocouple assay temperature should be less than 450 ℃, and adopt heat-resisting protective material filling between described coiled tubing;
Described steam injection tubing string 102 comprises: the vertical section 107 of interconnective steam injection tubing string and the horizontal segment 108 of steam injection tubing string, the vertical section of described steam injection tubing string is arranged in the vertical section of described protective casing, the horizontal segment of described steam injection tubing string is arranged in the horizontal segment of described protective casing, and the end of described steam injection tubing string is realized crude oil development and oil reservoir preheating to horizontal well pit shaft steam injection; As shown in Figure 4 and Figure 5, steam injection string comprises from outside to inside: heat insulation outer tube 305, insulation layer 306 and heat insulation inner tube 307, and insulation layer 306 is folded between heat insulation outer tube 305 and heat insulation inner tube 307;
Described mechanical lift tubing string 103 is arranged in the vertical section of described protective casing, for the liquid in lifting pit shaft (crude oil); As Fig. 5, mechanical lift tubing string 103 comprises the oil pick-up tube coupling together by oil-well tubing collar 304;
As Fig. 6, described head valve system comprises: thick flange seal main body 209, integral joint tubing hanger 208, oil pick-up tube outlet 201 and steam inlet 202(are as Fig. 3), steam inlet 202 is arranged in thick flange seal main body 209.
Described integral joint tubing 109 and coiled tubing 110 are suspended on described integral joint tubing hanger 208, and described mechanical lift tubing string 103 connects described oil pick-up tube outlet 201, and described steam injection tubing string 102 connects described steam inlet 202.As Fig. 6, integral joint tubing hanger 208 is arranged in thick flange seal main body 209, in integral joint tubing hanger 208, has receiving system, and the signal receiving in coiled tubing 110 is converted to temperature and pressure data.In addition, as Fig. 3, described head valve system also comprises: casing annulus access 203, polished rod 204, polished rod sealer 205, rubber gate 206, Remote Hydraulic blowout preventer 207.
The present invention is except be provided with in pit shaft three tubing strings or pipeline simultaneously, and at well head place, the present invention and existing well jaws equipment have obvious difference.One of them main distinction is: the present invention is at well head place, in head valve system, be provided with the parts that connect or hang three tubing strings or pipeline simultaneously, mechanical lift tubing string connects described oil pick-up tube outlet 201, steam injection tubing string 102 connects described steam inlet 202, and integral joint tubing 109 and coiled tubing 110 are suspended on described integral joint tubing hanger 208.Also can say, steam injection tubing string and mechanical lift tubing string are all directly suspended in thick flange seal main body 209, for the original boll-weevil hanger of well head, this point is identical with prior art, but in addition, the present invention has also hung integral joint tubing hanger 208 in thick flange seal main body 209, for fixing and being connected coiled tubing 110.
In order to guarantee can to connect or hang three tubing strings or pipeline in the confined space of head valve system simultaneously, the present invention in thick flange seal main body 209 except offering steam inlet 202, also reserved space for the setting of integral joint tubing hanger 208, make the two or do not affect, non-interference, integral joint tubing hanger 208 is arranged on the side direction of steam inlet 202, and from Fig. 3, integral joint tubing hanger 208 is arranged on the rear of steam inlet 202.
The present invention has realized with the steam injection in pit shaft, oil recovery, monitoring, steam injection, oil recovery, monitoring can be carried out in same pit shaft simultaneously, and prior art is only for handling up exploitation steam injection and the monitoring carried out, need to after steam injection finishes, proposes steam injection and just can carry out oil producing operation with monitoring tubing string, after being lowered to flow string.
Further, as Fig. 2, described three pipes also comprise with pit shaft oil production technology equipment: oil well pump 104, is connected to the lower bottom of described mechanical lift tubing string 103, for extracting the crude oil adulterating in the steam condensate (SC) of horizontal well and steam condensate (SC).The piston of described oil well pump adopts sucker rod on-off connector to be connected with sucker rod.Described oil well pump depth of setting L meets:
L≥H-100(P-1)
Wherein, H is oil reservoir vertical depth, and P is strata pressure.
Further, as Fig. 2, described three pipes also comprise with pit shaft oil production technology equipment: the screen pipe hanger 106 of horizontal well, be arranged in described protective casing, in the screen casing that hangs horizontal well horizontal segment, end sieve 105 is positioned at the end of screen casing, for the horizontal segment steam injection to described protective casing.
Further, as Fig. 5, described steam injection tubing string maximum outside diameter, mechanical lift tubing string and integral joint tubing maximum outside diameter sum than the internal diameter of the vertical section of described protective casing to 10mm when young, to guarantee that three tubing strings or pipeline can be arranged in protective casing.Further, the internal diameter >=220mm of the vertical component of described protective casing, to guarantee that three tubing strings or pipeline can be arranged in protective casing.
Further, the internal diameter of described integral joint tubing should at least be greater than 40mm, and the internal diameter of described coiled tubing should at least be less than 38mm, so that integral joint tubing holds coiled tubing.
Further, internal diameter >=the 220mm of the vertical component of described protective casing, maximum outside diameter >=the 70mm of described mechanical lift tubing string, like this, can reduce the outside dimension of mechanical lift tubing string, increase the space of other two tubing strings or pipeline, further, the maximum outside diameter of described oil well pump body and oil well pump box cupling all≤92mm, to obtain rational allocation of space.Internal diameter >=the 62mm of described mechanical lift tubing string, to guarantee lifting efficiency.Further, the internal diameter >=40mm of described steam injection tubing string, to guarantee steam injection quality.
Further, the maximum outside diameter sum of the external diameter of the box cupling of described steam injection tubing string and integral joint tubing than the internal diameter of the horizontal segment of described protective casing to 10mm when young, so that steam injection tubing string can be arranged in the horizontal segment of protective casing.
As preferably selecting, the internal diameter >=40mm of described steam injection tubing string 102, external diameter≤89mm; The external diameter of the box cupling of described steam injection tubing string 102 than the internal diameter of the horizontal segment of described protective casing to 10mm when young, preferably, the external diameter >=108mm of the box cupling of described steam injection tubing string, described box cupling adopts two-way chamfering to connect.
Preferably, the external diameter >=70mm of described mechanical lift tubing string 103, internal diameter >=62mm; The maximum outside diameter sum of the maximum outside diameter of described steam injection tubing string 102 and mechanical lift pipe 103 posts is than the internal diameter of the vertical component of described protective casing 101 to 10mm when young, and the box cupling of mechanical lift tubing string 103 is approximately 89mm.
Further, by mechanical lift forced circulation, steam does not encourage and enters oil reservoir, and heat transfer type be take heat conduction as main, only depends on the heat transfer by heat conduction mode that the temperature difference of steam and stratum (or oil reservoir) temperature causes to heat stratum; Produced Liquid is the condensed water of the cooling rear formation of steam of injection, and production-injection ratio remains on 1.0.
Further, described steps A is specially steps A 2: select qualified oil reservoir, the geologic parameter of described qualified oil reservoir meets the following conditions: 680 meters of reservoir buried depths, and degassed crude viscosity is 147500～485400mPa.s at 50 ℃, core intersection is 80 meters continuously.
Several instantiations of more detailed description below:
Example 1: a sandstone group oil reservoir of certain oil reservoir, be sandstone group oil reservoir, 955 meters of buried depths, degassed crude viscosity is 53450～72340mPa.s at 50 ℃, core intersection is 15 meters, in straight well steam soak latter stage, 2 paired parallel horizontal wells well groups of oil reservoir intra-zone administration, comprise 2 mouthfuls of horizontal steam injection wells, 2 mouthfuls of horizontal production well, 1 mouthful of flat well of observing of horizontal saliva, the basic keeping parallelism of horizontal well direction and structural line, upper and lower horizontal well spacing is 5 meters.For geologic feature and the oil property of this oil reservoir, carried out the right cyclic preheat test of two Horizontal Wells.
Oil reservoir average thickness is greater than 15 meters, degree of porosity, and permeability, vertical permeability and horizontal direction permeability ratio are greater than 0.3, are applicable to the exploitation of SAGD technology;
Undeveloped reserves, hole pattern is two horizontal well groups, 5 meters of upper and lower horizontal well spacing;
In upper and lower horizontal well pit shaft, be lowered to respectively steam injection string, lifting tubing string and lifting equipment, at upper horizontal well, be lowered to optical fiber temperature measurement system, level monitoring section variations in temperature simultaneously;
In steam injection string, inject wet saturated steam, utilize lifting equipment back production, force vapor recycle, steam injection speed is 110t/d, and well head mass dryness fraction is 95%, individual well steam injection 10000t, and cyclic preheat 4 months, production-injection ratio is 1.0.
Upper horizontal well optical fiber temperature-measurement monitoring materials demonstration, after lower horizontal well steam injection, upper horizontal well horizontal segment temperature raises gradually, and thermal communication well section 260m, accounts for 58% of aggregate level section, shows to be progressively communicated with between two mouthfuls of wells.
Example 2: certain Guantao, oil field group oil reservoir is super dense oil reservoir in middle and deep layer oil reservoir, 680 meters of buried depths, degassed crude viscosity is 147500～485400mPa.s at 50 ℃, core intersection is 80 meters.Before the present invention, this oil reservoir adopts two horizontal well combinations, and its production course is divided into two stages of preheating of handling up and handle up, and in the stage of handling up, lower horizontal well is handled up the surrounding phase, after upper horizontal well is gone into operation, and the well group preheating two cycles of handling up.Cycle oil production and gas oil ratio are all declining, and recovery percent of reserves is 18%.
For geologic feature and the oil property of this oil reservoir, the invention process the cyclic preheat of upper and lower horizontal well.
(1) oil reservoir average thickness is greater than 15 meters, degree of porosity, and permeability, vertical permeability and horizontal direction permeability ratio are greater than 0.3, are applicable to the exploitation of SAGD technology;
(2) developed oil reservoir, hole pattern is two horizontal well combinations, 4 meters of upper and lower horizontal well spacing;
(3) in upper and lower horizontal well pit shaft, be all lowered to steam injection string, lifting tubing string and lifting equipment;
(4) in steam injection string, inject wet saturated steam, utilize lifting equipment back production, force vapor recycle, work steam injection speed is 110t/d, and well head mass dryness fraction is 95%, individual well steam injection 10000t, and cyclic preheat 4 months, production-injection ratio is 1.0.
This well group such as passes through at the temperature difference cyclic preheat to be made not reach 2/3 horizontal segment of evenly employing and is evenly employed, and all horizontal segment temperature all reach 150 ℃.And proceed to after SAGD exploitation, obtained good effect.Upper horizontal well metaideophone, 180 tons of day steam injections, lower horizontal well adopts Φ 120mm pump opening well and making production, well group day 184 tons of production fluids, 40.3 tons of day produce oils, moisture 78.2%, instantaneous gas oil ratio 0.19, instantaneous production-injection ratio 0.87.43164 tons of SAGD stage steam injections, 48858 tons of stage production fluids, 7042 tons of stage produce oils, stage gas oil ratio 0.16, stage production-injection ratio 1.13, average day produce oil 32.8t/d, surpasses the preheating daily average oil production of front handling up.
The present invention can solve the problem of employing inequality, pipeline start up by preheating difficulty that super dense oil reservoir in middle and deep layer reservoir horizontal well causes because of reservoir, to improving the utilization ratio of SAGD initial stage horizontal segment, plays important promotion with the produce oil speed of accelerating SAGD.
The foregoing is only the schematic specific embodiment of the present invention, not in order to limit scope of the present invention.For each ingredient of the present invention can mutually combine under the condition of not conflicting, any those skilled in the art, not departing from equivalent variations and the modification of having done under the prerequisite of design of the present invention and principle, all should belong to the scope of protection of the invention.
Claims (10)
1. the temperature difference such as two horizontal wells of mid-deep strata oil reservoir is forced a vapor recycle pre-heating mean, it is characterized in that, the temperature difference such as the two horizontal wells of described mid-deep strata oil reservoir force vapor recycle pre-heating mean to comprise:
Steps A: select qualified oil reservoir, the geologic parameter of described qualified oil reservoir meets the following conditions: reservoir buried depth is 600-1000m, core intersection is more than or equal to 10m continuously, and vertical permeability and horizontal permeability ratio are greater than 0.3;
Step B: two horizontal wells are set in described qualified oil reservoir, and described pair of horizontal well comprises: the upper horizontal well that well spacing is 4-6m and lower horizontal well, the well depth of two horizontal wells is less than 1600 meters, and the horizontal section length of two levels is more than 300m;
Step C: upper horizontal well and lower horizontal well are carried out to steam soak exploitation simultaneously, described qualified oil reservoir is depressurized to below 3.5MPa;
Step D: then, in the upper horizontal well of described pair of horizontal well, be lowered to horizontal well steam injection tubing string and upper horizontal well machinery lifting tubing string, dark 2/3 place to upper horizontal well horizontal segment under upper horizontal well steam injection tubing string, in the lower horizontal well of described pair of horizontal well, be lowered to lower horizontal well steam injection tubing string and lower horizontal well machinery lifting tubing string, the dark tiptoe place to lower horizontal well horizontal segment under lower horizontal well steam injection tubing string;
Step e: cyclic preheat then, upper horizontal well and lower horizontal well carry out continuous injection extraction simultaneously, steam is injected in upper horizontal well and lower horizontal well simultaneously, utilize mechanical lift back production condensate liquid simultaneously, condensate liquid in upper horizontal well is by upper horizontal well extraction, and the condensate liquid of lower horizontal well is by lower horizontal well extraction.
2. the temperature difference such as two horizontal wells of mid-deep strata oil reservoir as claimed in claim 1 is forced vapor recycle pre-heating mean, it is characterized in that, the temperature difference such as the two horizontal wells of mid-deep strata oil reservoir force vapor recycle pre-heating mean also to comprise: step F: at cyclic preheat after 2 to 4 months, transfer SAGD exploitation to, steam injection well steam injection, producing well step-down is produced, wherein, upper horizontal well is steam injection well, and lower horizontal well is producing well.
3. the temperature difference such as two horizontal wells of mid-deep strata oil reservoir as claimed in claim 1 is forced vapor recycle pre-heating mean, it is characterized in that, in step C, upper horizontal well and lower horizontal well carry out steam soak exploitation simultaneously makes oil reservoir be depressurized to 3 to 3.5MPa.
4. the temperature difference such as two horizontal wells of mid-deep strata oil reservoir as claimed in claim 1 is forced vapor recycle pre-heating mean, it is characterized in that, super viscous crude fluid behaviour in the oil reservoir block of described qualified oil reservoir is: under reservoir temperature, degassed crude viscosity is greater than 50000mPas, and relative density is greater than 0.98g/cm3.
5. the temperature difference such as two horizontal wells of mid-deep strata oil reservoir as claimed in claim 2 is forced vapor recycle pre-heating mean, it is characterized in that, step F specifically comprises: treat that the temperature between steam injection well and producing well is greater than 90 ℃, when 80% above regional temperature of the horizontal segment of steam injection well and the horizontal segment of producing well reaches 150 ℃, proceed to SAGD exploitation.
6. the temperature difference such as two horizontal wells of mid-deep strata oil reservoir as claimed in claim 2 is forced vapor recycle pre-heating mean, it is characterized in that,
Described steps A is specially steps A 1: select qualified oil reservoir, the geologic parameter of described qualified oil reservoir meets the following conditions: reservoir buried depth is 995m, and degassed crude viscosity is 53450～72340mPa.s at 50 ℃, and core intersection equals 15m continuously;
Described step B is specially step B1: two paired two horizontal wells are set in described qualified oil reservoir, and every pair of described pair of horizontal well comprises: the upper horizontal well that well spacing is 5m and lower horizontal well;
Described step e is specially step e 1: work steam injection speed is 110t/d, and well head mass dryness fraction is 95%, individual well steam injection 10000t,
Described step F is specially step F 1: cyclic preheat 4 months, production-injection ratio is between 0.8 to 1.2.
7. the temperature difference such as two horizontal wells of mid-deep strata oil reservoir as claimed in claim 1 is forced vapor recycle pre-heating mean, it is characterized in that, described step D also comprises step D1: described upper horizontal well is as monitor well, and horizontal well is lowered to optical fiber temperature measurement system on described.
8. the temperature difference such as two horizontal wells of mid-deep strata oil reservoir as claimed in claim 1 is forced vapor recycle pre-heating mean, it is characterized in that,
By mechanical lift forced circulation, steam does not encourage and enters oil reservoir, and heat transfer type be take heat conduction as main, only depends on the heat transfer by heat conduction mode that the temperature difference of steam and formation temperature causes to heat stratum; Produced Liquid is the condensed water of the cooling rear formation of steam of injection, and production-injection ratio remains on 1.0.
9. the temperature difference such as two horizontal wells of mid-deep strata oil reservoir as claimed in claim 1 is forced vapor recycle pre-heating mean, it is characterized in that,
Described steps A is specially steps A 2: select qualified oil reservoir, the geologic parameter of described qualified oil reservoir meets the following conditions: 680 meters of reservoir buried depths, and degassed crude viscosity is 147500～485400mPa.s at 50 ℃, core intersection is 80 meters continuously.
10. the temperature difference such as two horizontal wells of mid-deep strata oil reservoir as claimed in claim 1 is forced vapor recycle pre-heating mean, it is characterized in that, upper horizontal well machinery lifting tubing string is arranged on the inclination section of described upper horizontal well, and lower horizontal well machinery lifting tubing string is arranged on the inclination section of described lower horizontal well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310625525.XA CN103615225B (en) | 2013-11-28 | 2013-11-28 | Double-horizontal-well isothermal difference forced steam circulation preheating method for middle-deep layer oil reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310625525.XA CN103615225B (en) | 2013-11-28 | 2013-11-28 | Double-horizontal-well isothermal difference forced steam circulation preheating method for middle-deep layer oil reservoir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103615225A true CN103615225A (en) | 2014-03-05 |
| CN103615225B CN103615225B (en) | 2017-07-07 |
Family
ID=50165939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310625525.XA Active CN103615225B (en) | 2013-11-28 | 2013-11-28 | Double-horizontal-well isothermal difference forced steam circulation preheating method for middle-deep layer oil reservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103615225B (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500012A (en) * | 2014-11-24 | 2015-04-08 | 中国石油天然气股份有限公司 | SAGD starting method for interlayer heterogeneous heavy oil reservoir |
| WO2015077954A1 (en) * | 2013-11-28 | 2015-06-04 | 中国石油天然气股份有限公司 | Method for isothermal differential forced steam cyclic pre-heating for twin horizontal wells of mid-depth layer of oil reservoir |
| CN104989353A (en) * | 2015-07-16 | 2015-10-21 | 国勘石油技术有限公司 | Oil production method for SAGD dual horizontal wells |
| CN105298446A (en) * | 2014-12-28 | 2016-02-03 | 新疆科力新技术发展有限公司 | Shallow-layer oil sand in-situ exploitation process applying equipment |
| CN105587302A (en) * | 2014-11-06 | 2016-05-18 | 中国石油天然气股份有限公司 | Manifold and process for connecting oil well by fracturing oil layer by using manifold |
| CN105756641A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | Judgment method for double-horizontal-well SAGD circulating preheating communication |
| CN105756642A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | SAGD double horizontal well group |
| CN105756643A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | SAGD horizontal well system and starting method thereof |
| CN105756625A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | Oil production method of double horizontal wells |
| CN105986794A (en) * | 2015-03-05 | 2016-10-05 | 中国石油天然气股份有限公司 | Oil extraction method of SAGD (steam assisted gravity drainage) double horizontal well and tubular column equipment thereof |
| CN106368660A (en) * | 2015-07-20 | 2017-02-01 | 中国石油天然气股份有限公司 | Method for extracting petroleum |
| CN106368661A (en) * | 2015-07-20 | 2017-02-01 | 中国石油天然气股份有限公司 | Method for measuring time point for transferring steam huff and puff into steam flooding |
| CN106761558A (en) * | 2016-12-20 | 2017-05-31 | 中国石油天然气股份有限公司 | Electric heating auxiliary double-horizontal-well circulating preheating pipe column structure and oil layer heating method thereof |
| CN105756644B (en) * | 2014-12-17 | 2018-09-04 | 中国石油天然气股份有限公司 | Preheating method before oil extraction of double horizontal wells and oil extraction method of double horizontal wells |
| CN109138976A (en) * | 2018-07-23 | 2019-01-04 | 中国石油天然气股份有限公司 | Method for judging time for converting double-horizontal-well preheating into SAGD (steam assisted gravity drainage) and double-horizontal-well preheating device |
| CN110965995A (en) * | 2019-10-31 | 2020-04-07 | 中国石油天然气股份有限公司 | Oil-water distribution testing device and method for low-liquid-volume horizontal well |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090250215A1 (en) * | 2008-04-02 | 2009-10-08 | Petroleo Brasileiro S.A. - Petrobras | Method for induced production of petroleum by means of horizontal fractures |
| CN201843600U (en) * | 2010-11-16 | 2011-05-25 | 中国石油天然气股份有限公司 | SAGD mechanical lifting circulating preheating equipment |
| CN102900415A (en) * | 2012-09-25 | 2013-01-30 | 中国石油天然气股份有限公司 | Deep and ultra-deep heavy oil reservoir double-horizontal well fire flooding oil drainage exploitation method |
| CN103174403A (en) * | 2013-03-08 | 2013-06-26 | 中国石油天然气股份有限公司 | Gravity and steam flooding combined mining method for thick-layer interlayer-containing common heavy oil reservoir |
-
2013
- 2013-11-28 CN CN201310625525.XA patent/CN103615225B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090250215A1 (en) * | 2008-04-02 | 2009-10-08 | Petroleo Brasileiro S.A. - Petrobras | Method for induced production of petroleum by means of horizontal fractures |
| CN201843600U (en) * | 2010-11-16 | 2011-05-25 | 中国石油天然气股份有限公司 | SAGD mechanical lifting circulating preheating equipment |
| CN102900415A (en) * | 2012-09-25 | 2013-01-30 | 中国石油天然气股份有限公司 | Deep and ultra-deep heavy oil reservoir double-horizontal well fire flooding oil drainage exploitation method |
| CN103174403A (en) * | 2013-03-08 | 2013-06-26 | 中国石油天然气股份有限公司 | Gravity and steam flooding combined mining method for thick-layer interlayer-containing common heavy oil reservoir |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015077954A1 (en) * | 2013-11-28 | 2015-06-04 | 中国石油天然气股份有限公司 | Method for isothermal differential forced steam cyclic pre-heating for twin horizontal wells of mid-depth layer of oil reservoir |
| CN105587302A (en) * | 2014-11-06 | 2016-05-18 | 中国石油天然气股份有限公司 | Manifold and process for connecting oil well by fracturing oil layer by using manifold |
| CN105587302B (en) * | 2014-11-06 | 2018-12-25 | 中国石油天然气股份有限公司 | Manifold and process for connecting oil well by fracturing oil layer by using manifold |
| CN104500012A (en) * | 2014-11-24 | 2015-04-08 | 中国石油天然气股份有限公司 | SAGD starting method for interlayer heterogeneous heavy oil reservoir |
| CN105756625A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | Oil production method of double horizontal wells |
| CN105756644B (en) * | 2014-12-17 | 2018-09-04 | 中国石油天然气股份有限公司 | Preheating method before oil extraction of double horizontal wells and oil extraction method of double horizontal wells |
| CN105756642A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | SAGD double horizontal well group |
| CN105756643A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | SAGD horizontal well system and starting method thereof |
| CN105756643B (en) * | 2014-12-17 | 2019-10-11 | 中国石油天然气股份有限公司 | SAGD horizontal well system and starting method thereof |
| CN105756641A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | Judgment method for double-horizontal-well SAGD circulating preheating communication |
| CN105298446A (en) * | 2014-12-28 | 2016-02-03 | 新疆科力新技术发展有限公司 | Shallow-layer oil sand in-situ exploitation process applying equipment |
| CN105986794A (en) * | 2015-03-05 | 2016-10-05 | 中国石油天然气股份有限公司 | Oil extraction method of SAGD (steam assisted gravity drainage) double horizontal well and tubular column equipment thereof |
| CN104989353A (en) * | 2015-07-16 | 2015-10-21 | 国勘石油技术有限公司 | Oil production method for SAGD dual horizontal wells |
| CN106368661A (en) * | 2015-07-20 | 2017-02-01 | 中国石油天然气股份有限公司 | Method for measuring time point for transferring steam huff and puff into steam flooding |
| CN106368660A (en) * | 2015-07-20 | 2017-02-01 | 中国石油天然气股份有限公司 | Method for extracting petroleum |
| CN106761558A (en) * | 2016-12-20 | 2017-05-31 | 中国石油天然气股份有限公司 | Electric heating auxiliary double-horizontal-well circulating preheating pipe column structure and oil layer heating method thereof |
| CN109138976A (en) * | 2018-07-23 | 2019-01-04 | 中国石油天然气股份有限公司 | Method for judging time for converting double-horizontal-well preheating into SAGD (steam assisted gravity drainage) and double-horizontal-well preheating device |
| CN109138976B (en) * | 2018-07-23 | 2022-01-04 | 中国石油天然气股份有限公司 | Method for judging time for converting double-horizontal-well preheating into SAGD (steam assisted gravity drainage) and double-horizontal-well preheating device |
| CN110965995A (en) * | 2019-10-31 | 2020-04-07 | 中国石油天然气股份有限公司 | Oil-water distribution testing device and method for low-liquid-volume horizontal well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103615225B (en) | 2017-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103615225B (en) | Double-horizontal-well isothermal difference forced steam circulation preheating method for middle-deep layer oil reservoir | |
| CN106948795B (en) | A method for developing hydrothermal geothermal energy in a closed circulation of multi-branched horizontal wells | |
| CA2931882C (en) | Method for forced steam cycle preheating dual horizontal well in middle-deep layer reservoir under a constant temperature difference | |
| CN103615224B (en) | Method for exploiting heavy oil reservoir by improving steam assisted gravity drainage through solvent and well pattern structure | |
| CN105625993B (en) | Hot dry rock multi-cycle heating system and its production method | |
| WO2016082188A1 (en) | Hot dry rock multi-cycle heating system and production method therefor | |
| CN104514535B (en) | Same-well injection-production thermal oil production pipe column for vertical well and oil production method thereof | |
| RU2436943C1 (en) | Procedure for extraction of high viscous oil from deviating hole by method of steam cyclic pumping into reservoir | |
| CN104265242B (en) | The ground thermal extraction method of geothermal well | |
| CA2692678A1 (en) | Heated fluid injection using multilateral wells | |
| CN103615199A (en) | Three-pipe same-well-barrel oil extraction process equipment for steam injection, oil extraction and temperature and pressure real-time monitoring of horizontal well | |
| CN204252967U (en) | Hot dry rock multi cycle heating system | |
| CN102678096A (en) | Method for exploiting high-pour-point oil reservoir through hot water assisted gravity drainage | |
| CN106014357B (en) | A kind of method of oil shale thick deposit original position heat injection separate zone production oil gas | |
| CN108708700A (en) | Method for improving application effect of SAGD technology in heterogeneous reservoir | |
| CN107191143A (en) | Lower filling well device and production practice are adopted in one kind | |
| CN106761558A (en) | Electric heating auxiliary double-horizontal-well circulating preheating pipe column structure and oil layer heating method thereof | |
| CN106194135A (en) | Circulating preheating method and device in double-horizontal-well steam-assisted gravity oil drainage process | |
| CN108868719B (en) | Method for producing crude oil in SAGD wedge-shaped area | |
| RU103845U1 (en) | DEVICE FOR DEVELOPING DEPOSITS OF HIGH-VISCOUS OIL OR BITUMEN | |
| CN204371132U (en) | SAGD double-horizontal-well circulating preheating pipe column | |
| CN203685053U (en) | Three-pipe same-well-barrel oil extraction process equipment for steam injection, oil extraction and temperature and pressure real-time monitoring of horizontal well | |
| CN207686693U (en) | Oil production pipe and thickened oil exploitation device | |
| CN109138976B (en) | Method for judging time for converting double-horizontal-well preheating into SAGD (steam assisted gravity drainage) and double-horizontal-well preheating device | |
| CN205638401U (en) | Double-horizontal-well steam-assisted gravity oil drainage three-pipe steam injection pipe column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yang Liqiang Inventor after: Yang Jianping Inventor after: Liang Jianyu Inventor after: Wang Hongyuan Inventor after: Wang Shizhong Inventor after: Yan Xu Inventor after: Hou Guoru Inventor after: Wei Yao Inventor before: Yang Liqiang Inventor before: Yang Jianping Inventor before: Liang Jianyu Inventor before: Wang Hongyuan Inventor before: Yan Xu Inventor before: Hou Guoru Inventor before: Wei Yao |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |