CN102926701B - Continuous mixed type water plugging process method - Google Patents
Continuous mixed type water plugging process method Download PDFInfo
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- CN102926701B CN102926701B CN201210427051.3A CN201210427051A CN102926701B CN 102926701 B CN102926701 B CN 102926701B CN 201210427051 A CN201210427051 A CN 201210427051A CN 102926701 B CN102926701 B CN 102926701B
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Abstract
The invention discloses a continuous mixed water plugging process, which comprises the following steps: a. mixing 2-10 parts of the main body plugging agent and 100 parts of clear water to form a main body plugging agent solution, and injecting the main body plugging agent solution into the stratum; b. completely displacing the main body plugging agent solution in the shaft into the reservoir of the oil well by using clear water; c. closing the well and waiting for coagulation, reacting the main body plugging agent solution at the temperature of 30-90 ℃ for 3-24 hours to form high-viscosity elastic gel, blocking microcracks and matrix water flow channels in the reservoir, and realizing effective plugging of the water flooded oil well; d. and opening the well for pumping, and pumping and putting the oil well into production according to the pumping standard procedure of the oil field. Compared with the prior art, the method solves the technical problems that the plugging effect is poor and the effective period is short easily caused by injecting the plugging agent with large discharge in the conventional water plugging technology, and also solves the technical problems that the construction period of the existing single injection type water plugging technology is long, the manpower and equipment burden are increased, and particularly the residual liquid is treated after the construction is finished.
Description
Technical field
The present invention relates to technical field of petroleum extraction, relate to a kind of oil well water and oil control storey increase design technique specifically, particularly a kind of mixed matching water-plugging technology method continuously.
Background technology
In LOW PERMEABILITY OILFIELD DEVELOPMENT process, due to long-term Advance Water Injection exploitation and the impact by formation fracture (natural microcrack and artificial fracturing crack), the non-homogeneity on stratum is abnormal serious, injection water is made often to ooze flow in fracture along high, and the less permeable layer involved less than oil-containing, the water filling of this poor efficiency, not only affects crude oil recovery percent of reserves, and increases the cost of oil recovery due to the consumption of the energy, the process of production fluid, the corrosion etc. of pipeline.Water layer is oozed out for shutoff is high, disclose multiple method for blocking in prior art, wherein closely with the present invention have that CN86108877A " Zirconium gel water sealing agent ", CN1464173A " are applicable to the modified tannin extract gel water-plugging technique of high temperature and high salt oil deposit ", CN1177053A " a kind of water plugging and profile controlling method that single-fluid process, two-fluid process are combined " and CN101139920A " dibasic composite horizontal well bottom water plugging technique " etc.Non-patent literature has: the development and thinking (41-47 page) etc. of the application of benzenediol in polymeric gel water-plugging technique (286-289 page) during oilfield chemistry the 14th volume the 3rd, Oilfields engineering the 8th phase net horizontal section water blockoff new technology (21-22 page) in 2003, petroleum science and technology forum the 1st phase China's Water in Water Shutoff in Oil Field profile control technique in 2004 all discloses a kind of water plugging and profile controlling agent prescription or process.
But these existing conventional water-plugging technologies are all adopt single injection technology to inject from oil well blocking agent slug, then closing well Hou Ning.On the one hand, conventional blocking agent base fluid viscosity is comparatively large, and should not enter microcrack and the matrix of low permeability reservoir, cause plugging effect not good enough, period of validity is short.On the other hand, whole process need prepares blocking agent in advance before construction, will process remaining blocking agent, long construction period after construction, increases the burden of people's force-summing device.The all unexposed report about continuous mixed matching water-plugging technology method of above-mentioned document.
Summary of the invention
For solving the problem, the present invention proposes a kind of mixed matching water-plugging technology method continuously, can realize the efficient plug water construction fast of high-water-cut oil-producing well.Present method solves huge discharge injection blocking agent existing in conventional water-plugging technique easily causes plugging effect not good enough, the technical problem that period of validity is short, also solve existing single pouring-in water-plugging technology long construction period simultaneously, increase manpower and facility load, particularly construction terminates the technical problem of rear raffinate process.
The present invention realizes by adopting following technical proposals:
A kind of mixed matching water-plugging technology method continuously, is characterized in that, comprise the steps:
A, get after main body blocking agent 2-10 part and 100 parts, clear water are mixed to form main body blocking agent solution and inject stratum, wherein 100 parts, clear water does not comprise clear water used in b step below;
B, with clear water, the whole mistake of main body blocking agent solution in pit shaft is replaced in oil reservoir;
C, closing well Hou Ning, main body blocking agent solution, under temperature 30-90 DEG C of condition, reacts and forms high viscoelastic gel after 3-24 hour, blocks the water stream channel of microcrack and matrix in reservoir, realizes the effective shutoff to water logging oil well;
D, drive a well suction, by oil field pumping criteria program, carries out suction go into operation to oil well.
The mixture that described main body blocking agent is made up of cation-modified polyacrylamide, 2-acrylamide-2-methylpro panesulfonic acid AMPS and lignosulfonates, mixing quality ratio between them is: 1%-30%:0.1%-10%:1%-10%, and the viscosity of mixture aqueous solution is less than 5mPa s.
Described cation-modified polyacrylamide is existing product, is documented in " Northeast Petroleum University ", and author is Cui Liyan, in the Master's thesis that name is called " synthesis of modified cation polyacrylamide and flocculating property research ".
In described a step, be adopt fracturing unit truck or high pressure pump truck that main body blocking agent solution is injected stratum.
In described b step, when main body blocking agent solution and clear water are compressed into oil well microcrack and matrix, infusion pressure is as the criterion be no more than formation fracture pressure 80%.
In described Step d, directly go into operation after checking water plugging effect or go into operation after taking other measures.
Compared with prior art, advantage of the present invention and beneficial effect show:
1, the present invention is by the improvement to main body blocking agent performance, rely on main body blocking agent to meet the rapidly-soluble performance of water and realize continuous mixture plug water construction and without the need to adding new equipment, by a, b, c, d tetra-steps, blocking agent is joined before solving existing single pouring-in water-plugging technology construction, the remaining blocking agent of construction post processing, long construction period, increases the technical problem of manpower and facility load.This technique is specially adapted to remote districts or the offshore oil gas well of hypotonic extra-low permeability Oil/gas Well (conventional blocking agent can not enter microcrack and matrix) or dosing operating expenses costliness, has a good application prospect.
2, the main body blocking agent temperature tolerance that the present invention adopts can reach 90 DEG C, and the Water Under phase sealing ratiod at 30-90 DEG C after the reaction of main body blocking agent can reach more than 90%.
3, the mixture that the main body blocking agent that the present invention adopts is made up of cation-modified polyacrylamide, 2-acrylamide-2-methylpro panesulfonic acid AMPS and lignosulfonates, mixing quality ratio between them is: 1%-30%:0.1%-10%:1%-10%, it is a kind of instant capacity powdery solid, there is instant low viscosity characteristics, the aqueous solution shows as low viscosity (viscosity is less than 5mPa s) at normal temperatures, can form the gel that viscosity is greater than 10000mPa s after reaction.Be conducive to microcrack and matrix that main body blocking agent solution enters low permeability reservoir like this, more effective shutoff is formed to water stream channel.
Detailed description of the invention
Embodiment 1
The invention discloses a kind of mixed matching water-plugging technology method continuously, comprise the steps:
A, get after main body blocking agent 2-10 part and 100 parts, clear water are mixed to form main body blocking agent solution and inject stratum, wherein 100 parts, clear water does not comprise clear water used in b step below;
B, with clear water, the whole mistake of main body blocking agent solution in pit shaft is replaced in oil reservoir;
C, closing well Hou Ning, main body blocking agent solution, under temperature 30-90 DEG C of condition, reacts and forms high viscoelastic gel after 3-24 hour, blocks the water stream channel of microcrack and matrix in reservoir, realizes the effective shutoff to water logging oil well;
D, drive a well suction, by oil field pumping criteria program, carries out suction go into operation to oil well.
In the present embodiment, the main body blocking agent adopted can be any instant capacity blocking agent product conventional in this area.
Embodiment 2
The invention discloses a kind of mixed matching water-plugging technology method continuously, comprise the steps:
A, get after main body blocking agent 2-10 part and 100 parts, clear water are mixed to form main body blocking agent solution and inject stratum, wherein 100 parts, clear water does not comprise clear water used in b step below;
B, with clear water, the whole mistake of main body blocking agent solution in pit shaft is replaced in oil reservoir;
C, closing well Hou Ning, main body blocking agent solution, under temperature 30-90 DEG C of condition, reacts and forms high viscoelastic gel after 3-24 hour, blocks the water stream channel of microcrack and matrix in reservoir, realizes the effective shutoff to water logging oil well;
D, drive a well suction, directly goes into operation or take other measures to increase production after checking water plugging effect.
The mixture that described main body blocking agent is made up of cation-modified polyacrylamide, 2-acrylamide-2-methylpro panesulfonic acid AMPS and lignosulfonates, mixing quality ratio between them is: 1%-30%:0.1%-10%:1%-10%, and the viscosity of mixture aqueous solution is less than 5mPa s.
Described cation-modified polyacrylamide is existing product, is documented in " Northeast Petroleum University ", and author is Cui Liyan, in the Master's thesis that name is called " synthesis of modified cation polyacrylamide and flocculating property research ".
Embodiment 3
As preferred forms of the present invention, it comprises the steps:
A, get after main body blocking agent 2-10 part and 100 parts, clear water are mixed to form main body blocking agent solution and inject stratum, wherein 100 parts, clear water does not comprise clear water used in b step below;
B, with clear water, the whole mistake of main body blocking agent solution in pit shaft is replaced in oil reservoir;
C, closing well Hou Ning, main body blocking agent solution, under temperature 30-90 DEG C of condition, reacts and forms high viscoelastic gel after 3-24 hour, blocks the water stream channel of microcrack and matrix in reservoir, realizes the effective shutoff to water logging oil well;
D, drive a well suction, directly goes into operation or take other measures to increase production after checking water plugging effect.
The mixture that described main body blocking agent is made up of cation-modified polyacrylamide, 2-acrylamide-2-methylpro panesulfonic acid AMPS and lignosulfonates, mixing quality ratio between them is: 1%-30%:0.1%-10%:1%-10%, and the viscosity of mixture aqueous solution is less than 5mPa s.
Described cation-modified polyacrylamide is existing product, is documented in " Northeast Petroleum University ", and author is Cui Liyan, in the Master's thesis that name is called " synthesis of modified cation polyacrylamide and flocculating property research ".
In described a step, be adopt fracturing unit truck or high pressure pump truck that main body blocking agent solution is injected stratum.
In described b step, when main body blocking agent solution and clear water are compressed into oil well microcrack and matrix, infusion pressure is as the criterion be no more than formation fracture pressure 80%.
Specific implementation process of the present invention:
1, according to wellfracturing operation and refracturing transformation and geologic feature data consider blocking agent shutoff efficiency, required plug agent amount is calculated.
2, according to laboratory experiment result, the optium concentration of each component of main body blocking agent is determined.
3, according to the geologic feature of shutoff reservoir, formulate concrete plug water construction scheme, mainly determine discharge capacity and maximum pressure two parameters, especially the determination of pressure should be as the criterion be no more than formation fracture pressure 80%.
4, plug water construction has been designed according to plug water construction.First by active water formation testing water suction situation during construction, determine injection discharge capacity and the ground pump pressure of plug water construction accordingly, then according to infusion scheme infusion main body blocking agent, complete the plug water construction to service shaft.
5, according to oil field pumping criteria program, suction is carried out to oil well and goes into operation, checking water plugging effect.
Claims (4)
1. a continuous mixed matching water-plugging technology method, is characterized in that, comprise the steps:
A, get after main body blocking agent 2-10 part and 100 parts, clear water are mixed to form main body blocking agent solution and inject stratum;
B, with clear water, the whole mistake of main body blocking agent solution in pit shaft is replaced in oil reservoir;
C, closing well Hou Ning, main body blocking agent solution, under temperature 30-90 DEG C of condition, reacts and forms high viscoelastic gel after 3-24 hour, blocks the water stream channel of microcrack and matrix in reservoir, realizes the effective shutoff to water logging oil well;
D, drive a well suction, by oil field pumping criteria program, carries out suction go into operation to oil well;
The mixture that described main body blocking agent is made up of cation-modified polyacrylamide, 2-acrylamide-2-methylpro panesulfonic acid AMPS and lignosulfonates, mixing quality ratio between them is: 1%-30%:0.1%-10%:1%-10%, and the viscosity of mixture aqueous solution is less than 5mPa s.
2. one according to claim 1 continuous mixed matching water-plugging technology method, is characterized in that, in described a step, is adopt fracturing unit truck or high pressure pump truck that main body blocking agent solution is injected stratum.
3. one according to claim 2 continuous mixed matching water-plugging technology method, is characterized in that, in described b step, when main body blocking agent solution and clear water are compressed into oil well microcrack and matrix, infusion pressure is as the criterion be no more than formation fracture pressure 80%.
4. one according to claim 1 continuous mixed matching water-plugging technology method, is characterized in that, in described Step d, directly goes into operation after checking water plugging effect.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103321606B (en) * | 2013-07-02 | 2016-05-04 | 中国石油集团川庆钻探工程有限公司 | Water plugging shielding method for low-permeability fractured reservoir oil well |
| CN103865503B (en) * | 2014-03-10 | 2016-08-17 | 东北石油大学 | High temperature resistant inorganic granulated gel compounds double-liquid seal blocking agent and method for blocking thereof |
| CN103865510A (en) * | 2014-03-10 | 2014-06-18 | 东北石油大学 | Thermal-recovery injection well gel single-liquid modifying and flooding agent and modifying and flooding method thereof |
| CN103865504A (en) * | 2014-03-10 | 2014-06-18 | 东北石油大学 | Gel double-solution plugging regulating agent of steam injection well for thermal recovery and plugging regulating method using gel double-solution plugging regulating agent |
| CN104121000B (en) * | 2014-07-11 | 2020-09-04 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Water plugging method for low-permeability fractured reservoir casing completion horizontal well |
| CN105201449A (en) * | 2015-10-14 | 2015-12-30 | 中国石油集团长城钻探工程有限公司 | Water plugging method for thickened oil thermal recovery horizontal well |
| CN113153215B (en) * | 2021-04-23 | 2022-11-29 | 大庆辰平钻井技术服务有限公司 | Chemical plugging method for high-water-flooded layer of deflecting section of ultra-short radius horizontal well |
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Effective date of registration: 20201028 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |
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