CN109707362A - Fixed-point fracturing method for residual oil in longitudinal single sand body of mining and submerging old well reservoir - Google Patents
Fixed-point fracturing method for residual oil in longitudinal single sand body of mining and submerging old well reservoir Download PDFInfo
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- CN109707362A CN109707362A CN201910068976.5A CN201910068976A CN109707362A CN 109707362 A CN109707362 A CN 109707362A CN 201910068976 A CN201910068976 A CN 201910068976A CN 109707362 A CN109707362 A CN 109707362A
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Abstract
The invention discloses a fixed-point fracturing method for residual oil in a longitudinal single sand body of an excavation and submergence old well reservoir, which comprises the following steps: step 1) determining the distribution position and the orientation of the residual oil of a longitudinal single sand body of an old well reservoir; step 2) establishing a stress profile model of an old well reservoir, and determining the position and the number of layers of single sand body fixed-point fracturing; step 3) simulating the fracture form, determining the fracture parameters and the fracture arrangement direction, and determining the nozzle position and the nozzle number of the directional hydraulic jet fracturing drilling tool; step 4), setting the positioning and supporting device into a well, setting, and then setting the gyroscope for positioning and orientation; step 5), a directional hydraulic jet fracturing drilling tool is put in, and the directional hydraulic jet fracturing drilling tool is butted with the positioning support device; step 6) carrying out hydraulic sand blasting perforation and fracturing operation through the directional hydraulic jet fracturing drilling tool, carrying out fixed-point fracturing on a first longitudinal single sand body of the old well reservoir, and submerging residual oil; and 7) sequentially completing the fracturing operation of the residual single sand body.
Description
Technical field
The invention belongs to petroleum production engineering fracturing technique fields, and in particular to tap the latent power old well reservoir longitudinal direction single sand body of one kind is remaining
The fixed point fracturing process of oil.
Background technique
Pressure break is low permeability reservoirs reservoir reconstruction, the important channel for realizing benefit exploitation, and temporary stall can be sealed to fracturing technique
Stifled primary fissure seam, realizes that crack turns to, forms new crack, to form complicated seam net system, increases gas well drainage area, realizes
Oil/gas well stimulation purpose.
Ordos Basin Triassic system reservoir belongs to typical " hypotonic, low pressure, low abundance " oil reservoir, in order to realize oil reservoir
Effective exploitation generallys use the modes such as water filling, fracturing reform and is exploited.By taking the long X oil reservoir of typical Ansai Oilfield as an example, go into operation
Initial stage is by water filling, well yield can be to 3t/d or more, but with the extension of mining time, oil reservoir produced journey after fracturing reform
Degree is continuously improved, and moisture content is gradually increasing, causes well yield and constantly decline.The oil reservoir is opened by nearly water filling in 30 years at present
Hair, entered in high water cut development stage, average production per well drops to 1.0t/d and repeats to change hereinafter, being therefore badly in need of carrying out old well
It makes, reservoir remaining oil of taping the latent power, improves well yield.
For old filed remaining oil of sufficiently taping the latent power, by inspection shaft data and outcrop comparative study, in conjunction with well logging point
Analysis, long X layers is further subdivided into 3~4 single sand bodies of 3~5m of thickness or so.Pass through test and Encryption Well coring result point
Analysis shows that its reservoir longitudinal direction single sand body remaining oil enrichment, part operation fracturing reform are not employed sufficiently, latent with taping the latent power
Power.
Barrier stress difference < 2MPa is stored up every interlayer agensis since single sand body thickness is thin, and on longitudinal direction, conventional pressure break changes
It makes and be easy to cause crack seam high out of control, a layer phenomenon is altered in fracturing process；Simultaneously because old filed is by water filling for many years, grease
Relationship is complicated, and conventional fracturing reform is difficult to realize determine the purpose of direction Remaining Oil, easily causes aqueous rising after pressure, influences
Repeat correctional effect.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, one kind is provided and is taped the latent power old well reservoir longitudinal direction single sand body
The fixed point fracturing process of remaining oil, overcome in the prior art 1: conventional fracturing reform be easy to cause crack seam high out of control, pressure
A layer phenomenon is altered during splitting, 2: conventional fracturing reform is difficult to realize determine the purpose of direction Remaining Oil, easily causes pressure
Aqueous rising afterwards, influence repeat correctional effect, 3: the prior art not yet about old well repeat be transformed, reservoir remaining oil of taping the latent power
The problems such as method.
In order to solve technical problem, the old well reservoir longitudinal direction single sand body remaining oil the technical scheme is that one kind is taped the latent power
Fixed point fracturing process, comprising the following steps:
Step 1) determines old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation；
Step 2 is established old well reservoir stress according to step 1) old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation and is cutd open
Surface model analyzes old well reservoir longitudinal direction single sand body pressure break feasibility, determines position and the number of plies of single sand body fixed point pressure break；
The single sand body fixed point pressure break position and the number of plies, simulation fracturing fracture form that step 3) is determined according to step 2 determine pressure break
Fracture parameters and crack lay orientation, and determine orientation hydraulic jetting fracturing drilling tool nozzle location and number of nozzle；
Step 4) tripping in device for positioning and supporting enters well, sets, then tripping in gyroscope positioning and directing；
The orientation and direction that step 5) is obtained according to step 4) adjust orientation hydraulic jetting fracturing drilling tool, and then tripping in orients waterpower
Fracture drill is sprayed, docks orientation hydraulic jetting fracturing drilling tool with device for positioning and supporting；
Step 6) carries out hydraulic jet perforation, fracturing work by orientation hydraulic jetting fracturing drilling tool, and longitudinal to old well reservoir the
One single sand body pinpoints pressure break, Remaining Oil；
After the completion of step 7) the first single sand body pressure break, orientation hydraulic jetting fracturing drilling tool is above mentioned to the second single sand body, carries out waterpower
Abrasive perforating, fracturing work, and it is sequentially completed the fracturing work of remaining single sand body.
Preferably, the determination in old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation is based on oil in the step 1)
Hiding exploitation geology dynamic analysis and pulsed neutron saturation logging method, according to analysis and monitoring result to reservoir remaining oil enrichment
Position and orientation are determined.
Preferably, it is answered over the ground in the step 2 according to old well reservoir P-wave And S data, interlayer pressure difference and heterogeneity
The influence of power calculates old well reservoir stress, establishes old well reservoir stress profile model, the old well reservoir stress profile model
Formula is as follows:
In formula:
νp、νs: P- and S-wave velocity；
Ed: kinetic Youngs modulus
Vd: dynamic Poisson's ratio
It is as follows that its medium-term and long-term note adopts rear horizontal minimum principal stress:
In formula: σh: horizontal minimum principal stress, MPa；
σv: vertical stress, MPa；
Eh: horizontal dynamic Young's modulus:
Ev: vertical kinetic Youngs modulus；
Vh: horizontal dynamic Poisson's ratio；
VV: vertical dynamic Poisson's ratio；
αh: horizontal Biot spy's coefficient of elasticity；
αv: vertical Biot spy's coefficient of elasticity；
P: reservoir pore pressure, MPa.
Preferably, according to old well reservoir stress profile model, in conjunction with old well reservoir longitudinal direction single sand body remaining oil distribution position, for
Old well reservoir longitudinal direction single sand body remaining oil difference perforating degree, perforating site, inter-laminar stress be poor, weak face thickness, uses
Fracpro PT fracture software carries out simulation calculating, position and the single sand body number of plies of fixed point pressure break is determined, when reservoir longitudinal direction substratum
Between stress difference < 2MPa, using orientation hydraulic jetting fracturing drilling tool Remaining Oil.
Preferably, according to determining single sand body fixed point pressure break position and the number of plies in the step 3), using Fracpro PT
Fracture software simulates fixed point fracturing fracture form, determines that discharge capacity, sand feeding amount, liquid measure and the crack of fixed point pressure break are laid
Orientation, and orientation is laid according to discharge capacity, sand feeding amount, liquid measure and the crack of fixed point pressure break and calculates nozzle chock pressure difference and injection speed
Degree determines orientation hydraulic jetting fracturing drilling tool nozzle location and number of nozzle.
Preferably, the concrete operation step of the step 4) are as follows: using cable carry magnetic localizer and dispenser and
Device for positioning and supporting enters well, and the placement position of device for positioning and supporting is determined according to magnetic localizer measurement casing coupling depth,
Igniting blasting magnetic localizer gunpowder, pushes the hydraulic cylinder of magnetic localizer to set slips in internal surface of sleeve pipe, and upper proposition is launched
Device；Then gyroscope is carried using cable to go into the well, the guide groove of gyroscope is docked with the orientation key on device for positioning and supporting,
The orientation key direction of measurement and positioning support device, upper portable cable act gyroscope.
Preferably, the orientation key is cuboid, and the length is 50mm, width 10mm, are highly 5mm.
Preferably, the orientation and direction obtained in the step 5) according to step 4) adjusts orientation hydraulic jetting fracturing drilling tool
In hydraulic ejector nozzle and orientation guider guide groove position, then tripping in orient hydraulic jetting fracturing drilling tool, and
Running speed is reduced at Distance positioning support device top 10m, is observed derrick pressure gauge table suspending weight, is changed according to suspending weight, and
Rotation pipeline, until the side of determining on the guide groove and device for positioning and supporting of orientation hydraulic jetting fracturing drilling tool lower part orientation guider
After position key accurately docks, derrick pressure gauge table suspending weight is reduced to 0, i.e. orientation hydraulic jetting fracturing drilling tool tripping in design position.
Preferably, the bilateral injector that the hydraulic ejector is unilateral injector or phase is 180 °, wherein bilateral sprays
The nozzle of emitter is evenly distributed in bilateral injector two sides, wherein hydraulic ejector body length 380mm, outer diameter 100mm, internal diameter
40mm, nozzle diameter 6.3mm.
Compared with the existing technology, the present invention has the advantages that
(1) for the present invention for high water-cut reservoir mid-later development phase in hyposmosis, oil reservoir entirety oil water relation is complicated, accurately to tap the latent power
Oil reservoir longitudinal direction single sand body remaining oil prevents well water after pressure from rising, utilizes the hydraulic jetting fracturing method of orientation, pressure break one
The fixed point fracturing work of body improves construction efficiency, is split according to data, realizations such as remaining oil distribution relationship, waterline test orientation
Seam fixed point crack initiation, control critical eigenvalue height, longitudinal single sand body remaining oil of taping the latent power avoid oil well water breakthrough after pressure, in old filed stripper well
It has broad application prospects in terms of improving well yield and Tapping Residual Oil；
(2) present invention has construction cost low, and site operation is simple, blocks reliable, effect outstanding feature after pressure, controllability
It is high.
Specific embodiment
The specific embodiment of the invention is described below with reference to embodiment:
It should be noted that structure, ratio, the size etc. of this specification signal, only to cooperate specification revealed interior
Hold, so that those skilled in the art understands and reads, is not intended to limit the invention enforceable qualifications, any structure
Modification, the change of proportionate relationship or the adjustment of size, do not influencing the effect of present invention can be generated and the mesh that can reach
Under, it should all still fall in the range of disclosed technology contents can cover.
Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, also
Only being illustrated convenient for narration, rather than to limit the scope of the invention, relativeness is altered or modified, in nothing
Under essence change technology contents, when being also considered as the enforceable scope of the present invention.
Device for positioning and supporting of the present invention, gyroscope, orientation hydraulic jetting fracturing drilling tool, hydraulic ejector, magnetism
Locator and dispenser are the prior art.
Reservoir development geology dynamic analysis of the present invention, pulsed neutron saturation logging method, reservoir well-log information,
Remaining oil test result, water filling waterline analysis of data, reservoir P-wave And S data, Fracpro PT fracture software are existing skill
Art.
Orientation hydraulic jetting fracturing drilling tool of the present invention includes orientation guider (included guide groove), K344-112 envelope
Every device, ball-and-seat, hydraulic ejector, hydraulic safety connector and 27/8"External upset tubing to well head, link position relationship is existing
There is link position relationship universal in technology, the present invention repeats no more.
Embodiment 1
The invention discloses a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power, comprising the following steps:
Step 1) determines old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation；
Step 2 is established old well reservoir stress according to step 1) old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation and is cutd open
Surface model analyzes old well reservoir longitudinal direction single sand body pressure break feasibility, determines position and the number of plies of single sand body fixed point pressure break；
The single sand body fixed point pressure break position and the number of plies, simulation fracturing fracture form that step 3) is determined according to step 2 determine pressure break
Fracture parameters and crack lay orientation, and determine hydraulic ejector nozzle location and number of nozzle；
Step 4) tripping in device for positioning and supporting enters well, sets, then tripping in gyroscope positioning and directing；
The orientation and direction that step 5) is obtained according to step 4) adjust orientation hydraulic jetting fracturing drilling tool, and then tripping in orients waterpower
Fracture drill is sprayed, docks orientation hydraulic jetting fracturing drilling tool with device for positioning and supporting；
Step 6) carries out hydraulic jet perforation, fracturing work by orientation hydraulic jetting fracturing drilling tool, and longitudinal to old well reservoir the
One single sand body pinpoints pressure break, Remaining Oil；
After the completion of step 7) the first single sand body pressure break, orientation hydraulic jetting fracturing drilling tool is above mentioned to the second single sand body, carries out waterpower
Abrasive perforating, fracturing work, and it is sequentially completed the fracturing work of remaining single sand body.
Embodiment 2
The invention discloses a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power, comprising the following steps:
Step 1) determines old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation；
Step 2 is established old well reservoir stress according to step 1) old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation and is cutd open
Surface model analyzes old well reservoir longitudinal direction single sand body pressure break feasibility, determines position and the number of plies of single sand body fixed point pressure break；
The single sand body fixed point pressure break position and the number of plies, simulation fracturing fracture form that step 3) is determined according to step 2 determine pressure break
Fracture parameters and crack lay orientation, and determine hydraulic ejector nozzle location and number of nozzle；
Step 4) tripping in device for positioning and supporting enters well, sets, then tripping in gyroscope positioning and directing；
The orientation and direction that step 5) is obtained according to step 4) adjust orientation hydraulic jetting fracturing drilling tool, and then tripping in orients waterpower
Fracture drill is sprayed, docks orientation hydraulic jetting fracturing drilling tool with device for positioning and supporting；
Step 6) carries out hydraulic jet perforation, fracturing work by orientation hydraulic jetting fracturing drilling tool, and longitudinal to old well reservoir the
One single sand body pinpoints pressure break, Remaining Oil；
After the completion of step 7) the first single sand body pressure break, orientation hydraulic jetting fracturing drilling tool is above mentioned to the second single sand body, carries out waterpower
Abrasive perforating, fracturing work, and it is sequentially completed the fracturing work of remaining single sand body.
Preferably, the determination in old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation is based on oil in the step 1)
Hiding exploitation geology dynamic analysis and pulsed neutron saturation logging method, according to analysis and monitoring result to reservoir remaining oil enrichment
Position and orientation are determined.
Embodiment 3
The invention discloses a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power, comprising the following steps:
Step 1) determines old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation；
Step 2 is established old well reservoir stress according to step 1) old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation and is cutd open
Surface model analyzes old well reservoir longitudinal direction single sand body pressure break feasibility, determines position and the number of plies of single sand body fixed point pressure break；
The single sand body fixed point pressure break position and the number of plies, simulation fracturing fracture form that step 3) is determined according to step 2 determine pressure break
Fracture parameters and crack lay orientation, and determine hydraulic ejector nozzle location and number of nozzle；
Step 4) tripping in device for positioning and supporting enters well, sets, then tripping in gyroscope positioning and directing；
The orientation and direction that step 5) is obtained according to step 4) adjust orientation hydraulic jetting fracturing drilling tool, and then tripping in orients waterpower
Fracture drill is sprayed, docks orientation hydraulic jetting fracturing drilling tool with device for positioning and supporting；
Step 6) carries out hydraulic jet perforation, fracturing work by orientation hydraulic jetting fracturing drilling tool, and longitudinal to old well reservoir the
One single sand body pinpoints pressure break, Remaining Oil；
After the completion of step 7) the first single sand body pressure break, orientation hydraulic jetting fracturing drilling tool is above mentioned to the second single sand body, carries out waterpower
Abrasive perforating, fracturing work, and it is sequentially completed the fracturing work of remaining single sand body.
Preferably, the determination in old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation is based on oil in the step 1)
Hiding exploitation geology dynamic analysis and pulsed neutron saturation logging method, according to analysis and monitoring result to reservoir remaining oil enrichment
Position and orientation are determined.
Preferably, it is answered over the ground in the step 2 according to old well reservoir P-wave And S data, interlayer pressure difference and heterogeneity
The influence of power calculates old well reservoir stress, establishes old well reservoir stress profile model, the old well reservoir stress profile model
Formula is as follows:
In formula:
νp、νs: P- and S-wave velocity；
Ed: kinetic Youngs modulus；
Vd: dynamic Poisson's ratio；
It is as follows that its medium-term and long-term note adopts rear horizontal minimum principal stress:
In formula:
σh: horizontal minimum principal stress, MPa；σv: vertical stress, MPa；
Eh: horizontal dynamic Young's modulus；
Ev: vertical kinetic Youngs modulus；
Vh: horizontal dynamic Poisson's ratio；
VV: vertical dynamic Poisson's ratio；
αh: horizontal Biot spy's coefficient of elasticity；
αv: vertical Biot spy's coefficient of elasticity；
P: reservoir pore pressure, MPa.
Preferably, according to old well reservoir stress profile model, in conjunction with old well reservoir longitudinal direction single sand body remaining oil distribution position,
For old well reservoir longitudinal direction single sand body remaining oil difference perforating degree, perforating site, inter-laminar stress be poor, weak face thickness, uses
Fracpro PT fracture software carries out simulation calculating, position and the single sand body number of plies of fixed point pressure break is determined, when reservoir longitudinal direction substratum
Between stress difference < 2MPa, using orientation hydraulic jetting fracturing drilling tool Remaining Oil.
Preferably, according to determining single sand body fixed point pressure break position and the number of plies in the step 3), using Fracpro PT
Fracture software simulates fixed point fracturing fracture form, determines that discharge capacity, sand feeding amount, liquid measure and the crack of fixed point pressure break are laid
Orientation, and orientation is laid according to discharge capacity, sand feeding amount, liquid measure and the crack of fixed point pressure break and calculates nozzle chock pressure difference and injection speed
Degree, determines hydraulic ejector nozzle location and number of nozzle.
The bilateral injector that the hydraulic ejector is unilateral injector or phase is 180 °, the wherein spray of bilateral injector
Mouth is evenly distributed in bilateral injector two sides, wherein hydraulic ejector body length 380mm, outer diameter 100mm, internal diameter 40mm, spray
Outspoken diameter 6.3mm.
Embodiment 4
The invention discloses a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power, comprising the following steps:
Step 1) determines old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation；
Step 2 is established old well reservoir stress according to step 1) old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation and is cutd open
Surface model analyzes old well reservoir longitudinal direction single sand body pressure break feasibility, determines position and the number of plies of single sand body fixed point pressure break；
The single sand body fixed point pressure break position and the number of plies, simulation fracturing fracture form that step 3) is determined according to step 2 determine pressure break
Fracture parameters and crack lay orientation, and determine hydraulic ejector nozzle location and number of nozzle；
Step 4) tripping in device for positioning and supporting enters well, sets, then tripping in gyroscope positioning and directing；
The orientation and direction that step 5) is obtained according to step 4) adjust orientation hydraulic jetting fracturing drilling tool, and then tripping in orients waterpower
Fracture drill is sprayed, docks orientation hydraulic jetting fracturing drilling tool with device for positioning and supporting；
Step 6) carries out hydraulic jet perforation, fracturing work by orientation hydraulic jetting fracturing drilling tool, and longitudinal to old well reservoir the
One single sand body pinpoints pressure break, Remaining Oil；
After the completion of step 7) the first single sand body pressure break, orientation hydraulic jetting fracturing drilling tool is above mentioned to the second single sand body, carries out waterpower
Abrasive perforating, fracturing work, and it is sequentially completed the fracturing work of remaining single sand body.
Preferably, the determination in old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation is based on oil in the step 1)
Hiding exploitation geology dynamic analysis and pulsed neutron saturation logging method, according to analysis and monitoring result to reservoir remaining oil enrichment
Position and orientation are determined.
Preferably, it is answered over the ground in the step 2 according to old well reservoir P-wave And S data, interlayer pressure difference and heterogeneity
The influence of power calculates old well reservoir stress, establishes old well reservoir stress profile model, the old well reservoir stress profile model
Formula is as follows:
In formula:
νp、νs: P- and S-wave velocity；
Ed: kinetic Youngs modulus；
Vd: dynamic Poisson's ratio；
It is as follows that its medium-term and long-term note adopts rear horizontal minimum principal stress:
In formula:
σh: horizontal minimum principal stress, MPa；
σv: vertical stress, MPa；
Eh: horizontal dynamic Young's modulus；
Ev: vertical kinetic Youngs modulus；
Vh: horizontal dynamic Poisson's ratio；
VV: vertical dynamic Poisson's ratio；
αh: horizontal Biot spy's coefficient of elasticity；
αv: vertical Biot spy's coefficient of elasticity；
P: reservoir pore pressure, MPa.
Preferably, according to old well reservoir stress profile model, in conjunction with old well reservoir longitudinal direction single sand body remaining oil distribution position,
For old well reservoir longitudinal direction single sand body remaining oil difference perforating degree, perforating site, inter-laminar stress be poor, weak face thickness, uses
Fracpro PT fracture software carries out simulation calculating, position and the single sand body number of plies of fixed point pressure break is determined, when reservoir longitudinal direction substratum
Between stress difference < 2MPa, using orientation hydraulic jetting fracturing drilling tool Remaining Oil.
Preferably, according to determining single sand body fixed point pressure break position and the number of plies in the step 3), using Fracpro PT
Fracture software simulates fixed point fracturing fracture form, determines that discharge capacity, sand feeding amount, liquid measure and the crack of fixed point pressure break are laid
Orientation, and orientation is laid according to discharge capacity, sand feeding amount, liquid measure and the crack of fixed point pressure break and calculates nozzle chock pressure difference and injection speed
Degree, determines hydraulic ejector nozzle location and number of nozzle.
The bilateral injector that the hydraulic ejector is unilateral injector or phase is 180 °, the wherein spray of bilateral injector
Mouth is evenly distributed in bilateral injector two sides, wherein hydraulic ejector body length 380mm, outer diameter 100mm, internal diameter 40mm, spray
Outspoken diameter 6.3mm.
Preferably, the concrete operation step of the step 4) are as follows: using cable carry magnetic localizer and dispenser and
Device for positioning and supporting enters well, and the placement position of device for positioning and supporting is determined according to magnetic localizer measurement casing coupling depth,
Igniting blasting magnetic localizer gunpowder, pushes the hydraulic cylinder of magnetic localizer to set slips in internal surface of sleeve pipe, and upper proposition is launched
Device；Then gyroscope is carried using cable to go into the well, the guide groove of gyroscope is docked with the orientation key on device for positioning and supporting,
The orientation key direction of measurement and positioning support device, upper portable cable act gyroscope.
Preferably, the orientation key is cuboid, and the length is 50mm, width 10mm, are highly 5mm.
Embodiment 5
The invention discloses a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power, comprising the following steps:
Step 1) determines old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation；
Step 2 is established old well reservoir stress according to step 1) old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation and is cutd open
Surface model analyzes old well reservoir longitudinal direction single sand body pressure break feasibility, determines position and the number of plies of single sand body fixed point pressure break；
The single sand body fixed point pressure break position and the number of plies, simulation fracturing fracture form that step 3) is determined according to step 2 determine pressure break
Fracture parameters and crack lay orientation, and determine hydraulic ejector nozzle location and number of nozzle；
Step 4) tripping in device for positioning and supporting enters well, sets, then tripping in gyroscope positioning and directing；
The orientation and direction that step 5) is obtained according to step 4) adjust orientation hydraulic jetting fracturing drilling tool, and then tripping in orients waterpower
Fracture drill is sprayed, docks orientation hydraulic jetting fracturing drilling tool with device for positioning and supporting；
Step 6) carries out hydraulic jet perforation, fracturing work by orientation hydraulic jetting fracturing drilling tool, and longitudinal to old well reservoir the
One single sand body pinpoints pressure break, Remaining Oil；
After the completion of step 7) the first single sand body pressure break, orientation hydraulic jetting fracturing drilling tool is above mentioned to the second single sand body, carries out waterpower
Abrasive perforating, fracturing work, and it is sequentially completed the fracturing work of remaining single sand body.
Preferably, the determination in old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation is based on oil in the step 1)
Hiding exploitation geology dynamic analysis and pulsed neutron saturation logging method, according to analysis and monitoring result to reservoir remaining oil enrichment
Position and orientation are determined.
Preferably, it is answered over the ground in the step 2 according to old well reservoir P-wave And S data, interlayer pressure difference and heterogeneity
The influence of power calculates old well reservoir stress, establishes old well reservoir stress profile model, the old well reservoir stress profile model
Formula is as follows:
In formula:
νp、νs: P- and S-wave velocity；
Ed: kinetic Youngs modulus；
Vd: dynamic Poisson's ratio；
It is as follows that its medium-term and long-term note adopts rear horizontal minimum principal stress:
In formula:
σh: horizontal minimum principal stress, MPa；
σv: vertical stress, MPa；
Eh: horizontal dynamic Young's modulus；
Ev: vertical kinetic Youngs modulus；
Vh: horizontal dynamic Poisson's ratio；
VV: vertical dynamic Poisson's ratio；
αh: horizontal Biot spy's coefficient of elasticity；
αv: vertical Biot spy's coefficient of elasticity；
P: reservoir pore pressure, MPa.
Reservoir pore pressure P can usually be obtained by on-the-spot test in above formula, and Rock Poisson Ratio Using and Biot spy's coefficient can
It is obtained with passing through indoor core test, therefore, integrated reservoir pressure testing results, by indoor measurement reservoir heterogeneity and respectively
Rock mechanics parameters under the influence of item is anisotropic can calculate long-term note and adopt the longitudinal crustal stress calculating mould of reservoir under influence condition
Type.
Preferably, according to old well reservoir stress profile model, in conjunction with old well reservoir longitudinal direction single sand body remaining oil distribution position,
For old well reservoir longitudinal direction single sand body remaining oil difference perforating degree, perforating site, inter-laminar stress be poor, weak face thickness, uses
Fracpro PT fracture software carries out simulation calculating, position and the single sand body number of plies of fixed point pressure break is determined, when reservoir longitudinal direction substratum
Between stress difference < 2MPa, using orientation hydraulic jetting fracturing drilling tool Remaining Oil.
Preferably, according to determining single sand body fixed point pressure break position and the number of plies in the step 3), using Fracpro PT
Fracture software simulates fixed point fracturing fracture form, determines that discharge capacity, sand feeding amount, liquid measure and the crack of fixed point pressure break are laid
Orientation, and orientation is laid according to discharge capacity, sand feeding amount, liquid measure and the crack of fixed point pressure break and calculates nozzle chock pressure difference and injection speed
Degree, determines hydraulic ejector nozzle location and number of nozzle.
The bilateral injector that the hydraulic ejector is unilateral injector or phase is 180 °, the wherein spray of bilateral injector
Mouth is evenly distributed in bilateral injector two sides, wherein hydraulic ejector body length 380mm, outer diameter 100mm, internal diameter 40mm, spray
Outspoken diameter 6.3mm can carry out single-blade crack pressure break or double-vane symmetric fracture pressure break to reservoir, according to remaining oil distribution and water breakthrough side
To hydraulic ejector meets the injection eyelet that can block side.
Preferably, the concrete operation step of the step 4) are as follows: using cable carry magnetic localizer and dispenser and
Device for positioning and supporting enters well, and the placement position of device for positioning and supporting is determined according to magnetic localizer measurement casing coupling depth,
Igniting blasting magnetic localizer gunpowder, pushes the hydraulic cylinder of magnetic localizer to set slips in internal surface of sleeve pipe, and upper proposition is launched
Device；Then gyroscope is carried using cable to go into the well, the guide groove of gyroscope is docked with the orientation key on device for positioning and supporting,
The orientation key direction of measurement and positioning support device, upper portable cable act gyroscope.
Preferably, the orientation key is cuboid, and the length is 50mm, width 10mm, are highly 5mm.
Preferably, the orientation and direction obtained in the step 5) according to step 4) adjusts orientation hydraulic jetting fracturing drilling tool
In hydraulic ejector nozzle and orientation guider guide groove position, then tripping in orient hydraulic jetting fracturing drilling tool, and
Running speed is reduced at Distance positioning support device top 10m, is observed derrick pressure gauge table suspending weight, is changed according to suspending weight, and
Rotation pipeline, until the side of determining on the guide groove and device for positioning and supporting of orientation hydraulic jetting fracturing drilling tool lower part orientation guider
After position key accurately docks, derrick pressure gauge table suspending weight is reduced to 0, i.e. orientation hydraulic jetting fracturing drilling tool tripping in design position.
Embodiment 6
Step 1) determines that old well reservoir is longitudinal single according to reservoir development geology dynamic analysis and pulsed neutron saturation logging method
Sand body remaining oil distribution position and orientation choose the long X compact oil reservoir of Ordos Basin and have carried out 2 mouthfuls of well field tests, pressure break
Preceding daily output liquid 1.41m3/ d, day oil-producing 0.6t/d, aqueous 49.6%；
Influence of the step 2 according to old well reservoir P-wave And S data, interlayer pressure difference and heterogeneity to crustal stress, which designs, establishes
Old well reservoir stress profile model (model as above) obtains reservoir longitudinally small interlayer stress difference < 2MPa, can be using orientation
Hydraulic jetting fracturing drilling tool Remaining Oil；It is surplus in conjunction with old well reservoir longitudinal direction single sand body according to old well reservoir stress profile model
Excess oil distributing position is poor, thin for old well reservoir longitudinal direction single sand body remaining oil difference perforating degree, perforating site, inter-laminar stress
Plane of weakness thickness carries out simulation calculating using Fracpro PT fracture software, determines that the position of fixed point pressure break is 40 meters of underground and list
The sand body number of plies is 4 layers；
Step 3) simulates fixed point fracturing fracture form using Fracpro PT fracture software, determines the discharge capacity of fixed point pressure break
For 4.0m3/ min, sand feeding amount 18m3, liquid measure 56m3And crack lays orientation, and according to discharge capacity, the sand feeding amount, liquid of fixed point pressure break
Amount and crack lay orientation and calculate 9 ~ 11MPa of nozzle chock pressure difference and jet velocity 2m/s, determine hydraulic ejector nozzle position
It sets side and number of nozzle is 6；
Step 4) carries magnetic localizer and dispenser followed by cable and device for positioning and supporting enters well, according to magnetic location
Device measures casing coupling depth to determine the placement position of device for positioning and supporting, and igniting blasting magnetic localizer gunpowder pushes magnetic
The hydraulic cylinder of property locator sets slips in internal surface of sleeve pipe, upper proposition dispenser；Then gyroscope is carried using cable to go into the well,
The guide groove of gyroscope is docked with the orientation key on device for positioning and supporting, the orientation key side of measurement and positioning support device
To upper portable cable acts gyroscope；
The hydraulic ejector that the orientation and direction that step 5) is obtained according to step 4) are adjusted in orientation hydraulic jetting fracturing drilling tool sprays
The position of mouth and orientation guider guide groove, then tripping in orients hydraulic jetting fracturing drilling tool, and supports and fill in Distance positioning
Reduction running speed at the 10m of top is set, derrick pressure gauge table suspending weight is observed, is changed according to suspending weight, and rotation pipeline, until orientation water
After the guide groove of power injection fracture drill lower part orientation guider is accurately docked with the orientation key on device for positioning and supporting, well
Frame pressure gauge table suspending weight is reduced to 0, i.e. orientation hydraulic jetting fracturing drilling tool tripping in design position.
Step 6) carries out hydraulic jet perforation, fracturing work by orientation hydraulic jetting fracturing drilling tool, vertical to old well reservoir
Pressure break, Remaining Oil are pinpointed to the first single sand body；
After the completion of step 7) the first single sand body pressure break, orientation hydraulic jetting fracturing drilling tool is above mentioned to the second single sand body, carries out waterpower
Abrasive perforating, fracturing work, and it is sequentially completed the fracturing work of third, the 4th single sand body.
It can must carry out Ordos Basin 2 mouthfuls of wells of long X compact oil reservoir after fixed point pressure break repeats transformation by detection to be averaged day
Produce liquid 3.1m3/ d, day oil-producing 1.62t/d, aqueous 38.7%, averagely increase day by day oily 1.02t/d, and effect of increasing production is stablized, and persistently has
Effect.Well water is compared with declining 10.9% before measure after pressure break, shows to pinpoint pressure break and has employed and original does not employ reservoir；Simultaneously to two
Cause for gossip apply well carried out pressure before, pressure after dipole sonic test, the results showed that, fixed point fracturing section before and after anisotropy difference it is obvious,
Vertical producing degree significantly improves, and demonstrates the feasibility of present invention fixed point fracturing process.
By the field test of two mouthfuls of wells, show the repetition remodeling method that longitudinal remaining oil of taping the latent power is pinpointed using this kind, it is right
The reservoir that such " more, thin, alternating layers " exploitation oil reservoir orients the enrichment of old well perforated interval top residue has good specific aim.
For the present invention for high water-cut reservoir mid-later development phase in hyposmosis, oil reservoir entirety oil water relation is complicated, digs to be accurate
Latent oil hides longitudinal single sand body remaining oil, prevents well water after pressure from rising, utilizes the hydraulic jetting fracturing method of orientation, pressure break
Integrated fixed point fracturing work improves construction efficiency, according to data such as remaining oil distribution relationship, waterline test orientation, realizes
Crack pinpoints crack initiation, control critical eigenvalue height, and longitudinal single sand body remaining oil of taping the latent power avoids oil well water breakthrough after pressure, in old filed low yield
Well has broad application prospects in terms of improving well yield and Tapping Residual Oil；The present invention has construction cost low, and scene is applied
Work is simple, blocks reliable, effect outstanding feature after pressure, and controllability is high.
The preferred embodiment for the present invention is explained in detail above, but the present invention is not limited to the above embodiments,
Those of ordinary skill in the art within the scope of knowledge, can also make various without departing from the purpose of the present invention
Variation.
Many other changes and remodeling can be made by not departing from the spirit and scope of the present invention.It should be appreciated that the present invention is not
It is limited to specific embodiment, the scope of the present invention is defined by the following claims.
Claims (9)
1. a kind of fixed point fracturing process for old well reservoir longitudinal direction single sand body remaining oil of taping the latent power, which comprises the following steps:
Step 1) determines old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation；
Step 2) is established old well reservoir stress according to step 1) old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation and is cutd open
Surface model analyzes old well reservoir longitudinal direction single sand body pressure break feasibility, determines position and the number of plies of single sand body fixed point pressure break；
The single sand body fixed point pressure break position and the number of plies, simulation fracturing fracture form that step 3) is determined according to step 2) determine pressure break
Fracture parameters and crack lay orientation, and determine orientation hydraulic jetting fracturing drilling tool nozzle location and number of nozzle；
Step 4) tripping in device for positioning and supporting enters well, sets, then tripping in gyroscope positioning and directing；
The orientation and direction that step 5) is obtained according to step 4) adjust orientation hydraulic jetting fracturing drilling tool, and then tripping in orients waterpower
Fracture drill is sprayed, docks orientation hydraulic jetting fracturing drilling tool with device for positioning and supporting；
Step 6) carries out hydraulic jet perforation, fracturing work by orientation hydraulic jetting fracturing drilling tool, and longitudinal to old well reservoir the
One single sand body pinpoints pressure break, Remaining Oil；
After the completion of step 7) the first single sand body pressure break, orientation hydraulic jetting fracturing drilling tool is above mentioned to the second single sand body, carries out waterpower
Abrasive perforating, fracturing work, and it is sequentially completed the fracturing work of remaining single sand body.
2. a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power according to claim 1, special
Sign is: the determination in old well reservoir longitudinal direction single sand body remaining oil distribution position and orientation is based on oil reservoir development in the step 1)
Matter dynamic analysis and pulsed neutron saturation logging method, according to analysis and monitoring result to reservoir remaining oil enrichment position and side
Position is determined.
3. a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power according to claim 1, special
Sign is: according to old well reservoir P-wave And S data, interlayer pressure difference and heterogeneity to the shadow of crustal stress in the step 2)
It rings, calculates old well reservoir stress, establish old well reservoir stress profile model, the formula of the old well reservoir stress profile model is such as
Under:
In formula:
νp、νs: P- and S-wave velocity；
Ed: kinetic Youngs modulus；
Vd: dynamic Poisson's ratio；
It is as follows that its medium-term and long-term note adopts rear horizontal minimum principal stress:
In formula:
σh: horizontal minimum principal stress, MPa；
σv: vertical stress, MPa；
Eh: horizontal dynamic Young's modulus；
Ev: vertical kinetic Youngs modulus；
Vh: horizontal dynamic Poisson's ratio；
VV: vertical dynamic Poisson's ratio；
αh: horizontal Biot spy's coefficient of elasticity；
αv: vertical Biot spy's coefficient of elasticity；
P: reservoir pore pressure, MPa.
4. a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power according to claim 3, special
Sign is: according to old well reservoir stress profile model, in conjunction with old well reservoir longitudinal direction single sand body remaining oil distribution position, for old well
Reservoir longitudinal direction single sand body remaining oil difference perforating degree, perforating site, inter-laminar stress be poor, weak face thickness, using Fracpro
PT fracture software carries out simulation calculating, determines position and the single sand body number of plies of fixed point pressure break, when the longitudinal small interlayer stress difference of reservoir
Value < 2MPa, using orientation hydraulic jetting fracturing drilling tool Remaining Oil.
5. a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power according to claim 1, special
Sign is: according to determining single sand body fixed point pressure break position and the number of plies in the step 3), using Fracpro PT fracture software
Fixed point fracturing fracture form is simulated, determines that discharge capacity, sand feeding amount, liquid measure and the crack of fixed point pressure break lay orientation, and
Orientation is laid according to discharge capacity, sand feeding amount, liquid measure and the crack of fixed point pressure break and calculates nozzle chock pressure difference and jet velocity, is determined
Orient hydraulic jetting fracturing drilling tool nozzle location and number of nozzle.
6. a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power according to claim 1, special
Sign is, the concrete operation step of the step 4) are as follows: carries magnetic localizer and dispenser and positioning support using cable
Device enters well, measures casing coupling depth according to magnetic localizer to determine the placement position of device for positioning and supporting, igniting blasting
Magnetic localizer gunpowder pushes the hydraulic cylinder of magnetic localizer to set slips in internal surface of sleeve pipe, upper proposition dispenser；Then it adopts
Gyroscope is carried with cable to go into the well, and the guide groove of gyroscope is docked with the orientation key on device for positioning and supporting, measurement and positioning
The orientation key direction of support device, upper portable cable act gyroscope.
7. a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power according to claim 6, special
Sign is that the orientation key is cuboid, and the length is 50mm, width 10mm, are highly 5mm.
8. a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power according to claim 1, special
Sign is: the orientation and direction obtained in the step 5) according to step 4) adjusts the waterpower in orientation hydraulic jetting fracturing drilling tool
The position of injector nozzle and orientation guider guide groove, then tripping in orients hydraulic jetting fracturing drilling tool, and fixed in distance
Running speed is reduced at the support device top 10m of position, derrick pressure gauge table suspending weight is observed, is changed according to suspending weight, and rotation pipeline,
Orientation key on to the guide groove and device for positioning and supporting of orientation hydraulic jetting fracturing drilling tool lower part orientation guider is accurate
After docking, derrick pressure gauge table suspending weight is reduced to 0, i.e. orientation hydraulic jetting fracturing drilling tool tripping in design position.
9. a kind of fixed point fracturing process of old well reservoir longitudinal direction single sand body remaining oil of taping the latent power according to claim 8, special
Sign is: the bilateral injector that the hydraulic ejector is unilateral injector or phase is 180 °, the wherein spray of bilateral injector
Mouth is evenly distributed in bilateral injector two sides, wherein hydraulic ejector body length 380mm, outer diameter 100mm, internal diameter 40mm, spray
Outspoken diameter 6.3mm.
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