CN105888604A - Method applicable to repeatedly transforming stratum nearby shaft of low-pressure gas field old well to complete permanent blocking - Google Patents
Method applicable to repeatedly transforming stratum nearby shaft of low-pressure gas field old well to complete permanent blocking Download PDFInfo
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- CN105888604A CN105888604A CN201610229259.2A CN201610229259A CN105888604A CN 105888604 A CN105888604 A CN 105888604A CN 201610229259 A CN201610229259 A CN 201610229259A CN 105888604 A CN105888604 A CN 105888604A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000000903 blocking effect Effects 0.000 title abstract 4
- 230000001131 transforming effect Effects 0.000 title abstract 3
- 239000011347 resin Substances 0.000 claims abstract description 48
- 229920005989 resin Polymers 0.000 claims abstract description 48
- 239000004568 cement Substances 0.000 claims abstract description 42
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 76
- 230000015572 biosynthetic process Effects 0.000 claims description 34
- 238000011084 recovery Methods 0.000 claims description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 12
- 230000006735 deficit Effects 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000009530 blood pressure measurement Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 10
- 230000009466 transformation Effects 0.000 abstract description 10
- 239000012466 permeate Substances 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 13
- 238000011010 flushing procedure Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000002981 blocking agent Substances 0.000 description 2
- 239000009096 changqing Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a method applicable to repeatedly transforming a stratum nearby a shaft of a low-pressure gas field old well to complete permanent blocking. The method is characterized by mixing micro-grade resin with cement before repeated transformation, pumping a mixture of the micro-grade resin and the cement into the stratum nearby the shaft, and permanently blocking holes and cracks in a low-pressure voidage zone around the old well. According to the method applicable to repeatedly transforming the stratum nearby the shaft of the low-pressure gas field old well to complete the permanent blocking, provided by the invention, the micro-grade resin and the cement are mixed, and the mixture of the micro-grade resin, and the cement is pumped into the stratum around the shaft before refracturing; since the particle diameter of ultrafine plugging agent particles is smaller and the ultrafine plugging agent particles have good fluidity and good penetrability, the ultrafine plugging agent particles can permeate into the holes of a reservoir stratum so as to permanently block the holes and the cracks in the low-pressure voidage zone around the old well, leakage of fracturing liquid to the stratum is slowed down, and the fracture making efficiency of the fracturing liquid is increased.
Description
Technical field
The invention belongs to low pressure and low permeability breathe freely stimulation technology field, field, be specifically related to a kind of be applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation.
Background technology
Along with gas field development degree continuous intensification, low yield inefficient well ratio increases year by year, and stable yields situation is increasingly serious.For improving well yield, excavating Oil/gas Well productive potentialities, selected part main layer sand body is grown, reservoir properties is good, accumulating condition is excellent, but refracturing transformation carried out by the Production development old well poor compared with offset well.Different from the transformation of new well, old well is due to long-term production, nearly pit shaft area stratum energy is in debt, cause well killing fluid and fracturing fluid wastage in work progress big, not only reservoir caused secondary injury, and liquid to make seam efficiency low, fracture extension is apart from limited, after transformation, the discharge opeing cycle is long, discharge opeing weak effect, does not reaches expection transformation target.
At present Changqing oilfields repeats transformation for the old well of low-pressure gas well, blocks up well killing fluid temporarily only with Low Damage to prevent well killing fluid leak-off, but application DeGrain, it is impossible to effectively solving practical problems.Repeat to transform stratum permanent block up design method to this end, need the old well in a kind of gas field of invention badly, can complete, to the low pressure deficit district permanent closure of reservoir around pit shaft, to meet the old well in current gas field and repeat to transform the urgent needs of anti-filter potentiation with existing fracturing unit.
Summary of the invention
It is an object of the invention to overcome prior art in the old well of low-pressure gas well repeats transformation, well killing fluid and fracturing fluid wastage are big, do not reach a difficult problem for expection transformation target.
For this, the invention provides and a kind of be applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, by micron order resin and cement mixture before repeating to transform, pump in nearly wellbore formation after mixture, by the permanent closure of low pressure deficit district's hole and crack around old well.
Micron order resin is determined by gas well recovery percent of reserves with cement mixed ratio:
1) when gas well recovery percent of reserves is less than 30%, the weight ratio of resin and cement is 1:9；
2) when gas well recovery percent of reserves is less than 60% more than 30%, the weight ratio of resin and cement is 2:8；
3) when gas well recovery percent of reserves is more than 60%, the weight ratio of resin and cement is 3:7.
After micron order resin and cement mixture, injection rate is determined by gas well recovery percent of reserves and gas pay thickness；
1) when gas well recovery percent of reserves is less than 30%, injection rate is every meter of gas pay thickness 8.0m3；
2) when gas well recovery percent of reserves is less than 60% more than 30%, injection rate is every meter of gas pay thickness 12m3；
3) when gas well recovery percent of reserves is more than 60%, injection rate is every meter of gas pay thickness 15m3。
Described gas well recovery percent of reserves can the amount of adopting ratio calculation with the amount of adopting and reality.
Described micron order resin particle diameter is 3.0-12.0 μm.
A kind of it is applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, comprises the following steps:
Step 1) determines micron order resin and cement mixed ratio and injection rate according to gas well recovery percent of reserves and gas pay thickness；
Step 2) it is pumped in nearly wellbore formation after micron order resin and cement mixture；
Step 3) closing well Hou Ning；
Step 4) nitrogen pressure testing 30MPa, pressure measurement is dropped 30 minutes, if 30 minutes pressure is dropped by less than 0.5MPa, is shown that nearly wellbore formation blocks successfully, proceed step 5)；If nearly wellbore formation closure is unsuccessful, then repeat step 2) and step 3)；
After step 5) closure is qualified, to interval of interest again perforation；
Step 6) refracturing is transformed.
Step 2) in after micron order resin and cement mixture pump displacement control at 1-2m3Within/min.
The described closing well Hou Ning time is not less than 7 days.
Described micron order resin relative molecular mass is 3000-4000.
The invention has the beneficial effects as follows:
This of present invention offer is applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, use micron order resin and cement mixture, pump in pit shaft surrounding formation before refracturing, owing to ultra-fine blocking agent grain diameter is little, there is good mobility and penetrance, it is possible to infiltrate through in reservoir pore space, by the permanent closure of low pressure deficit district's hole and crack around old well, slowing down fracturing fluid leak-off in stratum, that improves fracturing fluid makes seam efficiency.
It is described in further details below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is nearly wellbore formation pressure schematic diagram before gas well is gone into operation；
Fig. 2 is nearly wellbore formation pressure schematic diagram after gas well is gone into operation；
Fig. 3 is that micron order resin and cement mixture are injected nearly pit shaft area, closure pit shaft low pressure deficit district stratum schematic diagram by the inventive method.
Detailed description of the invention
Embodiment 1:
Present embodiments provide and a kind of be applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, by micron order resin and cement mixture before repeating to transform, pump in nearly wellbore formation after mixture, by the permanent closure of low pressure deficit district's hole and crack around old well.
Know-why: by means of micron order resin, pump in pit shaft surrounding formation before refracturing, owing to ultra-fine blocking agent grain diameter is little, there is good mobility and penetrance, can infiltrate through in reservoir pore space, by the permanent closure of low pressure deficit district's hole and crack around old well, slowing down fracturing fluid leak-off in stratum, that improves fracturing fluid makes seam efficiency.
Embodiment 2:
On the basis of embodiment 1, a kind of it is applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, comprises the following steps:
Step 1) determines micron order resin and cement mixed ratio and injection rate according to gas well recovery percent of reserves and gas pay thickness；
Step 2) it is pumped in nearly wellbore formation after micron order resin and cement mixture；
Step 3) closing well Hou Ning；
Step 4) nitrogen pressure testing 30MPa, pressure measurement is dropped 30 minutes, if 30 minutes pressure is dropped by less than 0.5MPa, is shown that nearly wellbore formation blocks successfully, proceed step 5)；If nearly wellbore formation closure is unsuccessful, then repeat step 2) and step 3)；
After step 5) closure is qualified, to interval of interest again perforation；
Step 6) refracturing is transformed.
Owing to the Sulige gas field main force of Soviet Union gas pay is low porosity and low permeability reservoir, reservoir permeability is less than 1mD, little on the impact of resin material usage ratio, and this research mainly determines resin and superfine cement amount ratio with gas well recovery percent of reserves and gas pay thickness.Recovery percent of reserves can the amount of adopting calculate with reality with the amount of adopting the most.
Micron order resin is determined by gas well recovery percent of reserves with cement mixed ratio:
1) when gas well recovery percent of reserves is less than 30%, the weight ratio of resin and cement is 1:9；
2) when gas well recovery percent of reserves is less than 60% more than 30%, the weight ratio of resin and cement is 2:8；
3) when gas well recovery percent of reserves is more than 60%, the weight ratio of resin and cement is 3:7.
After micron order resin and cement mixture, injection rate is determined by gas well recovery percent of reserves and gas pay thickness；
1) when gas well recovery percent of reserves is less than 30%, injection rate is every meter of gas pay thickness 8.0m3；
2) when gas well recovery percent of reserves is less than 60% more than 30%, injection rate is every meter of gas pay thickness 12m3；
3) when gas well recovery percent of reserves is more than 60%, injection rate is every meter of gas pay thickness 15m3。
Wherein, step 2) in after micron order resin and cement mixture pump displacement control at 1-2m3Within/min.
In step 3), the closing well Hou Ning time is not less than 7 days.
The micron order resin used in the present embodiment is the three-dimensional unlimited polymer network of a kind of solidification that the cross-linking reaction between a kind of amino curing agent and a kind of epoxide produces, and its molecular structure is as follows.
This micron order resin particle diameter is 3.0-12.0 μm, and relative molecular mass is 3000-4000.Owing to its grain diameter is little, having good mobility and penetrance, it is possible to infiltrate through (0.1-15um is shouted in Changqing Gas Fields reservoir hole) in reservoir pore space, have stronger resistance to compression, anti-permeability performance, intensity is high, and means of press seals ability is strong (1000psi/ foot).Traditional cements can be entered or region that superfine cement all cannot arrive, it is possible to realize the permanent closure to reservoir.This system consumption is few, low cost, and operational procedure is simple, it is easy to operation.There is a following features:
(1) Solid Free can penetrate micron order hole；
(2) infinited-valued logic under Newtonian fluid-liquid condition；
(3) bond by force can anti-high pressure (23MPa/m)；
(4) resist chemical (acid/CO2)；
(5) complementary with cement；
(6) contamination resistance is strong (overcoming insufficient mud to replace)；
(7) compatible good (including water)；
(8) high-ductility (deformation can reach 20%)；
(9) high intensity and can boring；
(10) high resiliency, when testing in the environmental test stove at 162 °F (72 ° of C), resin material can be at 12500psi(86MPa) pressure under remain in that high resiliency.
Embodiment 3:
On-the-spot application example:
XX gas field is positioned at Depression Area, the southeast, XX basin XX rift slope belt, and main force's gas pay is glutenite, more densely, buries deep, and temperature is high, and pressure is high.Since exploitation in 2009, at pit shaft oil jacket and skill set, there is many places leak source, owing to annular space is with pressure and gas well pressure high, use traditional cements or superfine cement operation repeatedly to process and still cannot solve.
Within 2015, introduce micron order resin first, formulate site operation scheme and carry out on-the-spot test, use resin material and cement with 2:8 ratio mixture, implement closure operation.
Work progress:
(1) transport resin plugging material is to well site；
(2) mixture micron order resin and cement；
(3) mixture compound system pump 20m3, displacement control is at 1-2m3Within/min；
(4) cementing truck and construction pipeline are cleaned；
(5) wait solidifying being not less than 7 days；
(6) nitrogen pressure testing 30MPa.
On July 27th, 2015,17:00 scene nitrogen car group is to 5-1/2, and " carrying out pressure testing in Tao, pump truck suppresses 30MPa, voltage stabilizing 15 minutes, and pressure is qualified, returns out without gas at skill set valve, and nitrogen pressure testing is qualified, blocks successfully.As it is shown in figure 1, before not going into operation, strata pressure is original formation pressure, and stress is respectively to homogenizing；After operation, stress field changes, and along with the continuous growth of recovery time, nearly pit shaft area pressure is gradually reduced, and the pressure drop of biggest principal stress direction is apparently higher than minimum principal stress direction, as shown in Figure 2；Fig. 3 is that micron order resin and cement mixture are injected nearly pit shaft area, closure pit shaft low pressure deficit district stratum schematic diagram, makes up the pressure drop brought because of long-term production, reduces and repeat to transform fluid loss.
Carrying out refracturing transformation afterwards, construction main-process stream is as follows:
Drifting → well-flushing → pressure testing → perforation → fracturing tubing string → fracturing reform → open flow and discharge opeing → seek product
1) drifting: drift size gauge tool external diameter 115mm, length 1500mm, passes to artificial bottom of a well.
2) well-flushing: flushing fluid uses clear water, well-flushing discharge capacity is less than 1.0m3/ min, consumption specifically calculates according to casing volume, returns out flushing fluid content of impurities and is not more than 0.2%.
3) pressure testing: clear water pressure testing 30.0MPa, within 30 minutes, pressure is dropped by less than 0.5MPa.
4) perforation: use SYD-102 rifle, 127 bullets, carry out perforating job by " perforating design (advice note) ", emissivity more than 95%, Perforation Density 16 holes/m, 60 ° of perforation phase angle.Perforated interval error is less than 20cm, tightly notes well head, prevent blowout during perforation.
5) fracturing reform: for improving the secondary transformation degree of reservoir, fracturing string uses the construction of full well Ф 88.39mm oil pipe, and operational discharge capacity controls at 3.0-4.0m3/min.Return row for liquid after improving pressure to lead and sand phenomenon is told in control, add the measures such as fiber at construction pad stage companion's fluid injection nitrogen and mulling liquid.
6) open flow and discharge opeing: after modification measures terminates, drives a well for 20-40 minute, and the open flow initial stage uses Ф 3-8mm oil nozzle to control open flow, discharge capacity 100-200-300l/min.During open flow discharge opeing, sleeve gate is closed, accurate recording tubing pressure and casing pressure, and liquid measure is discharged in metering.If can not blowing, use other draining mode timely induced flow discharge opeing such as liquid nitrogen gaslift.
7) seeking product: oil, set pressure are in a basic balance, tubing pressure time rising value is less than 0.05MPa in 24 hours, proceeds to ask product or air water to reach to be pressed into formation breakdown liquid measure more than 80%, and Cl with going out well array liquid measure-Content undulating value in 3 days seeks product less than turning after 5%.Generating method uses " one point method ".
Exemplified as above is only the illustration to the present invention, is not intended that the restriction to protection scope of the present invention, within the every and same or analogous design of the present invention belongs to protection scope of the present invention.The method that the present embodiment describes the most in detail belongs to the common knowledge of the industry, describes the most one by one.
Claims (9)
1. one kind is applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, it is characterized in that: by micron order resin and cement mixture before repeating to transform, pump in nearly wellbore formation after mixture, by the permanent closure of low pressure deficit district's hole and crack around old well.
The most according to claim 1 a kind of it is applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, it is characterised in that: micron order resin is determined by gas well recovery percent of reserves with cement mixed ratio；
1) when gas well recovery percent of reserves is less than 30%, the weight ratio of resin and cement is 1:9；
2) when gas well recovery percent of reserves is less than 60% more than 30%, the weight ratio of resin and cement is 2:8；
3) when gas well recovery percent of reserves is more than 60%, the weight ratio of resin and cement is 3:7.
The most according to claim 1 a kind of it is applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, it is characterised in that: after micron order resin and cement mixture, injection rate is determined by gas well recovery percent of reserves and gas pay thickness；
1) when gas well recovery percent of reserves is less than 30%, injection rate is every meter of gas pay thickness 8.0m3；
2) when gas well recovery percent of reserves is less than 60% more than 30%, injection rate is every meter of gas pay thickness 12m3；
3) when gas well recovery percent of reserves is more than 60%, injection rate is every meter of gas pay thickness 15m3。
4. it is applicable to, according to a kind of described in Claims 2 or 3, the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, it is characterised in that: described gas well recovery percent of reserves can the amount of adopting ratio calculation with the amount of adopting and reality.
The most according to claim 2 a kind of it is applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, it is characterised in that: described micron order resin particle diameter is 3.0-12.0 μm.
The most according to claim 2 a kind of it is applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, it is characterised in that comprise the following steps:
Step 1) determines micron order resin and cement mixed ratio and injection rate according to gas well recovery percent of reserves and gas pay thickness；
Step 2) it is pumped in nearly wellbore formation after micron order resin and cement mixture；
Step 3) closing well Hou Ning；
Step 4) nitrogen pressure testing 30MPa, pressure measurement is dropped 30 minutes, if 30 minutes pressure is dropped by less than 0.5MPa, is shown that nearly wellbore formation blocks successfully, proceed step 5)；If nearly wellbore formation closure is unsuccessful, then repeat step 2) and step 3)；
After step 5) closure is qualified, to interval of interest again perforation；
Step 6) refracturing is transformed.
The most according to claim 6 a kind of be applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, it is characterised in that: step 2) in after micron order resin and cement mixture pump displacement control at 1-2m3Within/min.
The most according to claim 6 a kind of it is applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, it is characterised in that: the described closing well Hou Ning time is not less than 7 days.
The most according to claim 2 a kind of it is applicable to the method that the old well in low pressure gas field repeats to transform the permanent closure of nearly wellbore formation, it is characterised in that: described micron order resin relative molecular mass is 3000-4000.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989589A (en) * | 2017-11-28 | 2018-05-04 | 青海九0六工程勘察设计院 | A kind of method of heat exchange efficiency after raising hot dry rock pressure break |
| CN109138954A (en) * | 2018-08-29 | 2019-01-04 | 中国石油大学(北京) | A kind of refracturing method of Unconventional gas |
| CN111155952A (en) * | 2019-12-30 | 2020-05-15 | 山西晋城无烟煤矿业集团有限责任公司 | Method for recycling abandoned coal bed gas well in goaf |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5327969A (en) * | 1993-04-30 | 1994-07-12 | Halliburton Company | Method of preventing gas migration during primary well cementing |
| CN103216211A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | Method for carrying out profile control on fracture-type oil reservoir |
| CN103321606A (en) * | 2013-07-02 | 2013-09-25 | 中国石油集团川庆钻探工程有限公司 | Low-permeability fractured reservoir oil well water-plugging and screening method |
| CN104109514A (en) * | 2014-05-15 | 2014-10-22 | 中国石油化工股份有限公司 | Plugging agent system for permanently plugging multilayer low-pressure large-tunnel oil reservoir and technology using the same |
| CN104727798A (en) * | 2015-03-30 | 2015-06-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Low permeability gas reservoir turning repeated fracturing technological method |
-
2016
- 2016-04-14 CN CN201610229259.2A patent/CN105888604B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5327969A (en) * | 1993-04-30 | 1994-07-12 | Halliburton Company | Method of preventing gas migration during primary well cementing |
| CN103216211A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | Method for carrying out profile control on fracture-type oil reservoir |
| CN103321606A (en) * | 2013-07-02 | 2013-09-25 | 中国石油集团川庆钻探工程有限公司 | Low-permeability fractured reservoir oil well water-plugging and screening method |
| CN104109514A (en) * | 2014-05-15 | 2014-10-22 | 中国石油化工股份有限公司 | Plugging agent system for permanently plugging multilayer low-pressure large-tunnel oil reservoir and technology using the same |
| CN104727798A (en) * | 2015-03-30 | 2015-06-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Low permeability gas reservoir turning repeated fracturing technological method |
Non-Patent Citations (1)
| Title |
|---|
| 张雁: "新型吸水树脂微球的制备及封堵性能研究", 《石油钻采工艺》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989589A (en) * | 2017-11-28 | 2018-05-04 | 青海九0六工程勘察设计院 | A kind of method of heat exchange efficiency after raising hot dry rock pressure break |
| CN107989589B (en) * | 2017-11-28 | 2019-12-03 | 青海九0六工程勘察设计院 | A method of improving heat exchange efficiency after hot dry rock pressure break |
| CN109138954A (en) * | 2018-08-29 | 2019-01-04 | 中国石油大学(北京) | A kind of refracturing method of Unconventional gas |
| CN111155952A (en) * | 2019-12-30 | 2020-05-15 | 山西晋城无烟煤矿业集团有限责任公司 | Method for recycling abandoned coal bed gas well in goaf |
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