CN101270277A - Horizontal well staged perforation fracturing process for self-breaking liquid rubber plug and rubber plug - Google Patents
Horizontal well staged perforation fracturing process for self-breaking liquid rubber plug and rubber plug Download PDFInfo
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- CN101270277A CN101270277A CNA2008101056422A CN200810105642A CN101270277A CN 101270277 A CN101270277 A CN 101270277A CN A2008101056422 A CNA2008101056422 A CN A2008101056422A CN 200810105642 A CN200810105642 A CN 200810105642A CN 101270277 A CN101270277 A CN 101270277A
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- guanidine
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- glue solution
- horizontal well
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- 239000007788 liquid Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title abstract description 6
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims abstract description 114
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims abstract description 57
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000000843 powder Substances 0.000 claims abstract description 34
- 238000002360 preparation method Methods 0.000 claims abstract description 17
- 239000003292 glue Substances 0.000 claims description 66
- 239000000243 solution Substances 0.000 claims description 53
- 239000003795 chemical substances by application Substances 0.000 claims description 46
- 239000011159 matrix material Substances 0.000 claims description 31
- 244000250129 Trigonella foenum graecum Species 0.000 claims description 14
- 235000001484 Trigonella foenum graecum Nutrition 0.000 claims description 14
- 235000001019 trigonella foenum-graecum Nutrition 0.000 claims description 14
- 239000004160 Ammonium persulphate Substances 0.000 claims description 13
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 13
- 235000019395 ammonium persulphate Nutrition 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims description 11
- JDXXTKLHHZMVIO-UHFFFAOYSA-N 2-(3-hydroxypropyl)guanidine Chemical compound NC(=N)NCCCO JDXXTKLHHZMVIO-UHFFFAOYSA-N 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 229910021538 borax Inorganic materials 0.000 claims description 8
- 239000004328 sodium tetraborate Substances 0.000 claims description 8
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000003431 cross linking reagent Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 18
- 239000012530 fluid Substances 0.000 description 10
- 208000027418 Wounds and injury Diseases 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 208000014674 injury Diseases 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
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- Adhesives Or Adhesive Processes (AREA)
Abstract
A horizontal well staged perforation fracturing process with a self-breaking liquid rubber plug and the rubber plug are applied to staged fracturing of a horizontal well of an oil-gas field. Is characterized in that: the preparation process of the rubber plug comprises the following steps: preparing the guanidine gum powder, preparing a guanidine gum base solution, and preparing the water-soluble self-breaking liquid rubber plug from the guanidine gum base solution powder and a cross-linking agent. The staged perforating and fracturing process includes setting the perforating and fracturing string into the bottom stratum of the horizontal well, and hydraulic jetting to fracture and fracture the bottom stratum. Then injecting water-soluble self-breaking rubber liquid rubber plug. And lifting the perforating fracturing string to the second layer. And carrying out staged perforation fracturing by adopting hydraulic jetting to press open the second stratum of the horizontal well. Fracturing a multi-layer formation is completed. The effect is as follows: the rubber plug can bear certain pressure difference when in use, has good temperature resistance and adjustable gel forming time, can automatically break gel, has controllable gel breaking time, can realize effective plugging during fracturing, and realizes staged fracturing of a horizontal well.
Description
Technical field
The present invention relates to oilfield perforating and fracturing technical field, the water-soluble self-breaking glue solution body of particularly a kind of oil-gas field horizontal well plug is assisted segmenting perforating pressure break novel process.
Background technology:
Oilfield horizontal well need often carry out the multistage staged fracturing, improves the drainage area on stratum, improves crude production rate and recovery ratio.Adopt the segmenting perforating fracturing technology can realize staged fracturing, the intact the first layer of pressure break often needs lower floor is carried out the shutoff operation when the pressure break upper strata.The shutoff mode has pkr+capping tools (bridging plug) and liquid gum plug etc.Pkr+capping tools (bridging plug) long construction period, instrument removes and has a big risk; In the liquid gum plug shutoff operation, particularly existing plugging agent, often intensity is too high, can not soften brokenly glue, need bore the plug operation, and the injury to reservoir in the operation process is often very big.Traditional hydrojet staged fracturing technology when pressure break the preceding paragraph, is unimpeded between the levels, and fluid only depends on hydrojet to carry out orientation, fluid inevitably can occur and carry out leak-off to the crack that lower floor has pressed off.
For this reason, in hydrojet segmenting perforating pressing crack construction, adopt water-soluble self-breaking glue solution body plug shutoff lower floor, prevent that liquid from entering, aquation or the de-plugging of employing chemical process aquation automatically again is little to the injury on stratum after waiting to have pressed, and can realize the horizontal well in segments perforating and fracturing easily.
The Chinese patent publication number is CN1869149A, discloses a kind of high density fracturing liquid, has adopted inorganic salt, guar gum, linking agent and gel breaker etc. to form fracturing liquid.
Summary of the invention:
The objective of the invention is to be oil-gas field self-breaking glue solution body plug horizontal well in segments perforating and fracturing technology and plug, it realizes pressure break by hydrojet, water-soluble self-breaking glue solution body plug cuts off the passage of lower floor's fluid and top fluid, can make things convenient for succinct realization horizontal well multistage to separate pressure break, form many hydraulic fractures at horizontal section, construction period is shortened, separate pressure break efficient height than machine tool, littler than traditional liquid plug back-up sand staged fracturing to the injury of reservoir, more effective than the separation of traditional hydrojet pressure break.
The technical solution used in the present invention is: the water-soluble self-breaking glue solution body of a kind of oil-gas field plug, and water-soluble self-breaking glue solution body plug is made up of guanidine matrix liquid and linking agent potassium bichromate, and guanidine matrix liquid and linking agent potassium bichromate weight part ratio are 100: 0.3~0.6;
Described guanidine matrix liquid is made up of water, the agent of guanidine rubber powder, fenugreek gum, ammonium persulphate, and the weight part ratio of water, the agent of guanidine rubber powder, fenugreek gum and ammonium persulphate is 100: 2~3: 2~3: 0.1~0.5;
The agent of described guanidine rubber powder is made up of hydroxypropyl guanidine that rubber powder and borax, and hydroxypropyl guanidine that rubber powder and borax weight part ratio are 2~3: 0.4~0.6.
Water-soluble self-breaking glue solution body plug preparation process is divided into: the agent of preparation guanidine rubber powder, and preparation guanidine matrix liquid, guanidine matrix liquid pulvis and linking agent are made water-soluble self-breaking glue solution body plug three steps:
A, the agent of preparation guanidine rubber powder: the agent of guanidine rubber powder is made up of hydroxypropyl guanidine that rubber powder and borax, and its weight part ratio is 2~3: 0.4~0.6; Mix.The limited Duties of carat Mary Yi Xinke Australia chemical industry (collection Mission) appoints company and long celebrating chemical plant, down-hole that hydroxypropyl guanidine that rubber powder product is arranged.
B, preparation guanidine matrix liquid: guanidine matrix liquid is made up of water, the agent of guanidine rubber powder, fenugreek gum and ammonium persulphate, and the weight part ratio of water, the agent of guanidine rubber powder, fenugreek gum and ammonium persulphate is 100: 2~3: 2~3: 0.1~0.5.At first water and the agent of guanidine rubber powder are stirred in jar; Then fenugreek gum is added in the jar and stir; Adding ammonium persulphate at last stirs.Preparation guanidine matrix liquid under normal temperature, condition of normal pressure.There is the fenugreek gum product in Sixian County, Anhui Province vegetable jelly limited liability company.
C, guanidine matrix liquid and linking agent are made water-soluble self-breaking glue solution body plug: water-soluble self-breaking glue solution body plug comprises guanidine matrix liquid and linking agent, and linking agent is a potassium bichromate.The weight part ratio of guanidine matrix liquid and linking agent potassium bichromate is 100: 0.3~0.6.The linking agent potassium bichromate is joined in the guanidine matrix liquid in proportion, stir while adding, within 10~30 minutes, adopt fracturing truck to inject into well, in well, become water-soluble self-breaking glue solution body plug.Well temperature is in the time of 40~60 ℃, and plug intensity reaches solid state, and plug can keep intensity 1~6h.The softening then and broken glue of plug, the viscosity of breaking glue solution is less than 50mPa.s.
Described water is fresh water or seawater.
Prepare water-soluble self-breaking glue solution body plug according to the down-hole actual requirement.The technician can finish by this compound method according to the down-hole actual requirement.
Oil-gas field self-breaking glue solution body plug horizontal well in segments perforating and fracturing technology is:
At first the perforating and fracturing tubing string is lowered to the most the lower layer of stratum of horizontal well, adopts hydrojet to carry out the segmenting perforating pressure break and press off the bottom jet segment of horizontal well, on carry perforating and fracturing tubing string to the second jet segment.After adopting fracturing truck water-soluble self-breaking glue solution body plug to be injected in the middle of first and second jet segments, treating that water-soluble self-breaking glue solution body plug becomes glue to seal lower floor, adopt hydrojet to carry out the segmenting perforating pressure break and press off second jet segment of horizontal well then.And then on carry three jet segments of perforating and fracturing tubing string to the, inject respectively in the middle of water-soluble self-breaking glue solution body plug to the second and the 3rd jet segment, after treating that water-soluble self-breaking glue solution body plug becomes glue to seal lower floor, adopt hydrojet to carry out the segmenting perforating pressure break and press off the 3rd jet segment of horizontal well.So continue to carry out,, can finish the fractured horizontal well multistage by upper lifting pipe post and injection plug.
In order to guarantee water-soluble self-breaking glue solution body plug, effective formerly fractured layer and ongoing fractured layer of packing, the distance between described first fractured layer and the ongoing fractured layer is between 70~800 meters.
Described the perforating and fracturing tubing string being lowered to the horizontal well stratum, adopting hydrojet to carry out the segmenting perforating pressure break and press off the horizontal well stratum, is prior art, and those skilled in the art knows.
The invention characteristics: the present invention it by horizontal well hydrojet segmenting perforating fracturing technology and water-soluble self-breaking glue solution body plug are carried out combination, utilizing hydrojet to carry out segmenting perforating pressure break connection does, adopt water-soluble self-breaking glue solution body plug to cut off two intersegmental fluid channels when pressure break, the separation when making pressure break is more effective.
The present invention has carried out the innovation aspect three on the horizontal well in segments fracturing reform.
1, segmenting perforating pressure break connection work is carried out in hydrojet
Utilize hydrojet technology to carry out the horizontal well perforation operation, oil jacket carries out frac job with annotating then, pressed the first layer, last pressure-raising splits drilling tool, carry out carrying drilling tool to second layer position in the operation of the second layer, adopt hydrojet to press off the horizontal well second layer, by that analogy, can work continuously, press off multilayer.
2, pressed and injected the fluid channel that water-soluble self-breaking glue solution body plug cuts off two interlayers behind one deck.Water-soluble self-breaking glue solution body plug is the shutoff that realizes two interlayers for better, increases the ability of artificial control staged fracturing.It is the most the lower layer of to adopt hydrojet to press off horizontal well, injects water-soluble self-breaking glue solution body plug then, on carry drilling tool to second layer position, after treating that liquid gum plug becomes glue to seal lower floor, adopt the segmenting perforating pressure break to press off the horizontal well second layer, by that analogy, can work continuously, press off multilayer.Having overcome traditional hydrojet staged fracturing technology, when the pressure break last layer, is unimpeded between the levels, and fluid only depends on hydrojet to carry out orientation, fluid occurs and carries out leak-off to the crack that lower floor has pressed off.The partition effect of water-soluble self-breaking glue solution body plug can effectively prevent the generation of this phenomenon, the validity that enhanced level well staged fracturing is separated.
Beneficial effect of the present invention: the present invention realizes the horizontal well fracturing of separate layers by hydrojet, water-soluble self-breaking glue solution body plug cuts off the passage of lower floor's fluid and top fluid, form many hydraulic fractures at horizontal section, construction period is shortened, separate pressure break efficient height than machine tool, littler than traditional liquid plug back-up sand staged fracturing to the injury of reservoir, more effective than the separation of traditional hydrojet pressure break.This plug can bear certain pressure reduction in use, and heat resistance is good, and gelation time is adjustable, and can break glue automatically, and the broken glue time is controlled, the effective shutoff in the time of can realizing pressure break.
Embodiment
Embodiment 1:
Prepare water-soluble self-breaking glue solution body plug:
A, the agent of preparation guanidine rubber powder: the agent of guanidine rubber powder is made up of hydroxypropyl guanidine that rubber powder and borax, and its weight part ratio is 2.5: 0.5; Mix.
B, preparation guanidine matrix liquid: guanidine matrix liquid is made up of fresh water, the agent of guanidine rubber powder, fenugreek gum and ammonium persulphate, and the weight part ratio of fresh water, the agent of guanidine rubber powder, fenugreek gum and ammonium persulphate is 100: 2.5: 2.5: 0.5.At first water and the agent of guanidine rubber powder are stirred in jar; Then fenugreek gum is added in the jar and stir; Adding ammonium persulphate at last stirs.Preparation guanidine matrix liquid under normal temperature, condition of normal pressure.
C, guanidine matrix liquid and linking agent are made water-soluble self-breaking glue solution body plug: plug comprises guanidine matrix liquid and linking agent, and linking agent is a potassium bichromate.The weight part ratio of guanidine matrix liquid and linking agent is 100: 0.6.Linking agent is joined in the guanidine matrix liquid in proportion, stir while adding, 25 minutes, adopt fracturing truck to inject into well, in well, become water-soluble self-breaking glue solution body plug.Well temperature is in the time of 45 ℃, and plug intensity reaches solid state, and plug can keep intensity 5h.The softening then and broken glue of plug, the viscosity of breaking glue solution is less than 50mPa.s.
According to the down-hole actual requirement, prepare water-soluble self-breaking glue solution body plug quantity.
Utilize water-soluble self-breaking glue solution body plug to carry out horizontal well in segments perforating and fracturing technology to be:
At first the perforating and fracturing tubing string is lowered to the most the lower layer of stratum of horizontal well, adopts hydrojet to carry out the segmenting perforating pressure break and press off the bottom jet segment of horizontal well, on carry perforating and fracturing tubing string to the second jet segment.After adopting fracturing truck water-soluble self-breaking glue solution body plug to be injected in the middle of first and second jet segments, treating that water-soluble self-breaking glue solution body plug becomes glue to seal lower floor, adopt hydrojet to carry out the segmenting perforating pressure break and press off second jet segment of horizontal well then.And then on carry three jet segments of perforating and fracturing tubing string to the, inject respectively in the middle of water-soluble self-breaking glue solution body plug to the second and the 3rd jet segment, after treating that water-soluble self-breaking glue solution body plug becomes glue to seal lower floor, adopt hydrojet to carry out the segmenting perforating pressure break and press off the 3rd jet segment of horizontal well.So continue to carry out,, can finish the fractured horizontal well multistage by upper lifting pipe post and injection plug.
Distance between elder generation's fractured layer and the ongoing fractured layer is 100 meters.
The weight part ratio of embodiment 2,3,4 and water-soluble each component of self-breaking glue solution body plug of 5 is listed as follows:
Embodiment 2,3,4 and each ingredients weight parts ratio of 5
The preparation method and the horizontal well in segments perforating and fracturing technology of embodiment 2,3,4 and 5 the water-soluble self-breaking glue solution body of oil-gas field plug, substantially the same manner as Example 1.
Claims (4)
1, the water-soluble self-breaking glue solution body of a kind of oil-gas field plug is characterized in that:
Water-soluble self-breaking glue solution body plug is made up of guanidine matrix liquid and linking agent potassium bichromate, and guanidine matrix liquid and linking agent potassium bichromate weight part ratio are 100: 0.3~0.6;
Described guanidine matrix liquid is made up of water, the agent of guanidine rubber powder, fenugreek gum, ammonium persulphate, and the weight part ratio of water, the agent of guanidine rubber powder, fenugreek gum and ammonium persulphate is 100: 2~3: 2~3: 0.1~0.5;
The agent of described guanidine rubber powder is made up of hydroxypropyl guanidine that rubber powder and borax, and hydroxypropyl guanidine that rubber powder and borax weight part ratio are 2~3: 0.4~0.6.
2, water-soluble self-breaking glue solution body plug preparation process is characterized in that: be divided into the agent of preparation guanidine rubber powder, and preparation guanidine matrix liquid, guanidine matrix liquid and linking agent are made water-soluble self-breaking glue solution body plug three steps:
A, the agent of preparation guanidine rubber powder: the agent of guanidine rubber powder is made up of hydroxypropyl guanidine that rubber powder and borax, and hydroxypropyl guanidine that rubber powder and borax weight part ratio are 2~3: 0.4~0.6; Mix;
B, preparation guanidine matrix liquid: guanidine matrix liquid is made up of water, the agent of guanidine rubber powder, fenugreek gum, ammonium persulphate, and the weight part ratio of water, the agent of guanidine rubber powder, fenugreek gum and ammonium persulphate is 100: 2~3: 2~3: 0.1~0.5; At first water and the agent of guanidine rubber powder are stirred in jar; Then fenugreek gum is added in the jar and stir; Adding ammonium persulphate at last stirs; Preparation guanidine matrix liquid under normal temperature, condition of normal pressure;
C, guanidine matrix liquid and linking agent are made water-soluble self-breaking glue solution body plug: water-soluble self-breaking glue solution body plug comprises guanidine matrix liquid and linking agent, linking agent is a potassium bichromate, the weight part ratio of guanidine matrix liquid and linking agent potassium bichromate is 100: 0.3~0.6, the linking agent potassium bichromate is joined in the guanidine matrix liquid in proportion, stir while adding, within 10~30 minutes, the employing fracturing truck injects into well, in well, become water-soluble self-breaking glue solution body plug, well temperature is in the time of 40~60 ℃, plug intensity reaches solid state, plug can keep intensity 1~6h, the softening voluntarily and broken glue of water-soluble then self-breaking glue solution body plug forms liquid behind the broken glue, and the viscosity of liquid is less than 50mPa.s.
3, utilize self-breaking glue solution body plug to carry out horizontal well in segments perforating and fracturing technology, it is characterized in that:
At first the perforating and fracturing tubing string is lowered to the most the lower layer of stratum of horizontal well, adopt hydrojet to carry out the segmenting perforating pressure break and press off the bottom jet segment of horizontal well, on carry perforating and fracturing tubing string to the second jet segment, then in the middle of the employing fracturing truck is injected into water-soluble self-breaking glue solution body plug first and second jet segments, after treating that water-soluble self-breaking glue solution body plug becomes glue to seal lower floor, adopt hydrojet to carry out the segmenting perforating pressure break and press off second jet segment of horizontal well; And then on carry three jet segments of perforating and fracturing tubing string to the, inject respectively in the middle of water-soluble self-breaking glue solution body plug to the second and the 3rd jet segment, after treating that water-soluble self-breaking glue solution body plug becomes glue to seal lower floor, adopt hydrojet to carry out the segmenting perforating pressure break and press off the 3rd jet segment of horizontal well, so continue to carry out, by upper lifting pipe post and injection plug, can finish the fractured horizontal well multistage.
4, segmenting perforating fracturing technology according to claim 3 is characterized in that: the distance between described first fractured layer and the ongoing fractured layer is between 70~800 meters.
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CN109294541B (en) * | 2018-09-25 | 2021-03-09 | 中国石油天然气股份有限公司 | Fire flooding well self-degradation temporary plugging agent and preparation method and application thereof |
CN112302604A (en) * | 2019-07-31 | 2021-02-02 | 中国石油化工股份有限公司 | Horizontal well subsection repeated fracturing method and application thereof |
CN112302604B (en) * | 2019-07-31 | 2023-01-24 | 中国石油化工股份有限公司 | Horizontal well subsection repeated fracturing method and application thereof |
CN113088271A (en) * | 2021-04-09 | 2021-07-09 | 中国石油天然气股份有限公司 | Sulfur-resistant liquid rubber plug and preparation method thereof |
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