CN109554172A - A kind of acid fracturing diverting agent and its application - Google Patents
A kind of acid fracturing diverting agent and its application Download PDFInfo
- Publication number
- CN109554172A CN109554172A CN201710886795.4A CN201710886795A CN109554172A CN 109554172 A CN109554172 A CN 109554172A CN 201710886795 A CN201710886795 A CN 201710886795A CN 109554172 A CN109554172 A CN 109554172A
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- Prior art keywords
- diverting agent
- acid fracturing
- acid
- fracturing diverting
- temporary plugging
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
Abstract
The invention belongs to field of oil development, a kind of acid fracturing diverting agent and its application are specifically provided.The formula of the acid fracturing diverting agent includes in percentage by weight: temporarily stifled fiber 0.1~3%, non-expansion type temporary plugging ball A 0.05~3%, intumescent temporary plugging ball B 0.1~3%, propping sand 0.1~1%, dispersing agent 0.05~1%, and surplus is to carry liquid.The acid fracturing diverting agent and formation fluid compatibility are good, chemical stability is good, sealing ratiod is high and dissolution thoroughly, be applicable to carbonate rock temperature reservoirs.
Description
Technical field
The invention belongs to field of oil development, and in particular to a kind of acid fracturing diverting agent and its in carbonate rock temperature reservoirs
Application.
Background technique
Acidfracturing treatment technology is one of the dominant technology of carbonate rock hydrocarbon reservoir development well volume increase and stable yields, wherein
The temporary deblocking technology technology of acid fracturing is that acid solution and degradable (dissolution) diverting agent are generally injected reservoir together, by reservoir middle and high infiltration
The temporary closure of layer reduces the permeability of high permeability formation to block high permeability formation as main means, improves the seepage flow resistance of high permeability formation
Power makes acid solution enter middle low-permeability layer, after transformation temporarily block up material can fully degraded or dissolution, do not influence the infiltration of each permeable formation
Circulation road, to guarantee that production capacity maximizes；Acid fracturing temporarily blocks up steering technique by effectively improving acid solution efficiency and active area, guarantees
The realization of efficient acidfracturing treatment.
Currently, common temporarily stifled material includes solid granular diverting agent, organogel class diverting agent and fiber-like are temporary
Blocking agent etc., wherein it is most commonly seen with solid granular diverting agent, such as sheet benzoic acid and salt particle, oil-soluble resin or paraffin
Particle, but such diverting agent has that dissolution is not thorough and causes to block crack etc..Frozen glue (viscoplasticity) class diverting agent includes
Water-soluble polymer, cross-linked polymer gel and viscoplasticity surfactant etc. are mainly used for blocking micron order crack.Degradable fibre
Though dimension diverting agent achieves preferable temporarily stifled effect in the acidification transformation of strong heterogeneity and intrinsic fracture development reservoir, its
It is chiefly used in drilling well and pressing crack construction, using less in acidification and acid fracturing construction.
The reservoir space of carbonate reservoir is complicated and changeable, mainly by primary stomata and joint set, pure fracture reservoir, molten
Hole and joint set are formed.For the temporary deblocking technology technical need of high temperature carbonate rock acid fracturing, it is urgent to provide a kind of and formation fluids
Compatibility is good, chemical stability is good, and sealing ratiod is high and dissolves thorough acid fracturing diverting agent.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a kind of acid fracturing diverting agent and its
Application in carbonate rock temperature reservoirs.The compounding of acid fracturing diverting agent of the invention by temporarily stifled material, envelope with higher
Stifled rate, while can be realized thorough dissolution.
According to the first aspect of the invention, the present invention provides a kind of acid fracturing diverting agent, the formula of the acid fracturing diverting agent is pressed
Include according to weight percent meter: temporarily stifled fiber 0.1~3%, non-expansion type temporary plugging ball A0.05~3%, intumescent temporary plugging ball B
0.1~3%, propping sand 0.1~1%, dispersing agent 0.05~1%, surplus is to carry liquid.
According to the second aspect of the invention, the present invention provides above-mentioned acid fracturing diverting agents in carbonate rock temperature reservoirs
Using.
Acid fracturing diverting agent of the invention is used in combination by will temporarily block up fiber and temporary plugging ball, while it is temporary to use intumescent
Stifled ball can reach high sealing ratiod into stratum intrinsic fracture or earlier man-made fracture, temporarily block up and formed in crack mouthful or crack
Higher than the pressure difference value of gash fracture pressure, prevent follow-up work liquid from flowing to intrinsic fracture or earlier man-made fracture, one
Fixed level two forms master under the conditions of stress difference, generating secondary rupture and then changing fracture initiation orientation to generate new crack
The fracture network system that crack and multistage secondary fracture interweave, the Reservoir Body as much as possible for linking up all directions improve reservoir
Overall Reconstruction volume increases aerial drainage volume, improves well yield；In addition, diverting agent of the invention is good with formation fluid compatibility,
With good chemical stability, and thorough degradation can be reached, be applicable to carbonate rock temperature reservoirs.
Specific embodiment
To keep the present invention easier to understand, below in conjunction with embodiment, the present invention will be described in detail, these embodiment party
Formula only serves illustrative, is not intended to restrict the invention.
According to the first aspect of the invention, the present invention provides a kind of acid fracturing diverting agent, the formula of the acid fracturing diverting agent is pressed
Include according to weight percent meter: temporarily stifled fiber 0.1~3%, non-expansion type temporary plugging ball A0.05~3%, intumescent temporary plugging ball B
0.1~3%, propping sand 0.1~1%, dispersing agent 0.05~1%, surplus is to carry liquid.
According to the present invention, the material of the temporarily stifled fiber can be selected from nylon, polyurethane, polycarbonate, phenolic resin, ureaformaldehyde
At least one of resin and polylactic acid.
In the present invention, the length of the temporarily stifled fiber can be 1~60mm, and fineness can be 1~80D.It is described under preferable case
Temporarily the length of stifled fiber is 1~20mm, and fineness is 1~40D.
Wherein, temporarily the fineness (degree of fiber thickness) of stifled fiber is indicated using indirect indexes, with fiber institute when fixed length
The quality representation having, i.e. denier (D): the weight grams of 9000 meters of long fibers.
According to the present invention, the material of the non-expansion type temporary plugging ball A can be selected from nylon, polyurethane, polycarbonate, phenolic aldehyde tree
At least one of rouge, Lauxite and polylactic acid.In addition, the diameter of the non-expansion type temporary plugging ball A can for 0.1~
20mm, preferably 1~10mm.
According to the present invention, the intumescent temporary plugging ball B can be by acrylamide, acrylic acid and 2- acrylamido -2-
Pre-crosslinking polymer made from least one of methyl propane sulfonic acid.The crosslinking agent for preparing the intumescent temporary plugging ball B use can
Think alchlor, zirconium oxychloride or chromium trichloride.
Intumescent temporary plugging ball B can be used solution polymerization process and be prepared, specific preparation method can refer to the prior art into
Row selection.
In the present invention, the diameter of the intumescent temporary plugging ball B can be 0.1~20mm, preferably 1~10mm.In addition, swollen
Swollen type temporary plugging ball B in application process, can generate volume expansion because of swelling, after generating expansion, the volume of intumescent temporary plugging ball B can
2~200 times for thinking its original volume.
The present invention blocks up fibre with temporary by the non-expansion type temporary plugging ball A and intumescent temporary plugging ball B that select diameter to match
Dimension is used cooperatively, to improve its sealing ratiod to working solution, in addition, the material that intumescent temporary plugging ball B is selected is precrosslink polymerization
Object increases the volume-tunable of temporarily stifled material, is more advantageous to the raising of sealing ratiod.
According to the present invention, the propping sand can be ceramsite sand and/or quartz sand, and partial size can be 10~100 mesh, preferably
20~80 mesh.
According to the present invention, the dispersing agent can be selected from alkyl phenol polyoxyethylene ether, tween, sapn and dodecyl sodium sulfonate
Sodium, C10-C20Aliphatic hydrocarbon, C2-C12Fatty alcohol and C10-C16At least one of fatty acid.
The specific example of the dispersing agent includes but is not limited to: OP-10, OP-20, Tween-20, Tween-60, Tween-
80, SP-20, SP-80, dodecyl sodium sulfate, lauric acid.
In the present invention, the liquid that carries can be the hydrochloric acid solution that mass concentration is 5~20%.
According to the second aspect of the invention, the present invention provides above-mentioned acid fracturing diverting agents in carbonate rock temperature reservoirs
Using.
Acid fracturing diverting agent of the invention is in 5~18MPa of pressure difference, and 80 DEG C~140 DEG C of temperature, to core surface pore throat sealing ratiod
It is close to 99%, the rock core after closure is placed into residual acid, and 12~48 hours releasing rates are up to 100%.
The present invention is described in detail by the following examples.
In the following Examples and Comparative Examples:
Temporarily the material of stifled fiber is nylon, and length is 1~20mm, and fineness is 1~40D.
The material of non-expansion type temporary plugging ball A is polylactic acid, and diameter is 1~10mm.
The diameter of intumescent temporary plugging ball B is 1~10mm.
Embodiment 1
This implementation is for illustrating acid fracturing diverting agent of the invention.
The formula of the acid fracturing diverting agent includes in percentage by weight: 1.0% temporarily blocks up fiber, and 0.1% non-expansion type is temporary
Stifled ball A, 0.1% intumescent temporary plugging ball B, 0.3% haydite (30~50 mesh), 0.05% dodecyl sodium sulfate, surplus 20%
The hydrochloric acid of mass concentration.The raw material of above-mentioned formula is mixed, is stirred evenly to get acid fracturing diverting agent.
Embodiment 2
This implementation is for illustrating acid fracturing diverting agent of the invention.
The formula of the acid fracturing diverting agent includes in percentage by weight: 2.0% temporarily blocks up fiber, and 0.5% non-expansion type is temporary
Stifled ball A, 0.3% intumescent temporary plugging ball B, 0.5% haydite (30~50 mesh), 0.05%OP-10, surplus are 10% mass concentration
Hydrochloric acid.The raw material of above-mentioned formula is mixed, is stirred evenly to get acid fracturing diverting agent.
Embodiment 3
This implementation is for illustrating acid fracturing diverting agent of the invention.
The formula of the acid fracturing diverting agent includes in percentage by weight: 0.5% temporarily blocks up fiber, and 0.05% non-expansion type is temporary
Stifled ball A, 0.1% intumescent temporary plugging ball B, 0.1% haydite (30~50 mesh), 0.05%SP-80, surplus are 20% mass concentration
Hydrochloric acid.The raw material of above-mentioned formula is mixed, is stirred evenly to get acid fracturing diverting agent.
Embodiment 4~6
Core simulation test is carried out using acid fracturing diverting agent prepared by Examples 1 to 3 respectively, in 5~18MPa of pressure difference, temperature
Degree 80 DEG C~140 DEG C, three kinds of acid fracturing diverting agents core surface pore throat sealing ratiod close to 99%, in addition, by after closure
Rock core is placed into residual acid, and 12~48 hours releasing rates are up to 100%.
Comparative example 1
The formula of the acid fracturing diverting agent includes in percentage by weight: 1.0% temporarily blocks up fiber, and 0.1% non-expansion type is temporary
Stifled ball A, 0.3% haydite (30~50 mesh), 0.05% dodecyl sodium sulfate, surplus are the hydrochloric acid of 20% mass concentration.It will be upper
The raw material mixing for stating formula, stirs evenly to get acid fracturing diverting agent.
Comparative example 2
The formula of the acid fracturing diverting agent includes in percentage by weight: 0.1% non-expansion type temporary plugging ball A, 0.1% expansion
Type temporary plugging ball B, 0.3% haydite (30~50 mesh), 0.05% dodecyl sodium sulfate, surplus are the hydrochloric acid of 20% mass concentration.
The raw material of above-mentioned formula is mixed, is stirred evenly to get acid fracturing diverting agent.
Comparative example 3~4
Core simulation test is carried out using acid fracturing diverting agent prepared by comparative example 1 and 2 respectively, in 5~18MPa of pressure difference, temperature
80 DEG C~140 DEG C of degree, two kinds of acid fracturing diverting agents are 89% in the sealing ratiod of core surface pore throat, in addition, by the rock core after closure
It is placed into residual acid, 12~48 hours releasing rates are up to 100%.
In comparative example 4~6 and comparative example 3~4 each acid fracturing diverting agent using result it is found that acid fracturing of the invention is temporary
Blocking agent can effectively improve sealing ratiod, and acid fracturing diverting agent of the invention can be realized by the combination of specific temporarily stifled material
Thoroughly dissolution.
The embodiment of the present invention is described above, above description is exemplary, and non-exclusive, and also not
It is limited to disclosed embodiment.Without departing from the scope and spirit of illustrated embodiment, for the art
Many modifications and changes are obvious for those of ordinary skill.
Claims (10)
1. a kind of acid fracturing diverting agent, which is characterized in that the formula of the acid fracturing diverting agent includes in percentage by weight: temporarily stifled fibre
Dimension 0.1~3%, non-expansion type temporary plugging ball A 0.05~3%, intumescent temporary plugging ball B 0.1~3%, propping sand 0.1~1%, point
Powder 0.05~1%, surplus are to carry liquid.
2. acid fracturing diverting agent according to claim 1, wherein the material of the temporarily stifled fiber is selected from nylon, polyurethane, gathers
At least one of carbonic ester, phenolic resin, Lauxite and polylactic acid.
3. acid fracturing diverting agent according to claim 1 or 2, wherein the length of the temporarily stifled fiber is 1~60mm, fineness
For 1~80D.
4. acid fracturing diverting agent according to claim 1, wherein the material of the non-expansion type temporary plugging ball A is selected from nylon, gathers
At least one of urethane, polycarbonate, phenolic resin, Lauxite and polylactic acid, a diameter of 0.1~20mm.
5. acid fracturing diverting agent according to claim 1, wherein the intumescent temporary plugging ball B is by acrylamide, acrylic acid
With pre-crosslinking polymer made from least one of 2- acrylamide-2-methylpro panesulfonic acid, the crosslinking agent used is three
Aluminium chloride, zirconium oxychloride or chromium trichloride.
6. acid fracturing diverting agent according to claim 1 or 5, wherein the diameter of the intumescent temporary plugging ball B be 0.1~
20mm。
7. acid fracturing diverting agent according to claim 1, wherein the propping sand is ceramsite sand and/or quartz sand, partial size
For 10~100 mesh.
8. acid fracturing diverting agent according to claim 1, wherein the dispersing agent be selected from alkyl phenol polyoxyethylene ether, tween,
Sapn, dodecyl sodium sulfate, C10-C20Aliphatic hydrocarbon, C2-C12Fatty alcohol and C10-C16At least one of fatty acid.
9. acid fracturing diverting agent according to claim 1, wherein the liquid that carries is the hydrochloric acid that mass concentration is 5~20%
Solution.
10. application of the acid fracturing diverting agent in carbonate rock temperature reservoirs described in any one of claim 1~9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710886795.4A CN109554172B (en) | 2017-09-26 | 2017-09-26 | Acid fracturing temporary plugging agent and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710886795.4A CN109554172B (en) | 2017-09-26 | 2017-09-26 | Acid fracturing temporary plugging agent and application thereof |
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| Publication Number | Publication Date |
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| CN109554172A true CN109554172A (en) | 2019-04-02 |
| CN109554172B CN109554172B (en) | 2021-10-29 |
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Cited By (1)
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| CN115287049A (en) * | 2021-12-23 | 2022-11-04 | 新奥科技发展有限公司 | High-temperature compression-resistant temporary plugging material and preparation method thereof |
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