CN107841301A - A kind of cleaning method in crosslinked polymer acid acid fracturing seam face - Google Patents
A kind of cleaning method in crosslinked polymer acid acid fracturing seam face Download PDFInfo
- Publication number
- CN107841301A CN107841301A CN201610832340.XA CN201610832340A CN107841301A CN 107841301 A CN107841301 A CN 107841301A CN 201610832340 A CN201610832340 A CN 201610832340A CN 107841301 A CN107841301 A CN 107841301A
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- CN
- China
- Prior art keywords
- acid
- main body
- fracturing
- acid fracturing
- liquid oxidizer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002253 acid Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004140 cleaning Methods 0.000 title claims abstract description 11
- 229920006037 cross link polymer Polymers 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000007800 oxidant agent Substances 0.000 claims abstract description 22
- 239000012530 fluid Substances 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 9
- 150000002978 peroxides Chemical class 0.000 claims description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- 229920002907 Guar gum Polymers 0.000 claims description 2
- 235000000380 Nyssa aquatica Nutrition 0.000 claims description 2
- 239000000665 guar gum Substances 0.000 claims description 2
- 229960002154 guar gum Drugs 0.000 claims description 2
- 235000010417 guar gum Nutrition 0.000 claims description 2
- 229960002163 hydrogen peroxide Drugs 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 125000002081 peroxide group Chemical group 0.000 claims 1
- 229920000642 polymer Polymers 0.000 abstract description 12
- 239000002562 thickening agent Substances 0.000 abstract description 5
- 230000001590 oxidative effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000002775 capsule Substances 0.000 description 4
- 238000001802 infusion Methods 0.000 description 3
- 230000002028 premature Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- -1 peroxide Compound Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Detergent Compositions (AREA)
Abstract
The invention provides a kind of cleaning method in crosslinked polymer acid acid fracturing seam face, it is included in after the completion of main body acid fracturing and injects liquid oxidizer.This method can be widely applied to during acid fracturing make the gel breaking of the acid solution of thickening agent of polymer, it is possible to increase the cleaning scope in crack.
Description
Technical field
The invention belongs to oil-gas field development field, and in particular to a kind of cleaning treatment side in crosslinked polymer acid acid fracturing seam face
Method.
Background technology
Man-made fracture will obtain high flow conductivity, it is necessary to reduce injury of the entry well fluid to man-made fracture after acid fracturing.Mesh
Preceding acid fracturing uses the acid solution that viscous acid, frozen glue acid etc. make thickening agent of polymer, and the thickening agent in these acid fluid systems is generally difficult
With the row of returning that degrades, delay causes serious injury to man-made fracture in the earth formation.Qiu Xinnong in 2006 et al. reports a kind of new
Type polymer fracturing fluid gel breaker (HP types), this gel breaker are pumped into stratum simultaneously with polymer fracturing fluid, crosslinking can be effectively ensured
The degraded of polymer, but the viscosity temperature characteristic (Xinjiang petroleum science and technology, 2006,1 (6), 46-50) of polymer is also influenceed simultaneously.2003
Nian Liujia translates the new no gel breaker fracturing fluid technology for reporting a kind of U.S., and this system is referred to as low molecule amount fracturing fluid
(LMWF).Although its rheological property is stable during infusion, the original low glutinous of it is returned to soon after crack closure
Degree, but this liquid system can not keep high viscosity so as to reduce leak-off in high-temperature stratum, in the high leak-off carbonate rock of high temperature
Layer is inapplicable (Oilfields engineering, 2003,19 (7), 9-14).Li Qin in 2014 then reports the present broken glue of crosslinked polymer acid
The capsule breaker of generally use and the method for chelating agent, main method are while infusion viscous acid or frozen glue acid, inner
Face adds a certain proportion of capsule breaker mixing and is pumped into stratum.Into after stratum, double action of the capsule in high moderate pressure
Under discharge the oxidant for being wrapped in the inside, oxidant touches the macromolecular chain that polymer is interrupted after polymer, degraded.
(oil drilling technology, 2014,42 (5), 100-103).
Liquid system and the limitation of construction technology in the past is the fluid temperature meeting rapid increase during infusion,
Capsule can be broken quickly after stratum is entered, and discharge oxidant.And polymeric acid liquid system is after premature contact to oxidant
Liquid can be largely effected on the main performance such as to become sticky, be crosslinked, so as to allow main body acid solution lose itself drop filter, it is slow the features such as.
The content of the invention
For the situation of prior art, the invention provides a kind of cleaning treatment side in crosslinked polymer acid acid fracturing seam face
Method.The cleaning method is included in after the completion of main body acid fracturing, injects liquid oxidizer.
In the method for the present invention, liquid oxidizer can degrade injection of polymer moment in the presence of stratum high-temperature, and
And due to the characteristic of its high mobility, effectively expand sphere of action.The method of the present invention can effectively degrade the polymerization of injection
Thing thickening agent, but will not premature contact to main body acid solution, the characteristic to be become sticky so as to allow acid solution to lose.
According to the preferred embodiment of the present invention, the main acid briquetting includes：Acid fracturing prepad fluid is injected, and injection main body is handed over
Connection acid carries out acid fracturing.
According to the preferred embodiment of the present invention, the liquid oxidizer is peroxide solutions.Preferably, the peroxide
Compound solution is hydrogenperoxide steam generator.Preferably, the mass concentration of the peroxide solutions is 1%-30%.
According to the preferred embodiment of the present invention, the acid fracturing prepad fluid can be linear glue and/or frozen glue.Preferably,
The acid fracturing prepad fluid is selected from water and/or guar gum glue.
According to the preferred embodiment of the present invention, the main body cross-linked acid is selected from ground surface crosslinking acid.Preferably, the main body
Cross-linked acid is selected from viscous acid, frozen glue acid and becomes at least one of glactaric acid.
According to the preferred embodiment of the present invention, the discharge capacity of the injection liquid oxidizer is 5m3/min-10m3/ min, it is excellent
Elect 6m as3/min-10m3/min.The pump pressure of liquid oxidizer is injected preferably in more than 50Mpa, more preferably in more than 60Mpa, most
It is preferred that in more than 70Mpa.
According to the preferred embodiment of the present invention, in mass, the amount ratio of the liquid oxidizer and main body cross-linked acid
For 0.0001-0.005：1, preferably 0.001-0.005：1.
The beneficial effects of the invention are as follows：
1. after the completion of main body acid fracturing, liquid oxidizer is reinjected, avoids gel breaker and main body acid solution premature contact,
Prevent main body acid fluid system from losing the features such as drop of itself is filtered, be slow
2. the liquid oxidizer of injection, by the high fluidity of liquid, the contact surface of increase oxidant and injection of polymer
Product, improve fracture clean scope.
Embodiment
The present invention is described in detail with reference to embodiments, but the present invention is not limited by following embodiments.
Embodiment 1
Cross-linked acid acid fracturing is carried out for Xinjiang oil field well, it is as follows according to the construction infusion program that this method designs：
Table 1 becomes glactaric acid acid fracturing seam face cleaning infusion program
In the present embodiment, the liquid oxidizer used is 30wt% peroxide solutions, and the cross-linked acid used is change glactaric acid.
In mass, the amount ratio of liquid oxidizer and main body cross-linked acid is 0.002：1.
In the present invention, by the high fluidity of liquid oxidizer, the contact surface of oxidant and injection of polymer is added
Product, improve fracture clean scope.
The cleaning method in crosslinked polymer acid acid fracturing seam face provided by the invention can be widely applied to during acid fracturing
The gel breaking of the acid solution of thickening agent is made of polymer, it is possible to increase the cleaning scope in crack.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention, for those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms, all embodiments can not be exhaustive here, it is every to belong to this hair
Row of the obvious changes or variations that bright technical scheme is extended out still in protection scope of the present invention.
Claims (10)
1. a kind of cleaning method in crosslinked polymer acid acid fracturing seam face, it is included in after the completion of main body acid fracturing and injects liquid oxidatively
Agent.
2. according to the method for claim 1, it is characterised in that the main acid briquetting includes injection acid fracturing prepad fluid and injection
Main body cross-linked acid carries out acid fracturing.
3. method according to claim 1 or 2, it is characterised in that the liquid oxidizer is peroxide solutions.
4. according to the method for claim 3, it is characterised in that the peroxide solutions are hydrogenperoxide steam generator.
5. according to the method for claim 4, it is characterised in that the mass concentration of the peroxide solutions is 1-30%.
6. according to the method any one of claim 2-5, it is characterised in that the acid fracturing prepad fluid is selected from water and guar gum
Glue.
7. according to the method any one of claim 1-6, it is characterised in that the main body cross-linked acid be selected from frozen glue acid and
Become at least one of glactaric acid.
8. according to the method any one of claim 1-7, it is characterised in that it is described injection liquid oxidizer discharge capacity be
5m3/min-10m3/min。
9. according to the method any one of claim 2-7, it is characterised in that in mass, the liquid oxidizer with
The amount ratio of main body cross-linked acid is 0.0001-0.005：1, preferably 0.001-0.005：1.
10. according to the method any one of claim 1-7, it is characterised in that the pump pressure for injecting liquid oxidizer exists
More than 50Mpa, preferably in more than 60Mpa, more preferably in more than 70Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610832340.XA CN107841301A (en) | 2016-09-19 | 2016-09-19 | A kind of cleaning method in crosslinked polymer acid acid fracturing seam face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610832340.XA CN107841301A (en) | 2016-09-19 | 2016-09-19 | A kind of cleaning method in crosslinked polymer acid acid fracturing seam face |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107841301A true CN107841301A (en) | 2018-03-27 |
Family
ID=61657272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610832340.XA Pending CN107841301A (en) | 2016-09-19 | 2016-09-19 | A kind of cleaning method in crosslinked polymer acid acid fracturing seam face |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107841301A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004007905A1 (en) * | 2002-07-12 | 2004-01-22 | Cleansorb Limited | Process for treatment of underground reservoirs |
| US20080305971A1 (en) * | 2005-01-24 | 2008-12-11 | Leiming Li | Polysaccharide Treatment Fluid and Method of Treating A Subterranean Formation |
| CN103881673A (en) * | 2013-08-13 | 2014-06-25 | 中国石油化工股份有限公司 | Oxidized gel breaker for polymer injection well and preparation method of oxidized gen breaker |
| CN104989361A (en) * | 2015-07-13 | 2015-10-21 | 中国石油大学(北京) | Method for auxiliary horizontal well artificial fracture direction change transformation |
| CN105089603A (en) * | 2015-07-13 | 2015-11-25 | 中国石油大学(北京) | Reservoir modifying method through forming crack network by temporary plugging turning in cracks |
| CN105257272A (en) * | 2015-09-24 | 2016-01-20 | 中国石油化工股份有限公司 | High-flow-conductivity acid fracturing method for carbonate rock reservoirs |
-
2016
- 2016-09-19 CN CN201610832340.XA patent/CN107841301A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004007905A1 (en) * | 2002-07-12 | 2004-01-22 | Cleansorb Limited | Process for treatment of underground reservoirs |
| US20080305971A1 (en) * | 2005-01-24 | 2008-12-11 | Leiming Li | Polysaccharide Treatment Fluid and Method of Treating A Subterranean Formation |
| CN103881673A (en) * | 2013-08-13 | 2014-06-25 | 中国石油化工股份有限公司 | Oxidized gel breaker for polymer injection well and preparation method of oxidized gen breaker |
| CN104989361A (en) * | 2015-07-13 | 2015-10-21 | 中国石油大学(北京) | Method for auxiliary horizontal well artificial fracture direction change transformation |
| CN105089603A (en) * | 2015-07-13 | 2015-11-25 | 中国石油大学(北京) | Reservoir modifying method through forming crack network by temporary plugging turning in cracks |
| CN105257272A (en) * | 2015-09-24 | 2016-01-20 | 中国石油化工股份有限公司 | High-flow-conductivity acid fracturing method for carbonate rock reservoirs |
Non-Patent Citations (1)
| Title |
|---|
| 长庆石油勘探局科委 编译: "《低渗透油气藏》", 30 April 1988, 甘肃科学技术出版社 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20180327 |