CN104342092A - High-oil-content foam well repairing and killing fluid - Google Patents
High-oil-content foam well repairing and killing fluid Download PDFInfo
- Publication number
- CN104342092A CN104342092A CN201310334253.8A CN201310334253A CN104342092A CN 104342092 A CN104342092 A CN 104342092A CN 201310334253 A CN201310334253 A CN 201310334253A CN 104342092 A CN104342092 A CN 104342092A
- Authority
- CN
- China
- Prior art keywords
- well
- control fluid
- oil
- killing fluid
- water
- 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
- 239000012530 fluid Substances 0.000 title claims abstract description 45
- 239000006260 foam Substances 0.000 title abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000010779 crude oil Substances 0.000 claims abstract description 17
- 239000003112 inhibitor Substances 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 10
- 229920002401 polyacrylamide Polymers 0.000 claims description 10
- 239000001103 potassium chloride Substances 0.000 claims description 10
- 235000011164 potassium chloride Nutrition 0.000 claims description 10
- 239000000230 xanthan gum Substances 0.000 claims description 10
- 229920001285 xanthan gum Polymers 0.000 claims description 10
- 229940082509 xanthan gum Drugs 0.000 claims description 10
- 235000010493 xanthan gum Nutrition 0.000 claims description 10
- 230000008719 thickening Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 239000004088 foaming agent Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 101100004280 Caenorhabditis elegans best-2 gene Proteins 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000012266 salt solution 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/428—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for squeeze cementing, e.g. for repairing
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/536—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning characterised by their form or by the form of their components, e.g. encapsulated material
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Cosmetics (AREA)
Abstract
The invention relates to a high oil-content foam well repairing and killing fluid; the contents of all components are as follows by mass percent: 0.14-0.25% of a tackifying inhibitor; 0.12-0.14% of flow pattern regulator; 30-50% of crude oil; 1.8-2.5% of an oil-water compatible foaming agent, and the balance of water; the density range of the well repairing and killing fluid is 0.36-0.50g/cm3Compared with the conventional well repairing and killing fluid, the well repairing and killing fluid is much lower, is very effective in preventing and stopping leakage of low-pressure easily-leaked stratum, reduces surface tension of foam formed by crude oil and water, improves compatibility of the well killing fluid and a reservoir stratum, and has a good effect of protecting the reservoir stratum.
Description
Technical field
The present invention relates to a kind of high containing oil whip well workover well control fluid, belong to oil-gas field development technical field.
Background technology
The normal mode equilibrium strata pressure adopted at pit shaft injection well control fluid in workover treatment, domestic a large amount of aq. type well workover well control fluid adopted at present mainly contains two classes, one class has solid phase, one class Solid Free, there is the well workover well control fluid solid phase of solid phase large to reservoir damage, the well workover well control fluid of Solid Free is mainly local water or salt solution, this type of well control fluid free water enters reservoir and easily causes water blocking damage, after causing workover treatment to terminate operation, the row's of returning time is long, and above two class well workover well killing fluid density are all greater than 1.00g/cm
3, miss in Well Killing Process seriously for low pressure well, these have all had a strong impact on oily well yield.China Patent No. 201010115449.4 is called that the well killing fluid density that " a kind of low-density water bonding well control fluid " is announced is 1.00g/cm
3-1.01g/cm
3, substantially solve the reservoir water blocking damage that free water invaded formation causes, but density is higher, the problem of low pressure well leakage can not be solved.If the density of well workover well control fluid can be reduced, the Water-blocking damage that free water causes reservoir can be reduced again, just effectively can solve the kill-job problem in low pressure well well workover process.The high oil whip that contains can overcome the above problems as well control fluid, and its density is minimum to 0.36g/cm
3.
Summary of the invention
The object of this invention is to provide a kind of height containing oil whip well workover well control fluid, foam is gas-liquid two-phase stable foam, and aerated fluid Crude Oil weight ratio can reach 50%, and the more conventional water base well workover well control fluid of density is low, and foam density is minimum to 0.36g/cm
3, foam significantly can reduce the water blocking damage of free water to reservoir, effectively can solve low pressure well leakage problem, available protecting reservoir simultaneously.
Of the present invention a kind of high containing oil whip well workover well control fluid:
Composition:
Thickening inhibitor: polyacrylamide sylvite, mass percent concentration is 0.14 ~ 0.25%; Best 0.2%;
Flow pattern regulator: xanthan gum, mass percent concentration is 0.12 ~ 0.14%; Best 0.14%;
Crude oil: light crude, mass percent concentration is 30% ~ 50%; Best 40%;
Whipping agent: profit compatible type whipping agent, mass percent concentration is 1.8% ~ 2.5%; Best 2%;
All the other are water.
In above-mentioned well workover well control fluid, described thickening inhibitor is polyacrylamide sylvite, code name K-PAM, and number-average molecular weight is 5 × 106g/mol;
In above-mentioned well workover well control fluid, described flow pattern regulator is xanthan gum, code name XC, and number-average molecular weight is 2 × 107g/mol;
Described in above-mentioned well workover well control fluid, crude oil is light crude;
In above-mentioned well workover well control fluid, described whipping agent is profit compatible type whipping agent DRfoam-II.
Preparation requires:
Provided by the invention a kind of high containing oil whip well workover well control fluid, foam is gas-liquid two-phase stable foam, aerated fluid Crude Oil weight ratio can reach 50%, thickening inhibitor need be added under agitation and flow pattern regulator is mixed with the aqueous solution during preparation, continue to stir 2-3h, leave standstill aquation 24h, then be mixed into certain crude oil and whipping agent, under stirring at low speed condition by the aqueous solution and crude oil fully emulsified, issue brewed Spume Well Killing Liquid in high-speed stirring condition.
The invention provides a kind of high containing oil whip well workover well control fluid, wherein said oil is light crude, and foam well workover well killing fluid density scope is at 0.36-0.50g/cm
3between, and conventional water base well killing fluid density is all greater than 1.00g/cm
3, see thus, high more much lower than conventional Well Killing liquid containing oil whip well workover well killing fluid density; very effective to the leak-proof leak-stopping of low pressure and leakmess formation; the foam that crude oil and water are formed reduces surface tension, improves the compatibility of well control fluid and reservoir, has good effect to protection reservoir.
Embodiment
In the following embodiment of the present invention, experimental technique if no special instructions, is ordinary method.
Material therefor, reagent etc. in the following embodiment of the present invention, if no special instructions, all obtain by commercial sources.
Polyacrylamide sylvite in the following embodiment of the present invention is bought in Xinxiang, Henan Zhenhua well workover well control fluid Materials Co., Ltd.
Xanthan gum in the following embodiment of the present invention is bought in the biological company limited of Shandong Zhong Xuan.
Profit compatible type whipping agent in the following embodiment of the present invention is provided by China Petroleum Group Drilling Engineering Technology Research Institute.
Light crude in the following embodiment of the present invention is provided by TulufanHami oil field Turfan oil recovery factory.
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1, crude oil weight percent is the foam well workover well control fluid of 30%.
Formula one: water 100g+ polyacrylamide sylvite 0.3g+ xanthan gum 0.2g
Formula two: formula one+crude oil 45g+ profit compatible type whipping agent DRfoam-II 3.2g
Formula two foams under suitable foaming condition.
Obtained high containing oil whip well workover well control fluid by above step, each component concentration is mass percent: polyacrylamide sylvite 0.2%; Xanthan gum 0.13%; Light crude 30%; Profit compatible type whipping agent DRfoam-II 2.2%; All the other are water; Foam density is 0.36g/cm
3.
Embodiment 2, crude oil weight percent is the foam well workover well control fluid of 40%.
Formula one: water 100g+ polyacrylamide sylvite 0.4g+ xanthan gum 0.2g
Formula two: formula one+crude oil 70g+ profit compatible type whipping agent DRfoam-II 3.5g
Formula two foams under suitable foaming condition.
Obtained high containing oil whip well workover well control fluid by above step, each component concentration is mass percent: polyacrylamide sylvite 0.23%; Xanthan gum 0.12%; Light crude 40.21%; Profit compatible type whipping agent DRfoam-II 2%; All the other are water; Foam density is 0.39g/cm
3.
Embodiment 3, crude oil weight percent is the foam well workover well control fluid of 50%.
Formula one: water 100g+ polyacrylamide sylvite 0.3g+ xanthan gum 0.3g
Formula two: formula one+crude oil 70g+ profit compatible type whipping agent DRfoam-II 4g
Formula two foams under suitable foaming condition.
Obtained high containing oil whip well workover well control fluid by above step, each component concentration is mass percent: polyacrylamide sylvite 0.14%; Xanthan gum 0.14%; Light crude 49.69%; Profit compatible type whipping agent DRfoam-II 1.9%; All the other are water; Foam density is 0.45g/cm
3.
Claims (5)
1. high containing an oil whip well workover well control fluid, it is characterized in that: each component concentration is mass percent: thickening inhibitor 0.14 ~ 0.25%; Flow pattern regulator 0.12 ~ 0.14%; Crude oil 30 ~ 50%; Profit compatible type whipping agent 1.8 ~ 2.5%, all the other are water.
2. high containing oil whip well workover well control fluid according to claim 1, it is characterized in that: described thickening inhibitor is polyacrylamide sylvite.
3. high containing oil whip well workover well control fluid according to claim 1, it is characterized in that: described flow pattern regulator is xanthan gum.
4. high containing oil whip well workover well control fluid according to claim 1, it is characterized in that: described whipping agent is profit compatible type whipping agent DRfoam-II.
5. high containing oil whip well workover well control fluid according to claim 1, it is characterized in that: described crude oil is light crude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310334253.8A CN104342092A (en) | 2013-08-02 | 2013-08-02 | High-oil-content foam well repairing and killing fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310334253.8A CN104342092A (en) | 2013-08-02 | 2013-08-02 | High-oil-content foam well repairing and killing fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104342092A true CN104342092A (en) | 2015-02-11 |
Family
ID=52498568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310334253.8A Pending CN104342092A (en) | 2013-08-02 | 2013-08-02 | High-oil-content foam well repairing and killing fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104342092A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359418A (en) * | 2017-04-21 | 2018-08-03 | 克拉玛依市广海环境治理有限责任公司 | Oilfield oil well well workover Solid Free Weak Gels well killing fluid |
| CN114517081A (en) * | 2020-11-19 | 2022-05-20 | 中石化石油工程技术服务有限公司 | Micro-bubble workover fluid and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613595B (en) * | 2009-07-28 | 2012-05-16 | 大庆石油管理局 | Micro-foam drilling fluid |
| WO2012134953A1 (en) * | 2011-03-30 | 2012-10-04 | Coil Chem, L.L.C | Completion fluid with friction reduction |
| CN102952529A (en) * | 2011-08-30 | 2013-03-06 | 中国石油化工股份有限公司 | Solid-phase-free water-based microbubble drilling fluid |
| CN103031119A (en) * | 2011-09-29 | 2013-04-10 | 中国石油化工股份有限公司 | Sulfonate-containing anionic/nonionic surfactant composition and preparation method |
-
2013
- 2013-08-02 CN CN201310334253.8A patent/CN104342092A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613595B (en) * | 2009-07-28 | 2012-05-16 | 大庆石油管理局 | Micro-foam drilling fluid |
| WO2012134953A1 (en) * | 2011-03-30 | 2012-10-04 | Coil Chem, L.L.C | Completion fluid with friction reduction |
| CN102952529A (en) * | 2011-08-30 | 2013-03-06 | 中国石油化工股份有限公司 | Solid-phase-free water-based microbubble drilling fluid |
| CN103031119A (en) * | 2011-09-29 | 2013-04-10 | 中国石油化工股份有限公司 | Sulfonate-containing anionic/nonionic surfactant composition and preparation method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359418A (en) * | 2017-04-21 | 2018-08-03 | 克拉玛依市广海环境治理有限责任公司 | Oilfield oil well well workover Solid Free Weak Gels well killing fluid |
| CN114517081A (en) * | 2020-11-19 | 2022-05-20 | 中石化石油工程技术服务有限公司 | Micro-bubble workover fluid and preparation method thereof |
| CN114517081B (en) * | 2020-11-19 | 2023-10-13 | 中石化石油工程技术服务有限公司 | Microbubble workover fluid and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150211 |