CN104910883A - Delayed crosslinked chromium gel profile control plugging agent - Google Patents
Delayed crosslinked chromium gel profile control plugging agent Download PDFInfo
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- CN104910883A CN104910883A CN201510376672.7A CN201510376672A CN104910883A CN 104910883 A CN104910883 A CN 104910883A CN 201510376672 A CN201510376672 A CN 201510376672A CN 104910883 A CN104910883 A CN 104910883A
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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
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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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
- C09K8/5045—Compositions based on water or polar solvents containing inorganic 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
- 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
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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Abstract
The invention relates to a delayed crosslinked chromium gel profile control plugging agent, belonging to the technical field of oilfield profile control plugging. The delayed crosslinked chromium gel profile control plugging agent is formed by crosslinking partially hydrolyzed polyacrylamide and Cr<3+> generated by redox reaction. The delayed crosslinked chromium gel profile control plugging agent is composed of the following components in percentage by weight: 0.3-0.8% of partially hydrolyzed polyacrylamide, 0.02-0.20% of sodium dichromate, 0.15-0.50% of additive and the balance of water. Compared with the reported chromium gel, the delayed crosslinked chromium gel has the advantages of long gelling time, high heat stability and high gel strength. Under the optimal formula, the delayed crosslinked chromium gel has high plugging rate, favorable abrasion resistance and high practicality, and satisfies the demands for on-site construction.
Description
Technical field
The present invention relates to a kind of delay cross linking chromium gel profile-controlling and plugging agent, belong to profile control and water plugging technology field, oil field.
Background technology
Along with the exploitation in oil field, moisturely to rise year by year, interlayer, in layer, horizontal contradiction is increasing, and adjustment water injection profile is imperative.The research of profile-controlling and plugging agent is the link of crucial importance being related to profile control and water plugging success.If profile-controlling and plugging agent is selected unreasonable, not only can not high permeability formation that effectively shutoff is moisture, and likely injure stratum.For conventional oil reservoir, frozen glue amendment all has mass-producing product, and applying more is polyacrylamide gel amendment.The polyacrylamide gel amendment of chrominum cross-linkage is a kind of selective profile control plugging agent, there is construction safety, the advantage that site operation experience is many, but it has gelling temperature, and susceptibility is high, the shortcoming of poor heat stability, therefore, be badly in need of exploitation one and place heatproof for a long time, salt tolerant and thermally-stabilised good delayed crosslinked chromium gel amendment.
Delay cross linking chromium gel mainly contains the acrylamide of partial hydrolysis, linking agent and reductive agent composition.Wherein add sexavalent chrome (linking agent) salt in a polymer solution, under the effect of reductive agent, be reduced into trivalent chromic ion, trivalent chromic ion forms polynuclear hydroxy bridge complex ion by hydrolysis, and polynuclear hydroxy bridge complex ion and crosslinked polymer form frozen glue.Under normal circumstances, this system rate of crosslinking is too fast, and the thermally-stabilised difference of chromium gel after crosslinked, easily occurs that bleed breaks glue, can not meet site operation requirement.Under special conditions (high temperature, high salt and water conditioner etc.) condition under, need to add additive to suppress the plastic speed of frozen glue.
Zhao Fulin etc. are published in the improvement of the 2nd phase in 1998 " East China Petroleum Institute's journal " upper Cheng Dong oil field chromium gel blocking agent, by adding pH depressant and intensity stiffeners, the chromium gel gelation time after improvement is extended to some extent, but gelation time are no more than 8h.Lin Weimin etc. be published in the 25th volume supplementary issue in 2003 (under) in organic chrome cross linker partially hydrolyzed polyacrylamide gel deep profile controlling experiment on " Jianghan Petroleum College's journal ", by adding pH adjusting agent, stablizer, retardant has done some to organic chromium Gelling Plugging Agent performance to be improved, but the auxiliary agent added is too many, improves construction cost and operation easier.
Because redox reaction in chromium gel blocking agent generates Cr
3+generate very fast, gelation time is shorter, and oxygenant residual in addition has stronger oxygenizement to frozen glue, and along with the prolongation of time, obvious dehydrating phenomena appears in frozen glue.Be necessary to be improved this frozen glue profile control system.
Summary of the invention
The present invention is the deficiency in order to overcome in existing production technology, provides a kind of delay cross linking chromium gel profile-controlling and plugging agent.Heat stability is good of the present invention, gelation time are adjustable, gel strength is high, and at 80 DEG C, its temperature tolerance is good, within 120 days, do not dewater.
For achieving the above object, the technical solution used in the present invention is: a kind of delay cross linking chromium gel profile-controlling and plugging agent, has the Cr that partially hydrolyzed polyacrylamide and redox reaction produce
3+be cross-linked to form, it is made up of following weight percent: partially hydrolyzed polyacrylamide 0.3 ~ 0.8%, sodium dichromate 99 0.02 ~ 0.20%, additive 0.15 ~ 0.50%, surplus are water.
As preferably, described partially hydrolyzed polyacrylamide is anion-polyacrylamide.
As preferably, the molecular weight 5,000,000 ~ 1,600 ten thousand of described anion-polyacrylamide, degree of hydrolysis 4% ~ 20%, solid content > 90%.
As preferably, described additive is two or more the mixing arbitrarily of S-WAT, sodium bisulfite, Sodium Hydrosulphite, Sulfothiorine, thiocarbamide, mphenylenediamine.
The preparation of a kind of delay cross linking chromium gel of the present invention profile-controlling and plugging agent, its concrete steps are as follows: the Simulated Water of (1) preparation NaCl solution; (2) in step (1) Simulated Water, add additive and the partially hydrolyzed polyacrylamide of certain mass ratio, stirring at room temperature 2 ~ 3h, dissolves completely to partially hydrolyzed polyacrylamide; (3) in step (2), add the sodium dichromate 99 of certain mass ratio, agitator stirs, mixes, and obtains delay cross linking chromium gel profile-controlling and plugging agent.
Beneficial effect of the present invention: (1), compared with the chromium gel reported, the gelation time of delay cross linking chromium gel of the present invention is long, and Heat stability is good, gel strength is high.(2) under best screening formulation, delay cross linking chromium gel of the present invention stifled rate in rock core test is large, and abrasion resistance is good, and meet the demand of site operation, practicality is larger.
Embodiment
Below by way of specific specific examples, technical scheme of the present invention is described.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.And, except as otherwise noted, the numbering of various method steps is only the convenient tool differentiating various method steps, but not be ordering or the enforceable scope of restriction the present invention of restriction various method steps, the change of its relativeness or adjustment, when changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Embodiment 1
Be in the NaCl aqueous solution of 10000mg/L in 100g salinity, add the anionic polyacrylamide of 0.08g Sulfothiorine, 0.15g thiocarbamide, 0.5g molecular weight 1,200 ten thousand, stir after 2-3h dissolves completely to anionic polyacrylamide under normal temperature, after the sodium dichromate 99 then adding 0.10g stirs, namely obtain delay cross linking frozen glue profile-controlling and plugging agent.This profile-controlling and plugging agent is gelation time 18h at 80 DEG C, gel strength 0.070MPa.Embodiment 2
Be in the NaCl aqueous solution of 10000mg/L in 100g salinity, add the anionic polyacrylamide of 0.06 S-WAT, 0.01g mphenylenediamine, 0.10g thiocarbamide and 0.6g molecular weight 8,000,000, stir after 2-3h dissolves completely to anionic polyacrylamide under normal temperature, after the sodium dichromate 99 then adding 0.10g stirs, namely obtain delay cross linking frozen glue profile-controlling and plugging agent.This profile-controlling and plugging agent system gelation time 23h at 80 DEG C, gel strength 0.064MPa.
Embodiment 3
Be in the NaCl aqueous solution of 10000mg/L in 100g salinity, add 0.10g Sodium Hydrosulphite, 0.02g mphenylenediamine, 0.02g S-WAT, 0.45g molecular weight 1,000 ten thousand anionic polyacrylamide, stir after 2-3h dissolves completely to polyacrylamide under normal temperature, then add after 0.08g sodium dichromate 99 stirs and namely obtain delay cross linking frozen glue profile-controlling and plugging agent.This profile control and water plugging system gelation time 26h at 80 DEG C, gel strength 0.074MPa.
Embodiment 4
Be in the NaCl aqueous solution of 10000mg/L in 100g salinity, add the anionic polyacrylamide of 0.04 sodium bisulfite, 0.12g thiocarbamide, 0.02 S-WAT and 0.4g molecular weight 1,200 ten thousand, stir after 2-3h dissolves completely to anionic polyacrylamide under normal temperature, after the sodium dichromate 99 then adding 0.12g stirs, namely obtain delay cross linking frozen glue profile-controlling and plugging agent.This blocking agent system 20h, gel strength 0.080MPa during gelation at 80 DEG C.
Embodiment 5
Be in the NaCl aqueous solution of 10000mg/L in 100g salinity, add the anionic polyacrylamide of 0.04 Sulfothiorine, 0.04g sodium pyrosulfate, 0.15g thiocarbamide, 0.6g molecular weight 1,000 ten thousand, stir after 2-3h dissolves completely to anionic polyacrylamide under normal temperature, after the sodium dichromate 99 then adding 0.08g stirs, namely obtain delay cross linking frozen glue profile-controlling and plugging agent.This blocking agent system 22h, gel strength 0.066MPa during gelation at 80 DEG C.
Embodiment 6
Be in the NaCl aqueous solution of 10000mg/L in 100g salinity, the anionic polyacrylamide of 0.03 Sodium Hydrosulphite, 0.04g sodium pyrosulfate, 0.01g mphenylenediamine, 0.7g molecular weight 5,000,000, stir after 2-3h dissolves completely to anionic polyacrylamide under normal temperature, after the sodium dichromate 99 then adding 0.08g stirs, namely obtain delay cross linking frozen glue profile-controlling and plugging agent.This blocking agent system 26h, gel strength 0.064MPa during gelation at 80 DEG C.
Embodiment 7
Be in the NaCl aqueous solution of 10000mg/L in 100g salinity, add 0.02g S-WAT, 0.04g Sulfothiorine, the anionic polyacrylamide of 0.10g thiocarbamide and 0.5g molecular weight 1,200 ten thousand, stir after 2-3h dissolves completely to anionic polyacrylamide under normal temperature, after the sodium dichromate 99 then adding 0.15g stirs, namely obtain delay cross linking frozen glue profile-controlling and plugging agent.This blocking agent system 19h, gel strength 0.078MPa during gelation at 80 DEG C.
Embodiment 8
Be in the NaCl aqueous solution of 20000mg/L in 100g salinity, add 0.06g S-WAT, the anionic polyacrylamide of 0.02g sodium bisulfite, 0.12g thiocarbamide, 0.03g mphenylenediamine and 0.4g molecular weight 1,600 ten thousand, stir after 2-3h dissolves completely to anionic polyacrylamide under normal temperature, after the sodium dichromate 99 then adding 0.15g stirs, namely obtain delay cross linking frozen glue profile-controlling and plugging agent.This blocking agent system 16h, gel strength 0.080MPa during gelation at 80 DEG C.
Embodiment 9
Testing inspection:
(1) heat stability testing of delay cross linking frozen glue profile-controlling and plugging agent frozen glue
The delay cross linking frozen glue profile-controlling and plugging agent above embodiment 1 ~ 8 prepared, numbering 1 ~ 8, injects the sealing of ampoule sintering, puts into 80 DEG C of thermostatic drying chambers, observe the thermostability (table 1) that frozen glue is long-term.
Table 1 frozen glue heat stability testing
As seen from the above table, 80d placed by the delayed crosslinked frozen glue of embodiment 1 ~ 8, and dehydrating amount is 0.When arriving 120d, dehydrating amount is only 0.15%.Draw thus, the present invention dewaters hardly, has good heat resistance.
(2) shut-off capacity of delay cross linking frozen glue profile-controlling and plugging agent frozen glue
Preparation embodiment 1 ~ 4 delay cross linking frozen glue profile-controlling and plugging agent, crosslinked gel profile-controlling and plugging agent to be delayed after gelation, uses the reservoir core plugging rate of this frozen glue of single tube model determination in rock core.Experimental result is as shown in table 2.
The shut-off capacity of delay cross linking chromium gel under table 2 different ingredients
Experimental result shows: the highest 0.56Kw that is also only of rate of permeation before embodiment 1 ~ 4 is stifled, sealing ratiod is minimum is 97.5%, up to 98.2%, draws thus, and delay cross linking chromium gel plugging strength of the present invention is high, meets the requirement of profile control and water plugging to shut-off capacity.
(3) delay cross linking frozen glue profile-controlling and plugging agent frozen glue resistance to erosion test evaluation of the present invention
Delay cross linking frozen glue profile-controlling and plugging agent frozen glue is lasting abrasion resistance in rock core, is finally related to the quality of water plugging and profile controlling effect.In his-and-hers watches 2, the fill out sand tube of embodiment 1 carries out the scouring experiment of the water of 20 times of volume of voids, along with the increase of water drive amount, the sealing ratiod of amendment to rock core slightly declines, and still remains on more than 95%, illustrate that this profile-controlling and plugging agent has good resistance to erosion ability after the washing away of 20 times of volume of voids.
Although be described preferred embodiment of the present invention above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make a lot of form, these all belong within protection scope of the present invention.
Claims (5)
1. a delay cross linking chromium gel profile-controlling and plugging agent, is characterized in that: the Cr produced by partially hydrolyzed polyacrylamide and redox reaction
3+be cross-linked to form, be made up of following weight percent: partially hydrolyzed polyacrylamide 0.3 ~ 0.8%, sodium dichromate 99 0.02 ~ 0.20%, additive 0.15 ~ 0.50%, surplus are water.
2. a kind of delay cross linking chromium gel profile-controlling and plugging agent according to claim 1, is characterized in that: described partially hydrolyzed polyacrylamide is anion-polyacrylamide.
3. a kind of delay cross linking chromium gel profile-controlling and plugging agent according to claim 2, is characterized in that: the molecular weight 5,000,000 ~ 1,600 ten thousand of anion-polyacrylamide, degree of hydrolysis 4% ~ 20%, solid content > 90%.
4. a kind of delay cross linking chromium gel profile-controlling and plugging agent according to claim 1, is characterized in that: described additive is arbitrarily two or more the mixing of S-WAT, sodium bisulfite, Sodium Hydrosulphite, Sulfothiorine, thiocarbamide, mphenylenediamine.
5. according to the preparation of any described a kind of delay cross linking chromium gel profile-controlling and plugging agent of Claims 1-4, it is characterized in that: concrete steps are as follows: the Simulated Water of (1) preparation NaCl solution; (2) in step (1) Simulated Water, add additive and the partially hydrolyzed polyacrylamide of certain mass ratio, stirring at room temperature 2 ~ 3h, dissolves completely to partially hydrolyzed polyacrylamide; (3) in step (2), add the sodium dichromate 99 of certain mass ratio, agitator stirs, mixes, and obtains delay cross linking chromium gel profile-controlling and plugging agent.
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| CN201510376672.7A CN104910883A (en) | 2015-07-01 | 2015-07-01 | Delayed crosslinked chromium gel profile control plugging agent |
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| CN201510376672.7A CN104910883A (en) | 2015-07-01 | 2015-07-01 | Delayed crosslinked chromium gel profile control plugging agent |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548466A (en) * | 2015-12-07 | 2016-05-04 | 中国石油天然气股份有限公司 | Method for evaluating influence of chromium ion loss in cracks on gel plugging effect |
| CN106566502A (en) * | 2016-11-04 | 2017-04-19 | 中国石油天然气股份有限公司 | Low-initial-viscosity controllable gel profile control agent |
| CN106590559A (en) * | 2016-12-02 | 2017-04-26 | 长江大学 | Thickened oil thermal production channel blocking nano-composite gel |
| CN108753270A (en) * | 2018-06-16 | 2018-11-06 | 国电东北环保产业集团有限公司华盈环保材料分公司 | Shallow calling LOW PERMEABILITY RESERVOIR water plugging profile control agent of one kind and preparation method thereof |
| CN109679602A (en) * | 2017-10-19 | 2019-04-26 | 中国石油化工股份有限公司 | A kind of frozen glue profile-controlling and plugging agent and preparation method thereof |
| CN111892918A (en) * | 2020-08-27 | 2020-11-06 | 胜利油田盛嘉化工有限责任公司 | Jelly water shutoff profile control agent and preparation method thereof |
| CN112201316A (en) * | 2020-09-10 | 2021-01-08 | 中国石油天然气股份有限公司 | Dynamic gelling strength quantitative selection method of chromium jelly for deep profile control of oil field |
| CN116218495A (en) * | 2021-12-06 | 2023-06-06 | 中国石油天然气股份有限公司 | Delay crosslinking type deep profile control agent and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1661555A2 (en) * | 2004-11-29 | 2006-05-31 | Texas United Chemical Company, LLC. | Method of delaying the setting time of crosslinked lost circulation control pills |
| CN1827730A (en) * | 2006-04-08 | 2006-09-06 | 盘锦市庆联油田工程技术服务有限公司 | Automatically-crushed remigration particle gel profile-control and water-shutoff agent |
| CN102504777A (en) * | 2011-10-14 | 2012-06-20 | 中国石油天然气集团公司 | Delaying cross-linking polymer hard-gel in-depth profile controlling agent and preparation method thereof |
| CN103694977A (en) * | 2013-11-26 | 2014-04-02 | 辽河石油勘探局 | Anti-shearing crosslinking-delayed organic profile control agent |
-
2015
- 2015-07-01 CN CN201510376672.7A patent/CN104910883A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1661555A2 (en) * | 2004-11-29 | 2006-05-31 | Texas United Chemical Company, LLC. | Method of delaying the setting time of crosslinked lost circulation control pills |
| CN1827730A (en) * | 2006-04-08 | 2006-09-06 | 盘锦市庆联油田工程技术服务有限公司 | Automatically-crushed remigration particle gel profile-control and water-shutoff agent |
| CN102504777A (en) * | 2011-10-14 | 2012-06-20 | 中国石油天然气集团公司 | Delaying cross-linking polymer hard-gel in-depth profile controlling agent and preparation method thereof |
| CN103694977A (en) * | 2013-11-26 | 2014-04-02 | 辽河石油勘探局 | Anti-shearing crosslinking-delayed organic profile control agent |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548466A (en) * | 2015-12-07 | 2016-05-04 | 中国石油天然气股份有限公司 | Method for evaluating influence of chromium ion loss in cracks on gel plugging effect |
| CN106566502A (en) * | 2016-11-04 | 2017-04-19 | 中国石油天然气股份有限公司 | Low-initial-viscosity controllable gel profile control agent |
| CN106590559A (en) * | 2016-12-02 | 2017-04-26 | 长江大学 | Thickened oil thermal production channel blocking nano-composite gel |
| CN106590559B (en) * | 2016-12-02 | 2019-05-17 | 长江大学 | The nano combined frozen glue of heavy oil thermal recovery fleeing proof |
| CN109679602A (en) * | 2017-10-19 | 2019-04-26 | 中国石油化工股份有限公司 | A kind of frozen glue profile-controlling and plugging agent and preparation method thereof |
| CN108753270A (en) * | 2018-06-16 | 2018-11-06 | 国电东北环保产业集团有限公司华盈环保材料分公司 | Shallow calling LOW PERMEABILITY RESERVOIR water plugging profile control agent of one kind and preparation method thereof |
| CN111892918A (en) * | 2020-08-27 | 2020-11-06 | 胜利油田盛嘉化工有限责任公司 | Jelly water shutoff profile control agent and preparation method thereof |
| CN112201316A (en) * | 2020-09-10 | 2021-01-08 | 中国石油天然气股份有限公司 | Dynamic gelling strength quantitative selection method of chromium jelly for deep profile control of oil field |
| CN112201316B (en) * | 2020-09-10 | 2024-01-30 | 中国石油天然气股份有限公司 | Dynamic gel forming strength quantitative selection method for chromium gel for deep profile control of oil field |
| CN116218495A (en) * | 2021-12-06 | 2023-06-06 | 中国石油天然气股份有限公司 | Delay crosslinking type deep profile control agent and preparation method thereof |
| CN116218495B (en) * | 2021-12-06 | 2024-06-07 | 中国石油天然气股份有限公司 | Delay crosslinking type deep profile control agent and preparation method thereof |
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Application publication date: 20150916 |