CN110551489A - permeable solidification front liquid system and preparation method thereof - Google Patents
permeable solidification front liquid system and preparation method thereof Download PDFInfo
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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
- C09K8/40—Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to a permeable solidification front liquid system and a preparation method thereof, belonging to the technical field of oil and gas field well drilling and cementing; the permeable curing pad fluid system can comprise the following components in parts by weight: 100 parts of water, 0.2-1 part of pH regulator, 1-3 parts of suspension stabilizer, 0.2-4 parts of penetration curing agent, 0-1 part of anti-pollution agent and 0-140 parts of density regulator; the permeable solidification pad fluid system can effectively permeate and solidify mud cakes which are not replaced, the interface cementation strength is improved, the well cementation quality is improved, the compressive strength of the mixed components is high, the requirements of subsequent construction operation can be met, and the permeable solidification pad fluid system has wide popularization and application prospects.
Description
Technical Field
The invention relates to the technical field of oil and gas field well drilling and cementing, in particular to a permeable solidification front liquid system and a preparation method thereof.
Background
in the well drilling process, the drilling fluid forms a virtual mud skin and a compacted non-permeable mud cake layer on the annular interface, the cement slurry is difficult to completely replace the drilling fluid virtual mud skin on the annular interface in the well cementation process, and the incomplete displacement of the mud cake compacted on the second interface can cause poor cementation between a cement sheath and the second interface. Due to the low permeability and the non-curable characteristic of the interface mud cake, after cement slurry is hydrated, drying shrinkage is generated on a cementing surface, a micro annular space is formed to influence interlayer packing, and the gas well can cause annular gas channeling and well head pressure, and can seriously cause the abandonment of a natural gas well. How to improve the cementing quality of the cement sheath interface, enhance the sealing capability of the cement sheath and prevent oil gas water channeling is a technical problem which is always researched but not completely solved in the well cementation industry.
chinese patent with publication number CN104910881A provides a supercritical carbon dioxide completion fluid, which relates to a supercritical carbon dioxide completion fluid, and is formed by mixing a preposed isolation fluid, a supercritical carbon dioxide flushing fluid and a postposed isolation fluid according to the volume ratio of 2-5: 100: 1-5.
chinese patent publication No. CN101857799A discloses a curable spacer fluid for plugging and a preparation method thereof, wherein slag is used as a curing agent, bentonite is used as a suspending agent, and an alkaline substance is used as an activator, and the curable spacer fluid is mainly used for plugging cracks by the curing agent, and is mainly used for plugging, the requirement on the resistance to pressure is not too high, but no evaluation is made for improving interfacial cementation.
3 3in the prior art documents (Li Zaoyuan, Wulongfei, Zhang Xingguan and the like, Z35 block adjustment well curable spacer fluid technical research and application, oil drilling and production process, 2016,38(5): 606-.
Chinese patent with publication number CN104694095A provides a spacer fluid for a permeation selective plugging agent and a using method thereof, in particular to a spacer fluid for a permeation selective plugging agent, which is prepared from the following components in parts by weight: 1-5 parts of sodium hydroxide, 5-10 parts of sodium montmorillonite and 0.05-0.1 part of sodium hexametaphosphate are added into 100 parts of water. The spacer fluid for the permselective plugging agent is used for matching with the plugging agent, can effectively enhance the plugging effect of the plugging agent and prolong the plugging time, but the patent mainly relates to plugging and does not relate to permeating and curing mud cakes.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a permeable solidification pad fluid system, and particularly relates to a permeable solidification pad fluid system and a preparation method thereof. According to the permeable solidification pad fluid system, interface mud cakes and dead mud cakes which are difficult to displace are effectively washed through the permeation, the cementing quality of a cement sheath interface is improved, and annulus pressure caused by micro-gaps generated in the annulus is prevented. The pad fluid has good compatibility with cement slurry and slurry, and the compressive strength after mixing is high, thus meeting the requirements of subsequent construction operation.
One of the purposes of the invention is to provide a permeable solidification front liquid system which comprises the following components in parts by weight:
100 parts by weight of water, based on the total weight of the composition,
0.2 to 1 part by weight of a pH regulator, preferably 0.3 to 0.8 part by weight,
1 to 3 parts by weight of a suspension stabilizer, preferably 1 to 2.5 parts by weight,
0.2 to 4 parts by weight of a penetrating curing agent, preferably 0.5 to 3.5 parts by weight,
0 to 1 part by weight of an anti-staining agent,
0 to 140 parts by weight of a density modifier.
Most preferably, the penetrating curing pad fluid system may comprise the following components in parts by weight:
100 parts by weight of water, based on the total weight of the composition,
0.3 to 0.8 part by weight of a pH adjusting agent,
1 to 2.5 parts by weight of a suspension stabilizer,
0.5 to 3.5 parts by weight of a penetrating curing agent,
0 to 1 part by weight of an anti-staining agent,
0 to 140 parts by weight of a density modifier.
Wherein the content of the first and second substances,
the pH adjuster is preferably 0.4 to 0.8 part by weight, and more preferably 0.4 to 0.6 part by weight; the suspension stabilizer can be selected from 1 to 2.0 parts by weight, preferably 1 to 1.8 parts by weight, more preferably 1.2 to 1.8 parts by weight, and even more preferably 1.2 to 1.6 parts by weight;
1-3 parts by weight of the penetrating curing agent can be selected, preferably 1-2.6 parts by weight, and more preferably 1-1.4 parts by weight; the anti-fouling agent is preferably 0.2 to 0.8 part by weight, and more preferably 0.2 to 0.4 part by weight.
The water can be selected from fresh water or water with salt content less than 0.5 g/L.
the pH adjuster may be at least one of sodium carbonate, sodium hydroxide, and sodium silicate. The suspension stabilizer can be at least one selected from attapulgite, xanthan gum and carboxymethyl cellulose. The pH regulator mainly plays a role in activating and curing the penetrating curing agent; the suspension stabilizer plays a role in increasing the viscosity and suspension of the liquid-based slurry and has certain solidification characteristics under the action of the pH regulator.
The penetrating curing agent can be at least one of superfine silicon dioxide, calcium oxide or magnesium oxide.
The anti-fouling agent may be selected from at least one of boric acid, citric acid and phosphoric acid.
The density regulator can be selected from at least one of barite or iron ore powder for well cementation.
The superfine silicon dioxide in the penetrating curing agent is an inert substance, can penetrate into the curing cementing surface of the mud cake due to small particle size, and has a certain suspension effect in clear water due to low density under the superfine condition; at the same time, it can react with attapulgite, calcium oxide and magnesium oxide and the mud cake of the drilling fluid under the condition of a pH regulator, thereby generating a set body which is similar to set cement and has certain hydraulic activity.
Another object of the present invention is to provide a method for preparing the permeable solidification pad fluid system, which comprises the following steps:
Completely dissolving the suspension stabilizer and the pH regulator in the water according to the dosage under stirring, and stirring the solution (the solution can be stirred for about 1-6 hours) to prepare base slurry; and then, adding components including a penetration curing agent, an anti-pollution agent and a density regulator into the base slurry, and uniformly stirring to obtain the anti-pollution agent.
the preparation method is simple and easy to operate on site, and has no special requirements on equipment and working conditions.
The permeable solidification pad fluid system can effectively permeate and solidify mud cakes which are not replaced, the interface cementation strength is improved, the well cementation quality is improved, the compressive strength of the mixed components is high, the requirements of subsequent construction operation can be met, and the permeable solidification pad fluid system has wide popularization and application prospects.
compared with the prior art, the invention has the beneficial effects that:
(1) Improving the cementing quality of the cement sheath interface by permeating and curing the mud cakes which are not replaced;
(2) The compatibility with cement slurry, pad fluid and drilling fluid meets the requirements of well cementation construction;
(3) The penetrating curing agent not only has the function of penetrating and curing the mud cakes under the activation action of the pH regulator, but also has the effect of suspending;
(4) the compressive strength of the penetration curing pad fluid after being mixed and cured with cement slurry and mud can be more than 7Mpa at the temperature of 93 ℃ for 24 hours.
Detailed Description
The present invention will be further described with reference to the following examples. However, the present invention is not limited to these examples.
Example 1
weighing 500 parts by weight of fresh water, 3.5 parts by weight of attapulgite, 2 parts by weight of carboxymethyl cellulose, 1 part by weight of sodium carbonate, 3 parts by weight of sodium hydroxide, 5 parts by weight of superfine silica, 1 part by weight of calcium oxide, 2 parts by weight of magnesium oxide, 1 part by weight of boric acid and 25 parts by weight of barite. Completely dissolving the attapulgite, the carboxymethyl cellulose, the sodium carbonate and the sodium hydroxide in water according to the dosage under a stirring state, and stirring the solution for 2 hours to prepare base slurry; and then adding the superfine silicon dioxide, calcium oxide, magnesium oxide, boric acid and barite into the base slurry, and uniformly stirring to obtain the penetrating type solidification pad fluid system. The osmotic cured prefluid systems were evaluated according to the chemical compatibility of the test mixtures in the API specification and the oil well cement compressive strength test methods, and the results are shown in tables 1, 2 and 3, respectively.
example 2
weighing 500 parts by weight of fresh water, 3 parts by weight of attapulgite, 4 parts by weight of xanthan gum, 1 part by weight of sodium carbonate, 1 part by weight of sodium hydroxide, 10 parts by weight of superfine silicon dioxide, 2 parts by weight of calcium oxide, 1 part by weight of magnesium oxide, 1 part by weight of boric acid and 38 parts by weight of barite. Completely dissolving the attapulgite, the xanthan gum, the sodium carbonate and the sodium hydroxide in water according to the dosage under a stirring state, and stirring the solution for 3 hours to prepare base slurry; and then, adding superfine silicon dioxide, calcium oxide, magnesium oxide, boric acid and barite into the base slurry, and uniformly stirring to obtain the permeable solidification pad fluid system. The osmotic cured prefluid systems were evaluated according to the chemical compatibility of the test mixtures in the API specification and the oil well cement compressive strength test methods, and the results are shown in tables 1, 2 and 3, respectively.
Example 3
Weighing 500 parts by weight of fresh water, 2 parts by weight of xanthan gum, 4 parts by weight of carboxymethyl cellulose, 1 part by weight of sodium carbonate, 1 part by weight of sodium silicate, 5 parts by weight of superfine silicon dioxide, 4 parts by weight of calcium oxide, 1.5 parts by weight of citric acid and 56 parts by weight of iron ore powder. Dissolving the xanthan gum, the carboxymethyl cellulose, the sodium carbonate and the sodium silicate according to the dosage in fresh water under a stirring state, and stirring the solution for 2 hours to prepare base slurry; and then, adding superfine silicon dioxide, calcium oxide, citric acid and iron ore powder into the base slurry, and uniformly stirring to obtain the permeable solidification pad fluid system. The osmotic cured prefluid systems were evaluated according to the chemical compatibility of the test mixtures in the API specification and the oil well cement compressive strength test methods, and the results are shown in tables 1, 2 and 3, respectively.
example 4
Weighing 500 parts by weight of fresh water, 4 parts by weight of attapulgite, 4 parts by weight of xanthan gum, 1 part by weight of sodium silicate, 1 part by weight of sodium hydroxide, 5 parts by weight of superfine silicon dioxide, 4 parts by weight of magnesium oxide, 1.5 parts by weight of phosphoric acid and 75 parts by weight of iron ore powder. Completely dissolving the attapulgite, the xanthan gum, the sodium silicate and the sodium hydroxide in water according to the dosage under a stirring state, and stirring the solution for 3 hours to prepare base slurry; and then, adding superfine silicon dioxide, magnesium oxide, phosphoric acid and iron ore powder into the base slurry, and uniformly stirring to obtain the permeable solidification pad fluid system. The osmotic cured prefluid systems were evaluated according to the chemical compatibility of the test mixtures in the API specification and the oil well cement compressive strength test method, and the results are shown in tables 1, 2 and 3.
Example 5
Weighing 500 parts by weight of fresh water, 3 parts by weight of attapulgite, 2 parts by weight of xanthan gum, 1 part by weight of carboxymethyl cellulose, 1 part by weight of sodium carbonate, 1 part by weight of sodium silicate, 1 part by weight of sodium hydroxide, 3 parts by weight of superfine silicon dioxide, 1 part by weight of calcium oxide, 1 part by weight of magnesium oxide, 1 part by weight of phosphoric acid, 1 part by weight of boric acid and 90 parts by weight of density iron ore powder. Completely dissolving the attapulgite, xanthan gum, carboxymethyl cellulose, sodium carbonate, sodium silicate and sodium hydroxide in water according to the dosage under a stirring state, and stirring the solution for 4 hours to prepare base slurry; and then, adding superfine silicon dioxide, calcium oxide, magnesium oxide, phosphoric acid, boric acid and density iron ore powder into the base slurry, and uniformly stirring to obtain the permeable solidification pad fluid system. The osmotic cured prefluid systems were evaluated according to the chemical compatibility of the test mixtures in the API specification and the oil well cement compressive strength test methods, and the results are shown in tables 1, 2 and 3, respectively.
TABLE 1 basic Properties of the penetration curing preflush System
as can be seen from Table 1, the density of the pad liquid before permeation and solidification is adjustable, and the stability of the spacer liquid can be effectively improved by the suspension stabilizer and the permeation and solidification agent within a reasonable interval dosage range.
TABLE 2 penetration curing prepad fluid system and cement and mud mixing fluidity experiment
Table 2 notes: wherein% are by volume.
As can be seen from Table 2, the compatibility of the penetration curing pad fluid with cement slurry and slurry is good, the fluidity of the pad fluid in different density ranges is greater than 18cm no matter the pad fluid is mixed at low temperature and high temperature, and the suspension stabilizer and the penetration curing agent can also ensure that the compatibility of the mixed slurry is good in a reasonable interval dosage range, so that the requirements of field well cementation construction can be met.
TABLE 3 Cure Properties of the grout, mud and Cure-through pad systems
table 3 notes: v, cement paste: v, slurry: v-penetration-curing head fluid ═ 7: 2: 1 (all volume ratios).
As can be seen from Table 3, the compressive strength of the penetration and solidification pad fluid after being mixed and solidified with the cement slurry and the mud can be more than 7MPa within 24 hours, and the compressive strength after being solidified can meet the well cementation requirement.
Claims (10)
1. a permeable solidification front liquid system comprises the following components in parts by weight:
100 parts by weight of water, based on the total weight of the composition,
0.2 to 1 part by weight of a pH adjusting agent,
1 to 3 parts by weight of a suspension stabilizer,
0.2 to 4 parts by weight of a penetrating curing agent,
0 to 1 part by weight of an anti-staining agent,
0 to 140 parts by weight of a density modifier.
2. an osmotic curing pad fluid system according to claim 1, comprising the following components in parts by weight:
100 parts by weight of water, based on the total weight of the composition,
0.3 to 0.8 part by weight of a pH adjusting agent,
1 to 2.5 parts by weight of a suspension stabilizer,
0.5 to 3.5 parts by weight of a penetrating curing agent,
0 to 1 part by weight of an anti-staining agent,
0 to 140 parts by weight of a density modifier.
3. An osmotic curing pad fluid system according to claim 2, wherein:
The suspension stabilizer is 1-1.8 parts by weight.
4. A permeable solidification precursor liquid system according to any one of claims 1 to 3, wherein:
the water is selected from fresh water or water with salt content less than 0.5 g/L.
5. A permeable solidification precursor liquid system according to any one of claims 1 to 3, wherein:
The pH regulator is at least one of sodium carbonate, sodium hydroxide and sodium silicate.
6. A permeable solidification precursor liquid system according to any one of claims 1 to 3, wherein:
The suspension stabilizer is at least one selected from attapulgite, xanthan gum and carboxymethyl cellulose.
7. a permeable solidification precursor liquid system according to any one of claims 1 to 3, wherein:
The penetrating curing agent is at least one of superfine silicon dioxide, calcium oxide or magnesium oxide.
8. A permeable solidification precursor liquid system according to any one of claims 1 to 3, wherein:
The anti-fouling agent is at least one selected from boric acid, citric acid and phosphoric acid.
9. a permeable solidification precursor liquid system according to any one of claims 1 to 3, wherein:
The density regulator is selected from barite or iron ore powder for well cementation.
10. a method of preparing an osmotic curing pad fluid system according to any of claims 1 to 9, comprising the steps of:
Dissolving the suspension stabilizer and the pH regulator in water under stirring according to the dosage, and stirring and dissolving the solution to obtain base slurry; and then, adding components including a penetration curing agent, an anti-pollution agent and a density regulator into the base slurry, and uniformly stirring to obtain the anti-pollution agent.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185957A (en) * | 2021-04-29 | 2021-07-30 | 中海油田服务股份有限公司 | Curable spacer fluid |
| CN114368927A (en) * | 2022-01-20 | 2022-04-19 | 嘉华特种水泥股份有限公司 | High-temperature suspension stabilizer for oil well cement and preparation method thereof |
| CN114426816A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | High-temperature-resistant well cementation spacer fluid and preparation method and application thereof |
| CN114605975A (en) * | 2020-12-03 | 2022-06-10 | 中国石油天然气集团有限公司 | Interface enhanced pad fluid for oil field well cementation and preparation method and application thereof |
| CN115725284A (en) * | 2021-08-31 | 2023-03-03 | 中国石油天然气集团有限公司 | Flushing agent and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037659A (en) * | 1976-08-02 | 1977-07-26 | Union Oil Company Of California | Micellar flooding process for recovering oil from petroleum reservoirs |
| CN101161760A (en) * | 2007-10-10 | 2008-04-16 | 华北石油管理局钻井工艺研究院 | Oil well cement-injection pad fluid admixture and preparation method |
| CN101857799A (en) * | 2010-06-28 | 2010-10-13 | 西南石油大学 | Curable leaking stoppage spacer fluid and preparation method thereof |
| US20120043086A1 (en) * | 2010-08-23 | 2012-02-23 | Saudi Arabian Oil Company | Zero-Leakoff Emulsified Acid |
| CN104995279A (en) * | 2012-12-21 | 2015-10-21 | 哈利伯顿能源服务公司 | Consolidating spacer fluids and methods of use |
| CN105925254A (en) * | 2016-06-22 | 2016-09-07 | 西南石油大学 | Well-cementation working fluid system prepared from waste drilling fluid and drill cuttings |
-
2018
- 2018-06-04 CN CN201810561614.5A patent/CN110551489B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037659A (en) * | 1976-08-02 | 1977-07-26 | Union Oil Company Of California | Micellar flooding process for recovering oil from petroleum reservoirs |
| CN101161760A (en) * | 2007-10-10 | 2008-04-16 | 华北石油管理局钻井工艺研究院 | Oil well cement-injection pad fluid admixture and preparation method |
| CN101857799A (en) * | 2010-06-28 | 2010-10-13 | 西南石油大学 | Curable leaking stoppage spacer fluid and preparation method thereof |
| US20120043086A1 (en) * | 2010-08-23 | 2012-02-23 | Saudi Arabian Oil Company | Zero-Leakoff Emulsified Acid |
| CN104995279A (en) * | 2012-12-21 | 2015-10-21 | 哈利伯顿能源服务公司 | Consolidating spacer fluids and methods of use |
| CN105925254A (en) * | 2016-06-22 | 2016-09-07 | 西南石油大学 | Well-cementation working fluid system prepared from waste drilling fluid and drill cuttings |
Non-Patent Citations (2)
| Title |
|---|
| 杨振杰等: "自修复固井前置液自修复机理 ", 《钻井液与完井液》 * |
| 杨昭等: "《油田化学》", 31 January 2016, 哈尔滨工业大学出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114426816A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | High-temperature-resistant well cementation spacer fluid and preparation method and application thereof |
| CN114605975A (en) * | 2020-12-03 | 2022-06-10 | 中国石油天然气集团有限公司 | Interface enhanced pad fluid for oil field well cementation and preparation method and application thereof |
| CN113185957A (en) * | 2021-04-29 | 2021-07-30 | 中海油田服务股份有限公司 | Curable spacer fluid |
| CN115725284A (en) * | 2021-08-31 | 2023-03-03 | 中国石油天然气集团有限公司 | Flushing agent and application thereof |
| CN115725284B (en) * | 2021-08-31 | 2024-03-01 | 中国石油天然气集团有限公司 | Flushing agent and application thereof |
| CN114368927A (en) * | 2022-01-20 | 2022-04-19 | 嘉华特种水泥股份有限公司 | High-temperature suspension stabilizer for oil well cement and preparation method thereof |
| CN114368927B (en) * | 2022-01-20 | 2023-11-14 | 嘉华特种水泥股份有限公司 | High-temperature suspension stabilizer for oil well cement and preparation method thereof |
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