CN111978935A - Strongly-inhibitory foaming agent for anion Gemini type foam drilling - Google Patents
Strongly-inhibitory foaming agent for anion Gemini type foam drilling Download PDFInfo
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- CN111978935A CN111978935A CN201910424792.8A CN201910424792A CN111978935A CN 111978935 A CN111978935 A CN 111978935A CN 201910424792 A CN201910424792 A CN 201910424792A CN 111978935 A CN111978935 A CN 111978935A
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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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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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
- C09K8/02—Well-drilling compositions
- C09K8/38—Gaseous or foamed well-drilling compositions
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- Organic Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention discloses a strongly-inhibitory foaming agent for anion gemini foam drilling, which comprises 10-40% of an anion gemini foaming agent, 5-20% of a foam stabilizer, 1-8% of a functional auxiliary agent and 32-84% of water. The foaming agent disclosed by the invention is applied to the foam drilling process, has higher temperature resistance and excellent foam performance, and also has low interfacial tension and strong inhibition performance.
Description
Technical Field
The invention relates to a strongly-inhibitory foaming agent for anion Gemini foam drilling, in particular to a foaming agent for foam drilling, which can be recycled in the drilling process of a low-pressure and easily-leaked stratum, and belongs to the field of treating agents for oil field drilling fluids.
Background
At present, in the low-pressure or under-balanced drilling process of domestic oil fields, foam drilling fluid is often adopted to reduce the density of the drilling fluid and ensure the safety of drilling construction. Compared with the conventional mud drilling fluid, the foam fluid has low density and small bottom hole pressure holding effect, can effectively control the circulating leakage of the drilling fluid, improve the drilling speed of machinery, reduce the damage of a reservoir stratum and protect a low-pressure oil-gas reservoir. Especially, the method plays an important role in developing low-permeability and low-pressure reservoirs, unconventional oil and gas resources and old oil field transformation. It has become one of the most promising drilling technologies after the horizontal well drilling technology. However, the liquid column pressure formed by the foam fluid in the foam drilling process cannot balance the collapse pressure of the stratum, and the air foam fluid cannot form a mud cake on the well wall, so that the well wall is easy to destabilize when water-sensitive shale strata such as water swelling and water collapse are drilled, complex accidents such as drilling sticking are caused, and the failure of the drilling engineering is caused, therefore, the adoption of a foam drilling fluid system with strong inhibition on the shale strata is particularly critical. Meanwhile, the foaming performance and foam stabilizing performance of the foam drilling fluid have great influence on the suspension and rock carrying capacity of the drilling fluid, and the higher the foam stability is, the stronger the suspension capacity is. With the continuous popularization of foam drilling technology, the used stratum conditions are more and more rigorous, and the requirements on foam drilling fluid are higher and higher, wherein the most important is the high temperature resistance of the foam drilling fluid.
The specification of Chinese invention patent CN104109520 discloses a high-salt (100000 E.C.) suitable for high temperature (95℃)
150000mg/L) oil reservoir foaming agent and a preparation method thereof, the foaming agent consists of 50-70 wt% of alkyl sulfonate, 10-15 wt% of alkylamine oxide and distilled water, has good high-temperature foaming property (95 ℃, the maximum foaming volume is 960mL), but has poor foam stability (the half-life period is less than or equal to 10min), and does not consider the low interfacial tension performance.
The specification of the Chinese invention patent CN104312563B discloses a surfactant for cationic microbubble drilling fluid and a preparation method thereof, wherein the foaming volume is 270-360mL, the half-life period is 10.7-14.3min, and the foaming performance and foam stabilizing performance are poor.
In conclusion, the existing foaming agent for foam drilling cannot simultaneously have high temperature resistance (180 ℃), high foaming performance (more than 600mL), high foam stabilizing performance (foam half-life period is more than 180min) and low interfacial tension (10)-2mN/m order of magnitude), strong inhibiting performance (the core rolling recovery rate is more than 98%).
Disclosure of Invention
One of the objects of the present invention is to provide a novel strongly inhibitory foaming agent for anionic gemini foam drilling.
The second purpose of the invention is to overcome the problemsThe prior art has the defects of resisting high temperature of 180 ℃, having a foaming volume of more than 600mL, a foam half-life period of more than 180min and an interfacial tension of 10 -2mN/m order of magnitude, and simultaneously, has strong inhibition performance (the rolling recovery rate of the core reaches more than 98 percent).
The main technical scheme of the invention is as follows: a strongly-inhibitive foaming agent for anion gemini foam drilling is characterized in that the foaming agent comprises an anion gemini foaming agent.
The molecular structural general formula of the anionic gemini foaming agent is as follows:
wherein: n = 8 ~ 20, x = 2 ~ 14, y = 2 ~ 11, x, y are the integer.
The foaming agent comprises an anionic gemini foaming agent, a foam stabilizer, a functional auxiliary agent and water, and the foaming agent comprises the following components in percentage by mass: 10-40% of anionic gemini foaming agent, 5-20% of foam stabilizer, 1-8% of functional auxiliary agent and 32-84% of water.
The foam stabilizer is one or a combination of N-alkyl iminodiacetic acid sodium salt, N-lauroyl ethylenediamine triacetate, ethylenediamine triacetic acid sodium salt, ethylenediamine tetraacetic acid sodium salt, lauroyl amphoteric disodium diacetate and lauroyl propyl hydroxy sulfonic acid betaine.
The functional auxiliary agent is one or a composition of dimethyl hexadienyl ammonium chloride, triethanolamine methyl ammonium chloride, choline chloride and polydiallyl dimethyl ammonium chloride.
The invention preferably has the following molecular formulas and mass ratios of the components:
The molecular structural general formula of the anionic gemini foaming agent is as follows:
wherein: n = 12, x = 5, y = 2.
The functional auxiliary agent is triethanolamine methyl ammonium chloride.
Compared with the prior art, the invention has more prominent effects as follows: the foaming agent is simple to prepare and low in price, and has high temperature resistance, excellent foaming performance, low interfacial tension and strong inhibition performance.
Detailed Description
The present invention will be described in detail with reference to examples.
Example 1
Adding 85g of clear water into a 500mL beaker, starting stirring, sequentially adding 10g of an anionic gemini foaming agent (n = 12, x = 5, y = 2) and 5g of ethylene diamine tetraacetic acid sodium salt, and stirring until the anionic gemini foaming agent and the ethylene diamine tetraacetic acid sodium salt are completely dissolved to obtain a foaming agent product 1.
Example 2
Adding 83g of clear water into a 500mL beaker, starting stirring, sequentially adding 10g of an anionic gemini foaming agent (n = 12, x = 5, y = 2), 5g of ethylene diamine tetraacetic acid sodium salt and 2g of triethanolamine methylammonium chloride, and stirring until the anionic gemini foaming agent is completely dissolved to obtain an inhibitory foaming agent product 2.
Example 3
Adding 69g of clear water into a 500mL beaker, starting stirring, sequentially adding 20g of an anionic gemini foaming agent (n = 12, x = 5, y = 2), 10g of ethylene diamine tetraacetic acid sodium salt and 1g of triethanolamine methylammonium chloride, and stirring until the anionic gemini foaming agent is completely dissolved to obtain an inhibitory foaming agent product 3.
Example 4
Adding 65g of clear water into a 500mL beaker, starting stirring, sequentially adding 10g of an anionic gemini foaming agent (n = 12, x = 5, y = 2), 20g of ethylene diamine tetraacetic acid sodium salt and 5g of triethanolamine methylammonium chloride, and stirring until the anionic gemini foaming agent is completely dissolved to obtain an inhibitory foaming agent product 4.
Example 5
Adding 72g of clear water into a 500mL beaker, starting stirring, sequentially adding 15g of an anionic gemini foaming agent (n = 12, x = 5, y = 2), 5g of ethylene diamine tetraacetic acid sodium salt and 8g of triethanolamine methylammonium chloride, and stirring until the anionic gemini foaming agent is completely dissolved to obtain an inhibitory foaming agent product 5.
Example 6
Adding 54g of clear water into a 500mL beaker, starting stirring, sequentially adding 40g of an anionic gemini foaming agent (n = 12, x = 5, y = 2), 5g of ethylene diamine tetraacetic acid sodium salt and 1g of triethanolamine methylammonium chloride, and stirring until the anionic gemini foaming agent is completely dissolved to obtain an inhibitory foaming agent product 6.
Example 7
Adding 32g of clear water into a 500mL beaker, starting stirring, sequentially adding 40g of an anionic gemini foaming agent (n = 12, x = 5, y = 2), 20g of ethylene diamine tetraacetic acid sodium salt and 8g of triethanolamine methylammonium chloride, and stirring until the anionic gemini foaming agent is completely dissolved to obtain an inhibitory foaming agent product 7.
Example 8
Adding 84g of clear water into a 500mL beaker, starting stirring, sequentially adding 10g of an anionic gemini foaming agent (n = 12, x = 5, y = 2), 5g of ethylene diamine tetraacetic acid sodium salt and 1g of triethanolamine methylammonium chloride, and stirring until the anionic gemini foaming agent is completely dissolved to obtain an inhibitory foaming agent product 8.
Example 9: evaluation of the Properties of the inhibiting blowing agent
Evaluation of foam performance of the inhibiting foaming agent: removing 1.0g of sample, adding into 99.0g of clear water (mass concentration of 1%), stirring slightly until completely dissolved, transferring the foaming agent solution into a measuring cup of a high-speed stirrer, stirring at 11000 rpm for 1min, starting timing after stirring is stopped, quickly pouring formed foam into a measuring cylinder, measuring and recording the volume V of the foam0The time t taken for 50mL of liquid to settle out of the foam was recorded1(half-life of the solution) and the time t taken for the foam volume to fall to half of the initial volume2(foam half life).
Evaluating the temperature resistance of the inhibiting foaming agent: removing 1.0g of sample, adding into 99.0g of clear water (mass concentration is 1%), slightly stirring until the sample is completely dissolved, transferring into a high-temperature aging kettle, placing for 24 hours at 180 ℃ in a hot rolling way, cooling, taking out the solution, and measuring the foam property.
Evaluation of interfacial tension performance of the inhibiting foaming agent: sampling to prepare 0.3% solution, and measuring the interfacial tension with crude oil by using a TX-500C type full-range automatic dynamic rotary drop interfacial tension meter.
Evaluation of inhibition performance of inhibitory foaming agent: and (3) testing the core rolling recovery rate of the shale in clear water and a foaming agent solution according to a standard SY-T5613-2000 shale physical and chemical property test method. The method comprises the following specific steps: weighing 20.0g of 4-8 mesh rock core, adding into a high-temperature aging kettle, adding 350mL of deionized water or a foaming agent solution system with the concentration of 1.0% into the aging kettle, hot rolling for 16h at 80 ℃, sieving the rock core with a 100-mesh sieve, drying the sieved substance for 4h at 105 ℃, cooling to room temperature in a dryer, and weighing. The ratio of the weight of the recovered rock debris to the weight of the initial rock debris is the primary core recovery rate.
TABLE 1 inhibiting blowing agent Properties
The evaluation results of the above examples show that the strongly-inhibitory foaming agent for anion gemini foam drilling provided by the invention has the advantages of high temperature resistance at 180 ℃, foaming volume of more than 600mL, foam half-life period of more than 180min, and interfacial tension of 10- 2mN/m order of magnitude, and meanwhile, the foaming agent also has strong inhibition performance (the rolling recovery rate of the core reaches more than 98 percent).
Claims (8)
1. A strongly-inhibitory foaming agent for anionic gemini foam drilling is characterized by comprising an anionic gemini foaming agent.
2. The anionic gemini strongly-inhibitory foaming agent for drilling wells as claimed in claim 1, wherein the molecular structural general formula of the anionic gemini foaming agent is as follows:
wherein: n = 8 ~ 20, x = 2 ~ 14, y = 2 ~ 11, x, y are the integer.
3. The anion gemini type strongly-inhibitory foaming agent for drilling well as recited in claim 1, characterized in that the foaming agent comprises an anion gemini foaming agent, a foam stabilizer, a functional auxiliary agent and water, and the mass percentages of the components are as follows:
10 to 40 percent of anionic gemini foaming agent
5 to 20 percent of foam stabilizer
1 to 8 percent of functional additive
32 to 84 percent of water.
4. The anionic gemini strongly-inhibitory foaming agent for foam drilling as claimed in claim 3, wherein said foam stabilizer is one of N-alkyl iminodiacetic acid sodium salt, N-lauroyl ethylenediamine triacetate, ethylenediamine triacetic acid sodium salt, ethylenediamine tetraacetic acid sodium salt, disodium lauroyl amphodiacetate, lauroyl propyl hydroxysultaine, or a combination thereof.
5. The anionic gemini strongly-inhibitory foaming agent for foam drilling as claimed in claim 3, wherein the functional auxiliary agent is one or a combination of dimethylhexadienyl ammonium chloride, triethanolamine methyl ammonium chloride, choline chloride and polydiallyldimethyl ammonium chloride.
6. A strongly inhibitory foaming agent for anionic twin-type drilling according to claim 2, characterised in that n = 12.
7. A strongly inhibitory foaming agent for anionic twin-type drilling according to claim 2, characterised in that x =5 and y = 2.
8. The anionic twin-type strongly-inhibitory foaming agent for drilling as defined in claim 5, wherein said functional adjuvant is triethanolamine methylammonium chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910424792.8A CN111978935B (en) | 2019-05-21 | 2019-05-21 | Strongly-inhibitory foaming agent for anion Gemini type foam drilling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910424792.8A CN111978935B (en) | 2019-05-21 | 2019-05-21 | Strongly-inhibitory foaming agent for anion Gemini type foam drilling |
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| CN111978935A true CN111978935A (en) | 2020-11-24 |
| CN111978935B CN111978935B (en) | 2022-10-14 |
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Citations (6)
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|---|---|---|---|---|
| CN103623740A (en) * | 2013-10-23 | 2014-03-12 | 长江大学 | Gemini surfactant containing sulfo group and sulfate group anions |
| CN104449597A (en) * | 2013-09-17 | 2015-03-25 | 中国石油化工股份有限公司 | Strong-inhibitory-property foaming agent for shale stratum foam drilling |
| CN104498016A (en) * | 2014-12-17 | 2015-04-08 | 唐山冀油瑞丰化工有限公司 | Foam agent used in carbon-dioxide flooding and preparation method of foam agent |
| CN105080420A (en) * | 2014-04-17 | 2015-11-25 | 中国石油化工股份有限公司 | Gemini surfactant, preparation method and use method thereof |
| CN107130953A (en) * | 2017-05-17 | 2017-09-05 | 成都百联油田技术服务有限公司 | A kind of chemical enhanced gas producing technology |
| CN108003849A (en) * | 2016-10-28 | 2018-05-08 | 中国石油化工股份有限公司 | Mud shale stratum foam drilling salt tolerant strong rejection capability foaming agent |
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2019
- 2019-05-21 CN CN201910424792.8A patent/CN111978935B/en active Active
Patent Citations (6)
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| CN104449597A (en) * | 2013-09-17 | 2015-03-25 | 中国石油化工股份有限公司 | Strong-inhibitory-property foaming agent for shale stratum foam drilling |
| CN103623740A (en) * | 2013-10-23 | 2014-03-12 | 长江大学 | Gemini surfactant containing sulfo group and sulfate group anions |
| CN105080420A (en) * | 2014-04-17 | 2015-11-25 | 中国石油化工股份有限公司 | Gemini surfactant, preparation method and use method thereof |
| CN104498016A (en) * | 2014-12-17 | 2015-04-08 | 唐山冀油瑞丰化工有限公司 | Foam agent used in carbon-dioxide flooding and preparation method of foam agent |
| CN108003849A (en) * | 2016-10-28 | 2018-05-08 | 中国石油化工股份有限公司 | Mud shale stratum foam drilling salt tolerant strong rejection capability foaming agent |
| CN107130953A (en) * | 2017-05-17 | 2017-09-05 | 成都百联油田技术服务有限公司 | A kind of chemical enhanced gas producing technology |
Non-Patent Citations (1)
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Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Address before: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee before: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Patentee before: CHINA PETROLEUM & CHEMICAL Corp. |
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