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Oil-based drilling fluid plugging agent and application thereof

A technology of oil-based drilling fluid and plugging agent, which is applied in the direction of reagents, drilling compositions, chemical instruments and methods, etc., can solve the problems of high construction risk, high use requirements, long time consumption, etc., to save operating time, The effect of low risk of use and improved sealing ability

Active Publication Date: 2021-09-28
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of this type of plugging agent has high requirements, takes a long time, and has relatively high construction risks

Method used

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  • Oil-based drilling fluid plugging agent and application thereof
  • Oil-based drilling fluid plugging agent and application thereof
  • Oil-based drilling fluid plugging agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides an oil-based drilling fluid plugging agent. The preparation process of the oil-based drilling fluid plugging agent is as follows:

[0049] 1. After heating and melting 100 parts of bisphenol A epoxy resin, add 15 parts of 4,4' diaminodiphenylmethane one by one and stir evenly, solidify at 80°C for 6 hours, then hot press molding, keep pressure and cool to room temperature, The temperature-controlled expansion material is obtained by pulverizing and granulating.

[0050] 2. Mix 60 parts of elastic graphite, 10 parts of powdered asphalt, 10 parts of bamboo fiber, 10 parts of the temperature-controlled expansion material obtained in step 1, and 10 parts of nitrile rubber powder to obtain an oil-based drilling fluid plugging agent.

[0051] 3. The oil-based drilling fluid was prepared in the same way as Comparative Example 1, and the oil-based drilling fluid plugging agent was slowly added to the oil-based drilling fluid according to the addition r...

Embodiment 2

[0053] This embodiment provides an oil-based drilling fluid plugging agent. The preparation process of the oil-based drilling fluid plugging agent is as follows:

[0054] 1. After heating and melting 100 parts of bisphenol A epoxy resin, add 8 parts of 4,4' diaminodiphenylmethane and 5 parts of m-phenylenediamine one by one and stir evenly, cure at 80°C for 2 hours, and heat up to 150°C Solidified for 4 hours, then hot-pressed, cooled to room temperature under pressure, pulverized and granulated to obtain a temperature-controlled expansion material.

[0055] 2. Mix 60 parts of calcium carbonate, 10 parts of powdered asphalt, 10 parts of bamboo fiber, 10 parts of the temperature-controlled expansion material obtained in step 1, and 10 parts of nitrile rubber powder to obtain an oil-based drilling fluid plugging agent.

[0056] 3. The oil-based drilling fluid was prepared in the same way as Comparative Example 1, and the oil-based drilling fluid plugging agent was slowly added ...

Embodiment 3

[0058] This embodiment provides an oil-based drilling fluid plugging agent. The preparation process of the oil-based drilling fluid plugging agent is as follows:

[0059] 1. After heating and melting 100 parts of bisphenol A epoxy resin, add 8 parts of m-phenylenediamine one by one and stir evenly, solidify at 100°C for 6 hours, then hot press molding, keep pressure and cool to room temperature, pulverize and granulate to obtain warm controlled expansion material.

[0060] 2. Mix 60 parts of calcium carbonate, 10 parts of powdered asphalt, 10 parts of bamboo fiber, 10 parts of the temperature-controlled expansion material obtained in step 1, and 10 parts of nitrile rubber powder to obtain an oil-based drilling fluid plugging agent.

[0061] 3. The oil-based drilling fluid was prepared in the same way as Comparative Example 1, and the oil-based drilling fluid plugging agent was slowly added to the oil-based drilling fluid according to the addition ratio of 50g / L, and stirred e...

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PUM

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Abstract

The invention provides an oil-based drilling fluid plugging agent and application thereof. The oil-based drilling fluid plugging agent comprises a bridging plugging material, a temperature control expansion material and a swelling plugging material. The invention also provides application of the oil-based drilling fluid plugging agent while drilling and application of the oil-based drilling fluid plugging agent in preparation of plugging slurry. The oil-based drilling fluid plugging agent has good compatibility and relatively strong plugging capability, and has temperature stimulus response and solvent stimulus response capabilities, and the generated synergistic interaction mechanism can improve the plugging capability of the plugging agent on leakage channels with different pore size distributions. The oil-based drilling fluid plugging agent can be applied to well leakage prevention of the oil-based drilling fluid or used for plugging a leakage layer after well leakage occurs.

Description

technical field [0001] The invention relates to the field of oil-based drilling fluid plugging, in particular to an oil-based drilling fluid plugging agent and application thereof. Background technique [0002] Lost circulation in drilling refers to a complex downhole working condition in which some or all of the drilling fluid leaks into the formation during the drilling process. Through the research on the lost circulation problem, it is found that different types of drilling fluids have obvious differences in the effects on lost circulation, and oil-based drilling fluids are more prone to lost circulation than water-based drilling fluids. At present, with the deepening of exploration and development of complex formations, the use of oil-based drilling fluids in unconventional oil and gas fields in China is increasing, and the well leakage problems of oil-based drilling fluids are also increasing, which seriously affects the process of oil and gas exploration and developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/42
CPCC09K8/03C09K8/426Y02P20/141
Inventor 张志磊焦亚军程荣超张永强冯杰杨峥徐进宾唐守勇卞维坤杨洪
Owner BC P INC CHINA NAT PETROLEUM CORP
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