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Oil-based cross-linking blocking agent and preparation method thereof

A plugging agent and oil-based technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor plugging effect, low plugging success rate, poor retention capacity, etc., to improve plugging success High efficiency, good blocking ability, and improved inhibitory effect

Active Publication Date: 2018-05-04
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

It overcomes the disadvantages that the existing oil-based plugging materials have poor retention capacity in the fractures or holes where leakage occurs, and it is difficult to form accumulations with sufficient strength around the wellbore, resulting in poor plugging effect and low plugging success rate.

Method used

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  • Oil-based cross-linking blocking agent and preparation method thereof
  • Oil-based cross-linking blocking agent and preparation method thereof
  • Oil-based cross-linking blocking agent and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0011] A preparation method of an oil-based crosslinking plugging agent, the method steps are as follows: 20 parts by mass of Al-Fe-Mg nanomaterials and 100 parts by mass of deionized water are added to a three-necked flask, and the slurry is adjusted The pH value of the material is 5.0-7.0, heated to 60-80°C, kept warm for 0.5h, and then added 40-60 parts by mass of α-hexadecyl trimethyl betaine, at 2000r / min-4000r / min React at a rotating speed for 0.5h, filter with suction, dry, and grind to obtain an oil-based cross-linking plugging agent.

[0012] The preparation method of preferred oil-based crosslinking plugging agent, in this method, the Al-Fe-Mg nanometer material of 20 mass parts and the deionized water of 100 mass parts are added in the there-necked flask, adjust slurry The pH value is 6.0, heated to 80°C, kept warm for 0.5h, then added 50 parts by mass of α-hexadecyltrimethylbetaine, reacted at a speed of 3000r / min for 0.5h, suction filtered, and dried , after grin...

Embodiment 1

[0019] Add 20 parts by mass of Al-Fe-Mg nanomaterials and 100 parts by mass of deionized water into a 250mL three-neck flask, adjust the pH value of the slurry to 5.0, heat to 60°C, keep it warm for 0.5h, and then add 40 parts by mass of α-hexadecyltrimethylbetaine were reacted at a speed of 2000r / min for 0.5h, filtered with suction, dried, and ground to obtain oil-based cross-linked plugging agent sample 1.

Embodiment 2

[0021] Add 20 parts by mass of Al-Fe-Mg nanomaterials and 100 parts by mass of deionized water into a 250mL three-neck flask, adjust the pH value of the slurry to 6.0, heat to 60°C, keep it warm for 0.5h, and then add 40 parts by mass of α-hexadecyltrimethylbetaine were reacted at a speed of 2000r / min for 0.5h, filtered with suction, dried, and ground to obtain oil-based crosslinking plugging agent sample 2.

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Abstract

The invention relates to the technical field of drilling fluid treatment agent for oil field drilling, in particular to an oil-based cross-linking blocking agent and a preparation method thereof. Theoil-based cross-linking blocking agent comprises the following constitution components in parts by mass: 20 parts of an Al-Fe-Mg nano material and 40-60 parts of alpha-hexadecyl trimethyl glycine betaine. By adopting the oil-based cross-linking blocking agent, a relatively good oil-based cross-linking blocking property is achieved, micro cracks can be effectively blocked when the blocking agent isindependently used, the blocking success rate can be increased when the blocking agent is compounded with other blocking materials, and due to addition of the oil-based cross-linking blocking agent in an oil-based drilling fluid, the API filter loss and the HTHP filter loss of the drilling fluid and the rock core blocking rate are effectively reduced, and the inhibition of the oil-based drillingfluid is further improved.

Description

Technical field: [0001] The invention relates to the technical field of drilling fluid treatment agents in oilfield drilling, in particular to an oil-based crosslinking plugging agent and a preparation method thereof. Background technique: [0002] Oil-based drilling fluid has many advantages such as high temperature stability, strong inhibition, excellent lubricity and good water-sensitive reservoir protection effect. However, with the continuous deepening of petroleum exploration and development, the problem of well leakage has become increasingly prominent, and the loss of oil-based drilling fluid will cause huge losses to drilling engineering, which has become a restrictive factor for the further popularization and application of oil-based drilling fluid. It is difficult to overcome the settlement problem of water-wet plugging agent in the process of oil-based drilling fluid while drilling. Intensity accumulations lead to poor plugging effect and low plugging success ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/32C09K8/36C09K8/46
CPCC09K8/32C09K8/36C09K8/426C09K8/46
Inventor 王晓军李俊杞蒋立洲关键鞠红波孙婉清徐路孔栋梁韩龙孙云超鲁政权景烨琦刘畅任艳崔晓艳闻丽王丽君杨超程东洪伟钱志伟罗欢王西贵李晴庄纯才
Owner BC P INC CHINA NAT PETROLEUM CORP
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