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A hybrid gel particle plugging agent while drilling and its preparation method

A hybrid gel and plugging technology while drilling, which is applied in the field of drilling fluid plugging, can solve problems such as insufficient binding force, heterogeneous gel, poor dispersion and compatibility, etc., and achieve high pressure bearing capacity and toughness Strong, enhanced bond strength

Active Publication Date: 2021-09-28
RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned rigid nanomaterials, such as silicon dioxide, have strong water absorption due to the existence of surface hydroxyl groups, but there are problems such as insufficient binding force, poor dispersion and compatibility in the organic gel system; Simply adding conventional nano-rigid particles is easy to cause particle agglomeration, which makes the synthesized gel heterogeneous and has great limitations in the use of high-temperature and high-pressure formations, such as temperature resistance, pressure bearing capacity and toughness, etc. will be seriously affected

Method used

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  • A hybrid gel particle plugging agent while drilling and its preparation method
  • A hybrid gel particle plugging agent while drilling and its preparation method
  • A hybrid gel particle plugging agent while drilling and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A hybrid gel particle LWD plugging agent, prepared from the following raw materials in parts by mass: 20 parts of reactive monomers, 1.0 parts of crosslinking agent, 0.3 parts of initiator, 3.0 parts of silane coupling agent, nano-scale Rigid particles 1.0 parts.

[0044] The reactive monomer is methacrylamide, hydroxyethyl methacrylate and sodium p-styrenesulfonate, the mass ratio is 5:2:1; the crosslinking agent is hydroxypropyl methacrylate; the initiator is azobis Isobutylamidine hydrochloride (AIBA, V-50); silane coupling agent is KH550 (3-aminopropyltriethoxysilane); nano-scale rigid particles are nano-silica (average particle size 20±3nm , density 2.3g / cm 3 ).

[0045] The preparation method of the above-mentioned hybrid gel particle plugging agent while drilling comprises the steps of:

[0046] (1) Firstly, dissolve the silane coupling agent in deionized water to configure coupling agent solution A (the mass ratio of silane coupling agent to deionized water i...

Embodiment 2

[0052] A hybrid gel particle LWD plugging agent, prepared from the following raw materials in parts by mass: 20 parts of reactive monomers, 1.0 parts of crosslinking agent, 0.3 parts of initiator, 3.0 parts of silane coupling agent, nano-scale Rigid particles 1.0 parts.

[0053] The reactive monomer is methacrylamide, hydroxyethyl methacrylate and sodium p-styrenesulfonate, the mass ratio is 4:2:1; the crosslinking agent is hydroxypropyl methacrylate; the initiator is azobis Isobutylamidine hydrochloride (AIBA, V-50); silane coupling agent is KH550 (3-aminopropyltriethoxysilane); nano-scale rigid particles are nano-silica (average particle size 20±3nm , density 2.3g / cm 3 ).

[0054] The preparation method of the above-mentioned hybrid gel particle plugging agent while drilling comprises the steps of:

[0055] (1) Firstly, dissolve the silane coupling agent in deionized water to configure coupling agent solution A (the mass ratio of silane coupling agent to deionized water i...

Embodiment 3

[0061] A hybrid gel particle LWD plugging agent, prepared from the following raw materials in parts by mass: 30 parts of reactive monomers, 1.0 parts of crosslinking agent, 0.4 parts of initiator, 3.0 parts of silane coupling agent, nano-scale Rigid particles 1.0 parts.

[0062] The reactive monomer is methacrylamide, hydroxyethyl methacrylate and sodium p-styrenesulfonate, the mass ratio is 4:2:1; the crosslinking agent is hydroxypropyl methacrylate; the initiator is azobis Isobutylamidine hydrochloride (AIBA, V-50); silane coupling agent is KH550 (3-aminopropyltriethoxysilane); nano-scale rigid particles are nano-silica (average particle size 20±3nm , density 2.3g / cm 3 ).

[0063] The preparation method of the above-mentioned hybrid gel particle plugging agent while drilling comprises the steps of:

[0064] (1) Firstly, dissolve the silane coupling agent in deionized water to configure coupling agent solution A (the mass ratio of silane coupling agent to deionized water i...

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Abstract

The invention provides a hybrid gel particle-while-drilling plugging agent and a preparation method thereof. The plugging agent is prepared from the following raw materials in parts by mass: 20-35 parts of reactive monomer, 1.0-3.0 parts of cross-linking agent parts, 0.3-0.5 parts of initiator, 3.0-5.0 parts of silane coupling agent, and 0.5-2.0 parts of nanoscale rigid particles; the reactive monomers are methacrylamide, hydroxyethyl methacrylate, lauryl acrylate, Three or more combinations of tert-butyl methacrylate, dibutyl adipate, sodium p-styrene sulfonate, vinylbenzenesulfonic acid or divinylbenzene; the nanoscale rigid particles are nanoscale One or a combination of two or more of calcium carbonate, nano-silica, talc or wollastonite. The gel particle plugging agent prepared by the invention has the advantages of strong toughness, high temperature resistance, strong pressure bearing capacity at high temperature, and good plugging effect.

Description

technical field [0001] The invention relates to a hybrid gel particle plugging agent while drilling and a preparation method thereof, belonging to the drilling fluid plugging technology in the field of petroleum exploration and development. Background technique [0002] Lost circulation is a phenomenon in which drilling fluid invades and infiltrates into the formation through micro-fractures and pores due to the positive pressure difference between the oil and gas well and the formation. Lost circulation has always been a very common and difficult technical problem in the drilling process. Lost circulation will not only reduce the drilling speed, consume a lot of operating time, and lose a huge amount of materials and drilling fluid, but may also cause a series of complex accidents such as blowout and well collapse, and the most serious one will lead to the scrapping of the entire wellbore. and people have brought great property losses. In lost circulation, fractured and k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/467C08F220/56C08F220/20C08F212/14C08F222/38
CPCC08F220/56C09K8/426C09K8/467C09K2208/18C08F220/20C08F212/14C08F222/385
Inventor 李伟张文哲王波李红梅王涛白英睿吕开河薛少飞
Owner RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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