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Preparation method of high-strength gel plugging agent material

The technology of a plugging agent and gel is applied in the field of preparation of high-strength gel plugging agent materials, which can solve the problems of reducing the mechanical properties of materials, poor plugging performance, easy to be diluted by running water, etc. Improve structural properties and mechanical strength, good viscoelasticity effect

Inactive Publication Date: 2018-12-14
FOSHAN CHAOHONG NEW MATERIAL TECH CO LTD
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a composite bio-based grouting for the existing gel plugging agent material with poor plugging performance, low strength, easy to be diluted by running water, and the defects of reducing the mechanical properties of the material. Material preparation method

Method used

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  • Preparation method of high-strength gel plugging agent material

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Embodiment Construction

[0018] Take the cane pith and pulverize it through a 100-mesh sieve, collect the sieved powder, add the sieved powder to a 5% sodium hydroxide solution by mass at a mass ratio of 1:10, stir and mix, and cook at 100-120 ° C for 1- 2h, stand to cool to room temperature, filter and collect the filter cake, vacuum freeze-dry and collect the dry particles, in parts by weight, weigh 45-50 parts of deionized water, 6-8 parts of dry particles, 10-15 parts of acrylic acid respectively , 6 to 8 parts of 200 mesh kaolin, 25 to 30 parts of N,N'-methylenebisacrylamide and 0.1 to 0.5 parts of ammonium persulfate were placed in a three-necked flask, stirred and mixed and adjusted with a mass fraction of 5% sodium hydroxide solution pH to 8.5, stir and mix and place in a three-necked flask, incubate the reaction at 75-80 °C for 2-3 hours, let stand to cool to room temperature, collect the reaction solution and place it in the syringe of the electrospinning device, and control the constant perf...

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Abstract

The invention relates to a preparation method of a high-strength gel plugging agent material and belongs to the technical field of plugging agent materials. The preparation method adopts gel compositenano-bentonite for modification. Through the intermolecular hydrogen bonding action of the gel molecular chain and chemical intermolecular action of different treatment agents, a very strong space truss structure is formed and has stable performances, through adhesion to the stratum and own structural force of the space truss structure, the gel is retained in a leakage layer and blocks the leakage layer, after the gel enters the leakage layer, the gel can fast expand under the temperature action of the stratum and fill and plug large cracks and holes, the water absorbing fibers fill the gel,and because the water absorbing fibers absorb water, expand and form effective entanglement and filling inside the gel material, it is avoided that the cement slurry cannot stay or the fluid in the stratum dilutes the plugging slurry to cause blocking failure when the cement slurry is used alone for blocking and the structural properties and mechanical strength of the material are further improved.

Description

technical field [0001] The invention relates to a preparation method of a high-strength gel plugging agent material, and belongs to the technical field of plugging agent materials. Background technique [0002] Loss of circulation is a common and complex situation in the process of oil and gas exploration and development. It will cause the consumption of drilling and drilling fluids. In severe cases, it will also cause sticking, blowout, well collapse, and even wellbore scrap, resulting in significant economic losses. In general, leakage can be divided into permeability leakage, micro-fracture leakage, small fracture and small hole leakage, and large fracture and karst leakage. At present, domestic and foreign researchers have effective solutions for permeability leakage, small fracture leakage and drilling leakage. However, due to the characteristics of good pore connectivity, development of karst caves, high temperature of the leakage layer, and the existence of formation...

Claims

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Application Information

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IPC IPC(8): C09K8/508C08J3/075C08L33/24C08L35/00C08K3/34
CPCC08J3/075C08J2333/24C08J2435/00C08K3/346C08K2201/011C09K8/5083C09K2208/08
Inventor 刘菊花韩桂林
Owner FOSHAN CHAOHONG NEW MATERIAL TECH CO LTD
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