Bridging material and its preparation method as well as plugging agent and plugging liquid and application thereof

A technology of bridging material and leakage plugging agent, applied in the field of petroleum engineering drilling, can solve problems such as poor leakage plugging effect, and achieve the effect of increasing integrity, optimizing leakage plugging effect, and easy bridging

Active Publication Date: 2019-04-12
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a bridging material and its preparation method as well as a leak-stopping agent, a leak-stopping liquid and its application in order to overcome the defects of the poor plugging effect of the above-mentioned bridging materials existing in the prior art

Method used

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  • Bridging material and its preparation method as well as plugging agent and plugging liquid and application thereof

Examples

Experimental program
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Effect test

Embodiment approach

[0029] According to a preferred embodiment of the present invention, the honeycomb structure material is honeycomb activated carbon polyurethane sponge.

[0030] The honeycomb activated carbon polyurethane sponge described in the present invention is commercially available. Honeycomb activated carbon polyurethane sponge is an air purification filter material made of high-quality, strong adsorption powder activated carbon attached to a polyurethane foam carrier by using a polymer bonding material. Its carbon content can be about 30-50% by weight, and it has good adsorption performance. In the prior art, it is mostly used for air purification to remove volatile organic compounds and dust, smog, odor, formaldehyde and other polluting and harmful substances in the air.

[0031] The aperture of described honeycomb activated carbon polyurethane sponge can be properly selected according to the width of the actual leakage layer crack. Preferably, the aperture of described honeycomb ...

Embodiment 1

[0063] This example is used to illustrate the bridging material, leakage stoppage agent and leakage stoppage fluid of the present invention and the preparation method thereof.

[0064] Preparation of bridging materials:

[0065] (1) Based on the total weight of 100 parts by weight of bridging materials, 1 part by weight of honeycomb sponge with a particle size of 6 mm and a pore diameter of 15PPI (commercially purchased from Dongguan Zhicheng Foam Products Co., Ltd. Polyurethane sponge), 90 parts by weight of calcium carbonate particles with a particle diameter of 2-2.5mm are added to the drum agitator and mixed in turn. The drum agitator rotates at a speed of 90r / min, and the stirring time is 15 minutes. The obtained material was observed with the naked eye, and most calcium carbonate particles visible to the naked eye entered the activated carbon polyurethane sponge.

[0066] (2) Continue to add 9 parts by weight of sulfonated pitch powder (commercially purchased from Renqi...

Embodiment 2

[0073] This example is used to illustrate the bridging material, leakage stoppage agent and leakage stoppage fluid of the present invention and the preparation method thereof.

[0074] Preparation of bridging materials:

[0075] (1) Taking 100 parts by weight of the bridging material gross weight as a benchmark, get 4 parts by weight of a honeycomb sponge with a particle size of 5mm and an aperture of 20PPI (commercially purchased from Dongguan City Zhicheng Foam Products Co., Ltd. honeycomb activated carbon Polyurethane sponge), 90 parts by weight of calcium carbonate particles with a particle diameter of 1.5mm-2mm are added to the drum agitator and mixed successively. The obtained material was observed with the naked eye, and most calcium carbonate particles visible to the naked eye entered the activated carbon polyurethane sponge.

[0076] (2) Add 6 parts by weight of sulfonated asphalt powder (same as in Example 1) to the drum mixer, and stir for 5 minutes at a rotation s...

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Abstract

The invention relates to the field of petroleum engineering drilling, and discloses a bridging material and a preparation method thereof, and a plugging agent and a plugging liquid and application thereof. The bridging material comprises a honeycomb structural material, a rigid granular material and an adsorbing material, wherein at least part of the rigid granular material exists in the honeycombstructural material, and at least part of the adsorbing material is adsorbed to the honeycomb structural material so as to prevent the rigid granular material in the honeycomb structural material from falling off. The preparation method comprises the following steps: (1) mixing a honeycomb structural material and a rigid granular material until at least part of the rigid particulate granular exists in the honeycomb structural material; and (2) stirring and mixing a material obtained in the step (1) and the adsorbing material. The bridging material provided by the invention has the characteristics of ''flexibility and hardness''; and the formed barrier layer has good integrity and strong compactness, and is particularly suitable for the leakage situation when a conventional bridging plugging material is difficult to form a stable bridging in the fractured formation of carbonate rocks.

Description

technical field [0001] The invention relates to the field of petroleum engineering drilling, in particular to a bridging material and a preparation method thereof, a leak-stopping agent, a leak-stopping fluid and applications thereof. Background technique [0002] Fractured lost circulation is one of the most common and most difficult downhole complications in oil and gas drilling engineering. It will not only increase drilling costs and consume drilling time, but also easily lead to other downhole complications and accidents such as blowout and well collapse. [0003] Commonly used plugging materials can be mainly divided into bridging plugging, cement plugging, and chemical gel plugging. Among them, bridging plugging is the most widely used because of its cheap materials and wide sources. The bridging plugging process is to mix the bridging and filling materials into the base slurry to form a plugging slurry, inject it into the leaking layer through a mud pump, and enter ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/42C09K8/514C09K8/516
CPCC09K8/426C09K8/5045C09K8/5086C09K8/514C09K8/516C09K2208/18
Inventor 王贵杨京华何仲方静周伟
Owner SOUTHWEST PETROLEUM UNIV
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