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Partial acid-soluble compound material plugging agent and preparation method and use method thereof

A plugging agent and acid-soluble technology, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well parts, etc., can solve the problems of high production cost and poor plugging performance of imported plugging agents, and achieve raw materials The effect of low price, improved processing efficiency, and wide source of raw materials

Inactive Publication Date: 2017-06-27
CNPC XIBU DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a partially acid-soluble composite material plugging agent and its preparation method and use method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problems of poor plugging performance and The problem of high production cost of imported plugging agent

Method used

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  • Partial acid-soluble compound material plugging agent and preparation method and use method thereof
  • Partial acid-soluble compound material plugging agent and preparation method and use method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: This part of the acid-soluble composite material plugging agent, the raw materials include 10 to 25 parts of mineral fibers with a mesh number of 20 to 60 mesh, and 10 to 30 parts of plant fibers with a mesh of 10 to 40 mesh in parts by weight. 5 parts to 15 parts of synthetic fiber from 10 mesh to 40 mesh, 10 to 15 parts of rigid material from 60 mesh to 80 mesh, 10 to 20 parts of rigid material from 80 mesh to 100 mesh and 15 parts of rigid material from 100 mesh to 120 mesh to 20 parts, the part of the acid-soluble composite material plugging agent is obtained by the following method: the required amount of mesh is 20 mesh to 60 mesh mineral fiber, 10 mesh to 40 mesh plant fiber, 10 mesh to 40 mesh Purpose synthetic fiber, 60-mesh to 80-mesh rigid material, 80-mesh to 100-mesh rigid material and 100-mesh to 120-mesh rigid material are mixed to obtain a partially acid-soluble composite material plugging agent.

Embodiment 2

[0025] Embodiment 2: This part of the acid-soluble composite material plugging agent, the raw materials include 10 or 25 parts of mineral fibers with a mesh number of 20 to 60 mesh, 10 or 30 parts of plant fibers with a mesh of 10 to 40 mesh in parts by weight. 5 or 15 parts of synthetic fiber from 10 mesh to 40 mesh, 10 or 15 parts of rigid material from 60 mesh to 80 mesh, 10 or 20 parts of rigid material from 80 mesh to 100 mesh and 15 parts of rigid material from 100 mesh to 120 mesh or 20 parts, said part of the acid-soluble composite material plugging agent is obtained by the following method: the required amount of mesh is 20 mesh to 60 mesh mineral fiber, 10 mesh to 40 mesh plant fiber, 10 mesh to 40 mesh Purpose synthetic fiber, 60-mesh to 80-mesh rigid material, 80-mesh to 100-mesh rigid material and 100-mesh to 120-mesh rigid material are mixed to obtain a partially acid-soluble composite material plugging agent.

Embodiment 3

[0026] Embodiment 3: This part of the acid-soluble compound material plugging agent, the raw materials include 10 parts of mineral fibers with a mesh number of 20 mesh to 60 mesh, 30 parts of plant fibers with a mesh size of 10 mesh to 40 mesh, and 10 mesh to 40 mesh. 5 parts of synthetic fiber, 10 parts of rigid material from 60 mesh to 80 mesh, 10 parts of rigid material from 80 mesh to 100 mesh, and 20 parts of rigid material from 100 mesh to 120 mesh. The method obtains: the required amount of mesh is mineral fiber of 20 mesh to 60 mesh, plant fiber of 10 mesh to 40 mesh, synthetic fiber of 10 mesh to 40 mesh, rigid material of 60 mesh to 80 mesh, rigid material of 80 mesh to 100 mesh After the material is mixed with a rigid material of 100 mesh to 120 mesh, a plugging agent of partially acid-soluble composite material is obtained.

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Abstract

The invention relates to the technical field of plugging agents, in particular to a partial acid-soluble compound material plugging agent and a preparation method and a use method thereof. The raw materials of the partial acid-soluble compound material plugging agent comprise mineral fiber, plant fiber, synthetic fiber and a rigid material. The performance of the partial acid-soluble compound material plugging agent is superior to the performance of the ordinary plugging agents sold in China and equivalent to the performance of foreign plugging agents, the sources of the raw materials of the partial acid-soluble compound material plugging agent are wide and the raw material cost is low, so that the production cost of the partial acid-soluble compound material plugging agent is lower than that of the foreign plugging agents, the cost performance of the partial acid-soluble compound material plugging agent is superior to the cost performance of the foreign plugging agents, and technical support is provided for improving the well leakage complex treatment efficiency.

Description

technical field [0001] The invention relates to the technical field of plugging agents, and relates to a partially acid-soluble composite material plugging agent and a preparation method and application method thereof. Background technique [0002] Downhole leakage is a phenomenon in which working fluids such as drilling fluid, cement slurry, and workover fluid in the wellbore enter underground high-permeability zones, cave formations, and natural or induced formation fractures during oil and gas well operations. The harm of downhole leakage: the decrease of liquid column pressure causes blowout; causes downhole sticking; aggravates reservoir damage and affects cementing quality; prolongs drilling cycle, increases costs, and in severe cases, oil wells are scrapped. Taking 2003 as an example, the global cost of leak prevention and plugging in drilling was as high as US$800 million, not including the cost of other downhole accidents caused by leakage. As some old oil and gas ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/46E21B33/13
CPCC09K8/426C09K8/46C09K2208/08E21B33/13
Inventor 刘敬礼赵曙光黄凯
Owner CNPC XIBU DRILLING ENG
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