High-temperature-resistant emergency plugging material and application thereof

A leakage plugging material and high temperature resistance technology, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems such as the inability to meet the technical requirements of deep high temperature leakage plugging and the high temperature resistance performance of the leakage plugging material is not considered.

Pending Publication Date: 2020-09-22
CNOOC TIANJIN BRANCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it does not consider the high temperature resistance of the plugging material, which cannot meet the technical requirements of deep high temperature plugging.

Method used

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  • High-temperature-resistant emergency plugging material and application thereof
  • High-temperature-resistant emergency plugging material and application thereof
  • High-temperature-resistant emergency plugging material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The prepared "small leak" anti-high temperature emergency plugging formula includes the following components by mass:

[0039] 11 parts of rigid calcium carbonate particles (20-160 mesh), 4 parts of elastic graphite particles (40-160 mesh), 0.15 parts of high temperature resistant fiber (3mm).

Embodiment 2

[0041] The prepared "medium leakage" anti-high temperature emergency plugging formula includes the following components by mass:

[0042] 16 parts of rigid calcium carbonate particles (10-160 mesh), 6 parts of elastic graphite particles (20-160 mesh), 0.25 parts of high temperature resistant fiber (3mm).

Embodiment 3

[0044] The prepared "big leak" anti-high temperature emergency plugging formula includes the following components by mass:

[0045] 4 parts of rigid calcium carbonate particles (8-10 mesh), 14 parts of rigid calcium carbonate particles (10-160 mesh), 5 parts of elastic graphite particles (10-160 mesh), 2 parts of mica flakes (20-40 mesh), High temperature fiber (6mm) 0.4 parts.

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PUM

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Abstract

The invention discloses a high-temperature-resistant emergency plugging material and application thereof. The high-temperature-resistant emergency plugging material comprises the following componentsby mass: 4-20 parts of rigid calcium carbonate particles, 4-6 parts of elastic graphite particles, 0-3 parts of mica sheets and 0.15-0.4 part of high-temperature-resistant fiber. According to the emergency plugging formula provided by the invention, the addition amount and the mesh number of the high-temperature-resistant plugging agent can be automatically adjusted according to different leakagedegrees for plugging in allusion to deep high-temperature blocks; the high-temperature-resistant plugging material has the advantages of favorable pressure bearing capacity, lower gas flowback pressure and good acid dissolution effect, and can satisfy the on-site high-temperature plugging requirements.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to a high-temperature resistant emergency leakage plugging material and its application. Background technique [0002] Lost circulation is a downhole complex situation in which the fluid in the well is lost from the wellbore to the formation under the action of pressure difference in the process of oil exploration and development. This complex situation generally exists in the process of drilling and completion. Lost circulation will not only prolong the drilling cycle and increase drilling costs, but also may cause a series of problems such as pipe sticking, blowout, and well wall instability. The plugging material is an important factor in the plugging operation, and its performance and matching ability directly determine the success rate of plugging. Common plugging materials mainly include bridging plugging materials, high water loss plugging materials, temporary plugging ...

Claims

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Application Information

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IPC IPC(8): C09K8/42C09K8/467
CPCC09K8/426C09K8/467C09K2208/08
Inventor 李中冯桓榰刘书杰范白涛幸雪松吴怡邢希金邱正松赵欣钟汉毅
Owner CNOOC TIANJIN BRANCH
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