Borehole wall pressure-resistant stabilizer for workover operation and application method thereof

An application method and stabilizer technology, applied in wellbore/well components, chemical instruments and methods, earthwork drilling and production, etc., can solve the problems of oil layer pollution, damage, and large loss of well washing fluid, etc., to protect oil and gas layers, The effect of preventing leakage

Active Publication Date: 2015-12-09
SHANDONG SHENGHAI SCI & TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to aim at the defects existing in the prior art, to provide a well wall anti-pressure stabilizer and its application method for workover operations with good

Method used

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  • Borehole wall pressure-resistant stabilizer for workover operation and application method thereof

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Embodiment 1

[0024] A well wall anti-pressure stabilizer for well workover operation, which is composed of the following components: 2000g of aluminum ore powder, 3000g of sodium soil, 700g of xanthan gum, 3500g of wood fiber powder, 700g of composite polymer and 1000g of crosslinking agent. After stirring for 40 minutes, it is the finished product.

Embodiment 2

[0026] A well wall anti-pressure stabilizer for well workover operations, which consists of the following components: 2500g of aluminum ore powder, 2500g of sodium soil, 700g of xanthan gum, 3500g of wood fiber powder, 700g of composite polymer, and 1000g of a crosslinking agent. After stirring for 40 minutes, it is the finished product.

Embodiment 3

[0028] A well wall anti-pressure stabilizer for well workover operation, which is composed of the following components: 2500g of aluminum ore powder, 2700g of sodium soil, 900g of xanthan gum, 3300g of wood fiber powder, 500g of composite polymer and 1000g of crosslinking agent. After stirring for 40 minutes, it is the finished product.

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Abstract

The invention discloses a borehole wall pressure-resistant stabilizer for workover operation. The borehole wall pressure-resistant stabilizer is prepared by mixing the following components in parts by weight: 20 to 30 parts of aluminum ore powder, 30 to 40 parts of sodium soil, 5 to 9 parts of xanthan gum, 32 to 44 parts of wood fiber powder, 5 to 10 parts of composite polymer, and 0.5 to 1 part of crosslinking agent. The stabilizer can be added into fresh water or seawater and then fully mixed and aged to form a temporary plugging liquid, and the concentration of stabilizer in the temporary plugging liquid is controlled in a range of 6-10%. The provided stabilizer can greatly improve the anti-permeability performance of flushing fluid or well killing liquid; the pressure resistant strength can reach 8 MPa or more, in the indoor experiments the pressure resistant strength can reach 16 MPa or more; the leakage of flushing liquid and filtrate thereof to the deep ground is effectively prevented, the ground and flushing liquid are completely separated, zero-loss operation can be achieved, and the hydrocarbon reservoir is effectively protected.

Description

technical field [0001] The invention relates to the technical field of petroleum production and development, in particular to a well wall anti-pressure stabilizer for preventing the leakage of well flushing fluid or well killing fluid in well operation and workover and an application method thereof. Background technique [0002] Petroleum development is accomplished by numerous oil production wells and water injection wells. Shandong Shengli Oilfield alone has invested in the development of 68 oil and gas fields, with more than 20,000 oil wells and nearly 8,000 water injection wells. Due to geological or engineering reasons, the number of oil wells that cannot produce normally accounts for a considerable proportion. Therefore, the number of workover operations is not only heavy, but some oil wells are difficult to work over and the workover period is long. The first step in the workover operation is to wash the well and kill the well. The purpose is to prevent the oil and ...

Claims

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Application Information

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IPC IPC(8): C09K8/514C09K8/512E21B33/13
CPCC09K8/512C09K8/514E21B33/13
Inventor 冯时林马世民马鹏呈
Owner SHANDONG SHENGHAI SCI & TRADE CO LTD
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