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Temporary plugging agent for high-sulfur gas well testing and production operation

A temporary plugging agent and gas well technology, which is applied in the field of temporary plugging agent for high-sulfur gas well test gas production operation, can solve the problems of weak temporary plugging layer strength, enrichment and residence in the perforated section, small particle size, etc., and achieve protection reservoir effect

Inactive Publication Date: 2016-03-02
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the above-mentioned defects of the existing temporary plugging material with small particle size, unable to enrich and reside in the perforation section, the formed temporary plugging layer is weak in strength, and unable to meet the long-term high temperature requirement, and provides a high-sulfur gas well Temporary plugging agent for gas test and production operation

Method used

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  • Temporary plugging agent for high-sulfur gas well testing and production operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Water-absorbing resin: add 12g acrylic acid (AA) to 300g water, adjust the pH value, add 48g acrylamide (AM) and stir evenly, then add 20g bentonite and 20g silicon powder and stir evenly, then add initiator and crosslinking agent to polymerize into a gel blocks, cut and granulated to obtain water-absorbent resin.

[0019] The above-mentioned water-absorbent resin is mixed with 10% (mass ratio) + 60% sepiolite + 25% wollastonite wool + 5% xanthan gum to obtain a temporary plugging agent for gas well testing and production operation of high-sulfur gas wells.

[0020] Other specific examples were prepared according to the components given in Table 1.

[0021] Table 1 Examples of temporary plugging agents for gas well testing and production operation in high-sulfur gas wells

[0022]

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PUM

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Abstract

The invention relates to a high sulfur-containing gas well gas testing commissioning operation temporary plugging agent, concretely relates to the temporary plugging agent for guaranteeing operation construction safety and protecting a reservoir during a high sulfur-containing gas well gas testing commissioning operation process, the temporary plugging agent consists of a swelling material, a bridging material, a filling material and a suspending agent. By temporarily blocking a canon eye near bore zone by the temporary plugging agent, the complex cases of well leakage or overflow due to a lower tubing string during the high sulfur-containing gas well gas testing commissioning operation can be effectively avoided, the reservoir can be protected, acid dissolution rate of the formed temporary plugging agent is greater than 90%, the temporary blockage strength is greater than 10 MPa, and the expiration date of high temperature (130 DEG C) can reach more than 15 days.

Description

technical field [0001] The invention relates to a temporary plugging agent for gas testing and production operation of high-sulfur gas wells, in particular to a temporary plugging agent for ensuring operation safety and reservoir protection during gas testing and production operation of high-sulfur gas wells. Background technique [0002] For high-sulfur gas wells with complex reservoir pressure systems, narrow safety windows of multi-pressure systems, large reservoir spans, and large differences in physical properties, the production test and subsequent operation of the perforating string and production string should be performed after the gas layer is drilled. Among them, the pressure surge caused by the tripping string may easily lead to downhole complex situations such as pressure leak formation or gas invasion, and serious downhole complexities such as well kick or even blowout; in order to effectively prevent formation loss or For complex downhole conditions such as ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/512
Inventor 王寿平郭建华李旭东田军何伟杨建赵志超刘云飞孙善刚吴健刘光成
Owner CHINA PETROCHEMICAL CORP
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