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Clean self-thermogenesis pressurization reservoir reconstruction liquid and preparation method thereof

A technology for reservoir reconstruction and self-generating heat, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of lagging and unsatisfactory effects after compaction, and achieve convenient operation, simple preparation method, and good sand-carrying performance Effect

Inactive Publication Date: 2016-01-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are a large number of heavy oil reservoirs and low-pressure and low-permeability reservoirs in some oilfields in China, and the post-fracturing effect is lagging or unsatisfactory

Method used

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  • Clean self-thermogenesis pressurization reservoir reconstruction liquid and preparation method thereof
  • Clean self-thermogenesis pressurization reservoir reconstruction liquid and preparation method thereof
  • Clean self-thermogenesis pressurization reservoir reconstruction liquid and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] This embodiment provides a clean self-generating heat pressurized reservoir reforming fluid, based on the total mass of the clean self-generating heat pressurized reservoir reforming fluid as 100%, the raw material of the clean self-generating heat pressurized reservoir reforming fluid Composition includes:

[0034]

[0035] Wherein, the thickening agent is hydrophobic polyacrylamide (polymerization degree 16000), the drainage aid is drainage aid DL-8, the defoamer is nonylphenol polyoxyethylene ether, and the solid acid included in the heat generating catalyst is citric acid, The breaker is ammonium persulfate, the heat-generating booster FC is ammonium chloride, and the heat-generating booster FD is sodium nitrate.

[0036] This embodiment also provides a method for preparing the above-mentioned clean self-generating heat pressurized reservoir reforming fluid, which specifically includes the following steps:

[0037] In the state of stirring, add heat-generating s...

Embodiment 2

[0039] This embodiment provides a clean self-generating heat pressurized reservoir reforming fluid, based on the total mass of the clean self-generating heat pressurized reservoir reforming fluid as 100%, the raw material of the clean self-generating heat pressurized reservoir reforming fluid Composition includes:

[0040]

[0041] Among them, the thickener is hydrophobic polyacrylamide (the degree of polymerization is 16000), the drainage aid is DL-8, and the defoamer is alkyl Phenolic Resin Block polyether, the solid acid included in the heat-generating catalyst is ethylenediaminetetraacetic acid, the gel breaker is ammonium persulfate, the heat-generating booster FC is ammonium chloride, and the heat-generating booster FD is sodium nitrate.

[0042] This embodiment also provides a method for preparing the above-mentioned clean self-generating heat pressurized reservoir reforming fluid, which specifically includes the following steps:

[0043] In the state of stirring, ...

Embodiment 3

[0045] This embodiment provides a clean self-generating heat pressurized reservoir reforming fluid, based on the total mass of the clean self-generating heat pressurized reservoir reforming fluid as 100%, the raw material of the clean self-generating heat pressurized reservoir reforming fluid Composition includes

[0046]

[0047] Among them, the thickener is hydrophobic polyacrylamide (the degree of polymerization is 16000), the drainage aid is DL-8, the defoamer is nonylphenol polyoxyethylene ether, the solid acid included in the heat generating catalyst is oxalic acid, and the gel breaker is sodium persulfate, the heat-generating supercharger FC is ammonium chloride, and the heat-generating supercharger FD is sodium nitrate.

[0048]This embodiment also provides a method for preparing the above-mentioned clean self-generating heat pressurized reservoir reforming fluid, which specifically includes the following steps:

[0049] In the state of stirring, add heat-generatin...

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Abstract

The invention provides clean self-thermogenesis pressurization reservoir reconstruction liquid and a preparation method thereof. The mass of the clean self-thermogenesis pressurization reservoir reconstruction liquid sums up to 100%, and the clean self-thermogenesis pressurization reservoir reconstruction liquid is prepared from, by mass, 0.5 wt%-0.8 wt% of thickening agents, 0.1 wt%-0.5 wt% of discharge aiding agents, 0.1 wt%-0.3 wt% of deforming agents, 3 wt%-10wt% of thermogenesis pressurization agents FC, 4wt%-15wt% of thermogenesis pressurization agents FD, 0.5wt%-6wt% of thermogenesis catalysts, 0.3wt%-1.0wt% of cross-linking agents, 0.02wt%-0.5wt% of gel breaking agents and the balance water. The invention further provides the preparation method of the clean self-thermogenesis pressurization reservoir reconstruction liquid. The clean self-thermogenesis pressurization reservoir reconstruction liquid is clean, free of residues, low in damage to a reservoir, simple in production method and low in cost.

Description

technical field [0001] The invention relates to a clean self-generating heat pressurized reservoir transformation fluid and a preparation method thereof, belonging to the technical field of oil reservoir stimulation and transformation. Background technique [0002] There are a large number of heavy oil reservoirs and low-pressure and low-permeability reservoirs in some oilfields in China, and the post-fracturing effect is lagging or unsatisfactory. For heavy oil reservoirs, the crude oil has a high freezing point and high wax content, and a large amount of cold fluid is injected into the reservoir stimulation, which will aggravate the solidification of crude oil, reduce the conductivity of the reservoir, cause "cold damage" to the reservoir, and the effect after fracturing is even worse, and self-generated heat Pressurized fracturing fluid can generate a large amount of heat and gas under the action of the catalyst after the construction is completed, which can effectively i...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/685C09K8/665C09K8/882C09K8/885C09K8/887C09K2208/26
Inventor 王丽伟徐敏杰卢拥军车明光刘萍史静管保山崔伟香翟文刘玉婷
Owner PETROCHINA CO LTD
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