Preparation method of low temperature stratum self generating gas deblocking agent and deblocking technology

A technology for removing plugging agents and formations, which is applied in the fields of fluid production, earth-moving drilling, wellbore/well components, etc. It can solve the problems of large endothermic effect, affecting the improvement of steam injection efficiency, affecting crude oil production, etc., and achieve cost-saving. Effect

Inactive Publication Date: 2005-11-09
DONGYING HAODE GASOLINEEUM NEW TECH DEV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a self-generated gas plugging removal agent in low-temperature formations and a plugging removal process to solve the problem of large heat absorp

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  • Preparation method of low temperature stratum self generating gas deblocking agent and deblocking technology
  • Preparation method of low temperature stratum self generating gas deblocking agent and deblocking technology
  • Preparation method of low temperature stratum self generating gas deblocking agent and deblocking technology

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Embodiment Construction

[0047] In order to further disclose the technical solution of the present invention, the following will be described in detail through examples in conjunction with the accompanying drawings:

[0048] The preparation method and deblocking process of the self-generated gas blocking agent in low-temperature formation of the present invention are composed of A agent, B agent and C catalyst. The mixture of agent, C catalyst and clear water is injected into the oil layer, and C catalyst catalyzes the chemical reaction of agent A and agent B to produce new substances in the formation, and uses the heat energy generated during the reaction and the low-carbon mixed organic acid generated to remove various blockages in the oil layer, increasing Reservoir energy, reduce crude oil viscosity to increase oil well production.

[0049] The formula of agent A is hydrochloric acid: glacial acetic acid: phosphoric acid: mutual solvent: water = 15%: 5%: 5%: 3%: 7.3% (mass percentage), mixed and s...

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Abstract

This invention discloses a a preparation method of low temperature stratum self generating gas deblock agent. It is made up by A medicament, B medicament and C catalyst. A medicament is made up by hydrochloric acid, glacial acetic acid, phosphoric acid, mutual solvent, and they are mixed in room temperature to uniform solution, the quality content is that hydrochloric acid 15-18%, glacial acetic acid 5-2%, phosphoric acid 5-2%, mutual solvent 3-1% water 72-70%. B is made up by dicyandiamide, ammonium nitrate, urea, and they are agitated for 5 hours in reaction tank at the temperature below 50 degrees centigrade, and then they are crystallized and filtrated, the quality content is that dicyandiamide 35.8-33.8%, ammonium nitrate 34.-32.2%, urea 30-28%. Catalyst C is a molybdenum contain oxide, its addition quality is 0.1-0.3%. A, B and C are mixed as quantity rate 10-8 to 1-2 to 0.1-0.3 when they are used, but B and C are mixed first with four times water.

Description

1. Technical field [0001] The invention relates to a preparation method and a plugging removal process of a self-generated gas plugging agent in low-temperature formations used in oilfield development to increase crude oil output. 2. Background technology [0002] At home and abroad, using liquid CO injection 2 , Formation high temperature self-generated CO 2 , mixed gas flooding, foam immiscible flooding and other technologies to enhance oil recovery have achieved remarkable results in field application. However, injection of liquid CO 2 While improving the huff and puff effect, its heat absorption effect greatly affects the utilization of steam injection energy and seriously affects the unit steam injection efficiency; while the high-temperature self-generated CO 2 Auxiliary discharge technology requires high temperature to react, and also has the effect of endothermic effect. Both technologies have limitations in application and promotion, and relatively high mining c...

Claims

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Application Information

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IPC IPC(8): E21B43/27
Inventor 臧宝仁韩宾
Owner DONGYING HAODE GASOLINEEUM NEW TECH DEV
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