Acid-in-oil stuck freeing fluid and production method and use method thereof

An acid hydrolysis and oil-in-oil technology, which is applied in the field of jam release agents, can solve the problems of extreme pressure differential sticking and unjamming, a large number of tools, equipment and processing time, and increased drilling costs, so as to achieve increased speed, short time, and reduced loss effect

Active Publication Date: 2012-07-04
KARAMAY AOZE IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary pressure differential stuck pipe can be unstuck by using conventional oil-based fixed-section injection technology, but extreme pressure differential stuck pipe cannot be unstuck
Dealing with this kind of stuck pipe accidents usually requires operations such as shocking, sticking, explosion loosening, casing washing and fishing, etc., which requires a lot of tools, equipment and processing time (generally takes more than 7 days), resulting in an increase in drilling costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1, the oil-in-acid solution consists of hydrochloric acid by weight percentage: the water phase is hydrochloric acid, and the oil phase is diesel oil, specifically: 1% to 28% hydrochloric acid; 40% to 60% diesel oil; 1% to 6% % crude oil activator; 1% to 5% corrosion inhibitor; 1% to 2% iron ion stabilizer; the rest is water. The results of inspection by Xinjiang Uygur Autonomous Region Petroleum Drilling Auxiliary Products Quality Supervision and Inspection Station are as follows:

[0019] project

Embodiment 2

[0020] Example 2, the oil-in-acid hydrolysis card solution is composed by weight percentage: the water phase is earth acid, and the oil phase is diesel oil; specifically: 1% to 28% hydrochloric acid; 0.5% to 6% hydrofluoric acid; 40 % to 60% diesel oil; 1% to 6% crude oil activator; 1% to 5% corrosion inhibitor; 1% to 2% iron ion stabilizer; the rest is water. The results of inspection by Xinjiang Uygur Autonomous Region Petroleum Drilling Auxiliary Products Quality Supervision and Inspection Station are as follows:

[0021] project

Embodiment 3

[0022] Example 3, the oil-in-acid hydrolysis card solution is composed by weight percentage: the water phase is naphthenic acids, and the oil phase is diesel oil; specifically: 1% to 30% naphthenic acid; 40% to 60% diesel oil; 1% to 6% crude oil activator; 1% to 5% corrosion inhibitor; 1% to 2% iron ion stabilizer; the rest is water. The results of inspection by Xinjiang Uygur Autonomous Region Petroleum Drilling Auxiliary Products Quality Supervision and Inspection Station are as follows:

[0023] project

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PUM

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Abstract

The invention relates to the technical field of stuck freeing agents used in oilfield drilling production, in particular to an acid-in-oil stuck freeing fluid and a production method and a use method thereof. The acid-in-oil stuck freeing fluid comprises the components as follows: acid, diesel oil, a crude oil activating agent, an inhibitor, an iron ion stabilizing agent and balance of water. Theacid-in-oil stuck freeing fluid and a mud cake can instantaneously generate a chemical reaction to destroy the chemical structure of the mud cake and release ordinary differential sticking or extremedifferential sticking; a stuck freeing method has no adverse influence on the performance of a drilling fluid, no damage to a drilling string or a well wall, and the characteristics of short time andrapid effect taking, thereby greatly improving the speed for processing such accidents, saving time and reducing loss.

Description

technical field [0001] The invention relates to the technical field of a jam release agent used in oil field drilling production, and relates to an acid-in-oil jam release fluid and a production method and use method thereof. Background technique [0002] In recent years, with the continuous development of the oilfield industry, the drilling task has become more and more difficult. The drilling depth has gradually developed to medium-deep wells, deep wells and ultra-deep wells. Ultra-deep directional wells and short-radius horizontal wells have also gradually increased, making drilling more difficult. , Drilling equipment and engineering technology requirements are high, and many formations are prone to pressure differential sticking, which accounts for the largest proportion of drilling sticking accidents. Differential pressure sticking is usually solved by injecting oil-based fluid at fixed intervals, mainly soaking in crude oil, diesel oil or jam-releasing fluid, so as to...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C09K8/00E21B31/00
Inventor谢军余佳水刘涛光付建国李建国倪红霞
OwnerKARAMAY AOZE IND & TRADE