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Method of inhibiting or controlling release of well treatment agent

A technology for well treatment and fluid treatment, which is applied in the field of inhibiting or controlling the release of well treatment agents, and can solve problems such as clogging well pipes, reducing well productivity, and reducing formation permeability

Inactive Publication Date: 2014-03-05
BAKER HUGHES HLDG LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formation and deposition of this unwanted contaminant reduces the permeability of the formation and reduces the productivity of the well, and in severe cases can completely plug the well tubing

Method used

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  • Method of inhibiting or controlling release of well treatment agent
  • Method of inhibiting or controlling release of well treatment agent
  • Method of inhibiting or controlling release of well treatment agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Example 1. The release rate of a water-in-oil microemulsion containing β-mannanase (commercially available as GBW-12CD from Baker Hughes Incorporated) was compared to an aqueous fluid; Breaker (commercially available from Baker Hughes Incorporated) and hemicellulase (commercially available from Baker Hughes Incorporated as enzyme GBW-15C) in guar-based fluids containing the same enzyme. The test was performed at the same temperature using the same concentration to demonstrate the effect of the well treatment agent in a water-in-oil microemulsion compared to the well treatment agent in an aqueous fluid. The oil phase of the microemulsion was composed of about 56% by volume of a surfactant mixture of polyoxyethylene sorbitan monopalmitate and ethoxylated castor oil and about 34% by volume of d-limonene. The microemulsion contained 6% Enzyme G, 8% Enzyme GBW-15C. An aqueous solution containing 6% Enzyme G and 8% Enzyme GBW-15C was also prepared.

[0084] A linear gel w...

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Abstract

A microemulsion delivery system containing a well treatment agent in a water-in- oil microemulsion may be used for well remediation as well as in other treatment operations including stimulation, acidizing, and drilling. In addition, the water-in-oil microemulsion delivery system may be used to clean surface equipment and downhole equipment.

Description

technical field [0001] The invention relates to a method of inhibiting or controlling the release rate of a well treatment agent in an underground formation, oil well, gas well, geothermal well, flow pipe or container by introducing a well treatment agent into the formation, well, flow pipe or container microemulsion of the agent. Background technique [0002] In the treatment of oil, gas and geothermal wells and / or subterranean formations penetrated by the well, it is important to deliver the well treatment agent into the defined target area. Well fluids are typically complex mixtures of aliphatic hydrocarbons, aromatic hydrocarbons, heteroatom molecules, anionic and cationic salts, acids, sands, silts, clays, and numerous other components. The nature of these fluids, combined with the harsh conditions of heat, pressure and turbulence to which they are often exposed, is a major contributor to the formation and deposition of contaminants such as scale, salt, paraffin, corro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/28C09K8/36C09K8/035C09K8/52C09K8/60
CPCC09K8/035C09K8/602C09K8/52C09K8/36C09K2208/24C09K8/28
Inventor K·卡威泽尔D·V·S·古普塔
Owner BAKER HUGHES HLDG LLC
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