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Application of degradable fibers in invert emulsion fluids for kill pills

A technology of inverse emulsification and well killing, which is applied in the direction of drilling equipment, drilling compositions, chemical instruments and methods, and can solve problems affecting the production of hydrocarbons or other fluids, clogging, etc.

Inactive Publication Date: 2012-07-11
PRAD RES & DEV LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While kill fluids are important for completion operations, such barriers can significantly affect the production of hydrocarbons or other fluids from the well if, for example, rocky formations are consistently plugged through such barriers

Method used

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  • Application of degradable fibers in invert emulsion fluids for kill pills
  • Application of degradable fibers in invert emulsion fluids for kill pills
  • Application of degradable fibers in invert emulsion fluids for kill pills

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Embodiment Construction

[0017] First, it should be noted that in the development of any practical implementation, many application-specific decisions must be made to achieve the developer's specific goals, such as compliance with system-related and business-related constraints, which vary from application to application. Moreover, it will be appreciated that such a developmental effort was complex and time consuming, but would nevertheless nonetheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure. The description and examples are given solely for the purpose of illustrating preferred embodiments of the invention and should not be considered as limiting the scope and applicability of the invention. Although the compositions of the present invention are described herein as comprising some materials, it should be understood that the composition may optionally comprise two or more chemically distinct materials. In addition, the composition may also ...

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Abstract

A method of treating a subterranean formation includes pumping into a cased, perforated wellbore that intersects the formation an invert emulsion kill fluid, the invert emulsion kill fluid comprising: an oleaginous continuous phase; a non- oleaginous discontinuous phase; an emulsifier; at least one degradable material; and at least one bridging material; contacting the formation with the kill fluid; and allowing the degradable material to at least partially degrade.

Description

technical field [0001] Embodiments disclosed herein relate generally to kill fluids used in the completion of oil and gas wells. Background technique [0002] Killing fluids are typically placed within the wellbore during oilfield wellbore operations, such as wellbore inauguration, to kill the well, ie, prevent formation fluids from overflowing into the wellbore when the well is open, and to prevent loss of wellbore fluids to the formation. The kill fluid typically remains within the wellbore throughout the operation. [0003] Conventional kill fluids known in the art are generally aqueous liquids containing weighting agents such as inert inorganic solids in solution or suspension to increase the density of the fluid. The weighted kill fluid exerts a hydrostatic pressure on the formation fluid that is greater than the pressure exerted by the formation fluid attempting to invade the wellbore. This unbalanced hydrostatic pressure prevents the ingress of formation fluids duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/36C09K8/32E21B7/00
CPCC09K8/36
Inventor O·巴斯托斯S·艾丽C·恩古延
Owner PRAD RES & DEV LTD