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Evaluation Method of Drilling Fluid Consolidated Borehole Wall Breaking Surrounding Rock Ability

A technology of crushing surrounding rock and evaluation method, applied in wellbore/well components, earthwork drilling, etc., can solve the problems of inaccurate evaluation results of drilling fluid stable well wall performance, and achieve the effect of reliable mechanical parameters and efficient drilling

Active Publication Date: 2021-03-23
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a method for evaluating the ability of the drilling fluid to consolidate the well wall to break the surrounding rock, which solves the problem of inaccurate evaluation results of the performance of the drilling fluid stabilizing the well wall

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  • Evaluation Method of Drilling Fluid Consolidated Borehole Wall Breaking Surrounding Rock Ability
  • Evaluation Method of Drilling Fluid Consolidated Borehole Wall Breaking Surrounding Rock Ability
  • Evaluation Method of Drilling Fluid Consolidated Borehole Wall Breaking Surrounding Rock Ability

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Embodiment Construction

[0033] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0034] Such as figure 1 As shown, an evaluation method for the ability of drilling fluid to consolidate the borehole wall to break the surrounding rock includes the following steps:

[0035] S1. Obtain a fresh and complete downhole drilling coring with the same lithology as the broken formation, and drill a cylindrical sample. The diameter of the cylindrical sample is 50mm and the length is 50mm. For two disk samples with ...

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Abstract

The invention discloses an evaluation method for the ability of drilling fluid to consolidate the borehole wall to break surrounding rock. The method for evaluating the ability of the drilling fluid to consolidate the well wall to break the surrounding rock provided by the present invention realizes the quantitative evaluation of the drilling fluid to improve the shear strength between the broken blocks, and provides reliable mechanical parameters for the stability of the well wall in the fractured formation. At the same time, it also provides scientific and effective experimental methods for drilling fluid performance optimization and drilling fluid optimization, and provides strong support for the establishment of wellbore stabilization system technology in fractured formations, which is of great significance to safe and efficient deep oil and gas drilling.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to an evaluation method for the ability of drilling fluid to consolidate a well wall and break surrounding rock. Background technique [0002] As the depth of oil and gas exploration and development continues to increase, oil and gas drilling often encounters broken formations, and wellbore instability such as block loss, collapse, and leakage in broken formations has become a major problem commonly faced by deep oil and gas drilling. On the basis of improving the inhibition and plugging performance of drilling fluid, strengthening the consolidation ability of drilling fluid to the broken surrounding rock is the most effective technical means to minimize and avoid the instability and collapse of the wellbore wall in fractured formations. Therefore, the scientific and reasonable evaluation of the drilling fluid’s ability to cement and consolidate the broken confining pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
CPCE21B49/005
Inventor 梁利喜刘向君熊健
Owner SOUTHWEST PETROLEUM UNIV
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