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Blockage degree assessment method and device

A technology of degree and depth, applied in the field of plugging degree evaluation methods and devices, can solve problems such as inaccurate evaluation results of plugging conditions, and achieve the effect of improving construction effect and accuracy

Active Publication Date: 2017-08-11
PETROCHINA CO LTD
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Problems solved by technology

[0004] The present invention provides a plugging degree evaluation method and device, which are used to solve the problem of inaccurate blocking evaluation results in the prior art

Method used

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  • Blockage degree assessment method and device
  • Blockage degree assessment method and device

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Embodiment Construction

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] figure 1 A flowchart of an embodiment of the blocking degree evaluation method provided by the present invention, such as figure 1 shown, including:

[0053] 101. Before injecting the profile control and displacement agent into the water injection well, obtain the following static parameters: the reservoir static pressure of the wate...

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Abstract

The invention provides a blockage degree assessment method and device. The method comprises the steps that before a profile control and displacement agent is injected into a water injection well, static parameters, including oil reservoir static pressure of the water injection well, an inner diameter of an operating tool string in the water injection well and middle depth of a layer which the agent is about to be injected into are acquired; while the profile control and displacement agent is injected into the water injection well, a dynamic data sequence of changes of parameters, including injection pressure of the profile control and displacement agent, displacement of the water injection well, density of the profile control and displacement agent and viscosity of the profile control and displacement agent over time is collected; and a dynamic data sequence of friction losses of the profile control and displacement agent in the water injection well is calculated according to the parameters, a dynamic data sequence of dynamic inhalation indexes is calculated, and the blockage degree is assessed according to the dynamic data sequence of the dynamic inhalation indexes. Due to the fact that influences of displacement changes of the water injection well are considered in the dynamic data sequence of the dynamic inhalation indexes, the accuracy of blockage degree assessment is improved, and the construction effect is improved.

Description

technical field [0001] The invention relates to the technical field of oil recovery technology, in particular to a plugging degree evaluation method and device. Background technique [0002] At present, profile control and flooding are an important technology to enhance oil recovery in the late stage of water flooding development of clastic rock reservoirs. Both profile control and flood control are technical measures to improve the effect of water flooding by blocking the high-permeability dominant channels in the formation to activate the low-permeability areas. The difference is that the profile control agent has a short action distance and focuses on solving interlayer conflicts; while the profile control agent has a deeper action distance on the formation, which can solve both plane contradictions and interlayer contradictions. Effective plugging of high-permeability dominant channels in the formation is a key factor to ensure the effect of profile control and flooding...

Claims

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Application Information

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IPC IPC(8): G06F17/50E21B43/20
CPCE21B43/20G06F30/20
Inventor 王鹏任今明袁泽波徐海霞庹维志李杨
Owner PETROCHINA CO LTD
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