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A Well Productivity Evaluation Method in Shady Dolomite Reservoirs Considering the Effects of Multiple Factors

An evaluation method and multi-factor technology, applied in earthwork drilling, wellbore/well components, instruments, etc., can solve the problems that cannot be solved, such as the change law of permeability of argillaceous dolomite reservoirs and the change law of oil well productivity

Inactive Publication Date: 2020-11-24
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of the variation law of the permeability of the argillaceous dolomite reservoir and the analysis technology of the variation law of the oil well productivity that cannot be solved in the prior art, and to provide a kind of argillaceous dolomite reservoir considering the influence of multiple factors Oil well productivity evaluation method

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  • A Well Productivity Evaluation Method in Shady Dolomite Reservoirs Considering the Effects of Multiple Factors
  • A Well Productivity Evaluation Method in Shady Dolomite Reservoirs Considering the Effects of Multiple Factors
  • A Well Productivity Evaluation Method in Shady Dolomite Reservoirs Considering the Effects of Multiple Factors

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Embodiment Construction

[0038] The technical scheme of a method for evaluating the productivity of oil wells in argillaceous dolomite reservoirs in consideration of the influence of multiple factors of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] figure 1 It is a flow chart of a method for evaluating the productivity of oil wells in argillaceous dolomite reservoirs considering the influence of multiple factors, which specifically includes the following steps:

[0040] Step 1: Obtain the basic parameters of the target argillaceous dolomite reservoir;

[0041] Step 2: Obtain the relationship equation between core permeability and stress through the core stress sensitivity experiment, and establish a permeability change model of the target argillaceous dolomite reservoir considering stress sensitivity based on the relationship equation between the core permeability and stress ;

[0042] Step 3: Obtain the threshold pressure gradient va...

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Abstract

The invention provides an argillaceous dolomite oil reservoir oil well productivity evaluation method taking multi-factor influences into consideration. The method mainly comprises the following stepsthat basic parameters of a target argillaceous dolomite oil reservoir are acquired, a relation equation of the rock core permeability and the stress is obtained through rock core stress sensitive experiments, and a target argillaceous dolomite oil reservoir permeability change model is established by taking stress-sensitive into consideration based on the relation equation of the rock core permeability and the stress; a steady-state seepage model is established by taking the starting pressure into consideration; the steady-state seepage model of the starting pressure is considered accordingto the permeability change model, a target argillaceous dolomite oil well productivity evaluation model is established by taking the multi-factor influences into consideration; and the oil well productivity change is predicted by adopting a quantitative analysis method according to the target mud dolomite oil reservoir oil well productivity evaluation model. The method can be used for predicting the permeability distribution of the argillaceous dolomite oil reservoir with the stress sensitive effect and the starting pressure gradient and evaluating the oil well productivity, and has guiding significance on the development of the argillaceous dolomite oil reservoir.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir development, and more specifically relates to a method for evaluating the productivity of an oil well in an argillaceous dolomite reservoir considering the influence of multiple factors. Background technique [0002] With the deepening of oil and gas exploration and development, the targets of exploration and development have gradually shifted from conventional oil and gas fields to unconventional new fields. Argillaceous dolomite reservoirs, as a kind of potential reserves, have attracted more and more attention. Like ordinary low-permeability oil and gas fields, the development of argillaceous dolomite reservoirs is usually accompanied by stress-sensitive effects. Fatt and Davis first studied the stress sensitivity characteristics of reservoir rock permeability, and put forward the reservoir stress sensitivity for the first time. In recent years, a large number of studies have sho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20E21B49/00G06F119/14
CPCE21B49/00
Inventor 鞠斌山田亚鹏刘楠马帅董银涛
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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