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Method for diagnosing oil (gas) production position of fishbone-shaped multi-branch horizontal well and system thereof

A diagnostic method and multi-branch technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve unsatisfactory problems, achieve the effects of improving production efficiency, reducing costs, and reducing the number of corrections

Active Publication Date: 2016-05-04
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

This invention patent also fails to meet the requirement that the well test interpretation is in line with the actual seepage conditions of the reservoir

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  • Method for diagnosing oil (gas) production position of fishbone-shaped multi-branch horizontal well and system thereof
  • Method for diagnosing oil (gas) production position of fishbone-shaped multi-branch horizontal well and system thereof
  • Method for diagnosing oil (gas) production position of fishbone-shaped multi-branch horizontal well and system thereof

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Embodiment 2

[0275] According to another embodiment of the method for diagnosing the oil (gas) production position of the fishbone-shaped multi-branched horizontal well of the present invention and its system, its principles, steps, devices and beneficial effects are all the same as those in Embodiment 1, except that: The step of fitting the flow rate of some branch wells is also included between the step 4 and the step 5, which is in sequence: (1) monitoring the flow rate of the i-th branch well and the i+1-th branch well , taking the measured flow rate of the branch well as the known value, select the pressure monitoring interpretation model to fit the measured bottomhole pressure, and explain the flow rate of the remaining branch wells through the history fitting of pressure and pressure derivative; (2) monitor the i-th For the flow rates of the branch wells in the +1 section and the branch wells in the i+2 section, the measured flow rate of the branch wells is used as the known value to...

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Abstract

The invention relates to a method for diagnosing an oil (gas) production position of a fishbone-shaped multi-branch horizontal well. The method comprises the following steps: measuring bottom hole pressures within a period of well closure time to obtain a change relation of a bottom hole pressure difference and time; determining an initial parameter of a pressure monitoring interpretation model according to logging well completion data and the flow monitoring results of a part of branch wells; and comparing whether the change relation of the bottom hole pressure difference and time is equal to a preset relation, if so, executing a next step, and if not, correcting the change relation to obtain an actually measured pressure calculation parameter, so as to diagnose the length, the position and the flow of each oil (gas) production branch well. The invention further relates to a diagnostic system, comprising a pressure measurement unit, a judgment unit, a pressure calculation parameter processing unit, a pressure monitoring control unit, a logging well completion data processing unit and a flow monitoring result processing unit of a part of branch wells. The method and the system are used for directionally regulating well stimulation by considering the influence of oil production or gas production nonuniformity of the branch wells.

Description

technical field [0001] The invention belongs to the technical field of oil and gas reservoir development, and in particular relates to a method and system for diagnosing the oil (gas) production position of a fishbone multi-branched horizontal well. Background technique [0002] Fishbone multi-branch horizontal wells have important strategic significance and economic benefits in terms of increasing recoverable reserves, increasing single well production, reducing production costs, and developing complex oil and gas reservoirs. Therefore, pressure monitoring, Effect evaluation and production stimulation transformation have become hot issues in the field of oil and gas reservoir development today. Pressure monitoring is a technique for understanding formation characteristics in the development of modern oil and gas reservoirs. [0003] In actual production, the oil or gas production of fishbone multi-lateral wells along the branch wells of each segment and the entire main wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q50/02
CPCG06F30/20G06Q50/02
Inventor 程时清黄瑶何佑伟于海洋
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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