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Production decline analysis method for narrow river channel reservoir

A technique of diminishing yield and analytical methods, applied in special data processing applications, instruments, electrical digital data processing, etc.

Active Publication Date: 2018-11-30
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Description
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Problems solved by technology

At present, there is no production decline analysis method specially used for narrow channel oil and gas reservoirs

Method used

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  • Production decline analysis method for narrow river channel reservoir
  • Production decline analysis method for narrow river channel reservoir
  • Production decline analysis method for narrow river channel reservoir

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Embodiment Construction

[0094] The present invention will be described in further detail below in conjunction with the examples, but the embodiments of the present invention are not limited thereto.

[0095] figure 1 The flow chart of the production decline analysis method for narrow channel reservoirs according to the present invention is shown. like figure 1 Shown, the production decline analysis method of a kind of narrow channel reservoir provided by the present invention, the method comprises:

[0096] Step 1: For a vertical well with a vertical fracture in a narrow channel reservoir, establish a physical model according to the reservoir conditions and fracture parameters;

[0097] Step 2: coupling of fracture model and formation model;

[0098] Step 3: The coupling solution of the fracture model and the formation model, by discretizing the fracture into N equal-length uniform flow sections, using the superposition principle to obtain the dimensionless pressure of each discrete section, and c...

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Abstract

The invention provides a production decline analysis method for a narrow river channel reservoir. The method includes establishing a physical model according to the reservoir condition and fracture parameters; coupling a fracture model and a stratum model; coupling and solving the fracture model and the stratum model, dispersing a fracture into N equal-length uniform flow segments, coupling and solving a reservoir analytical model and a fracture discrete model by using the superposition principle through the fracture wall surface flow and the pressure continuity conditions; adopting a direct calling circular closed reservoir F function to calculate a fracture conductivity influence function and establish a normalized fracture conductivity function and a new model for calculating a quasi-steady-state constant bDpss of finite-flow fractures; plotting a new pattern of vertical fracture well production decline in a circular closed reservoir based on the new model for calculating the quasi-steady-state constant bDpss of finite-flow fractures. The new pattern of production decline is applied in the production decline analysis. According to the method, the pressurized gas well productionanalysis accuracy is improved, and the method is applicable to mine applications.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas exploitation, in particular to the field of productivity evaluation of oil and gas reservoirs, in particular to a production decline analysis method for narrow channel reservoirs. Background technique [0002] The production decline analysis of oil and gas reservoirs is an efficient method for analyzing the actual production data of oil and gas wells. The effective production data of oil and gas wells can be fitted and analyzed by using the dimensionless production decline curve chart, and some parameters of production wells and reservoirs can be quickly calculated. For example, original geological reserves, control area, effective permeability, etc., and then oil and gas wells and reservoirs can be evaluated. There are a lot of journal documents published at home and abroad about the production decline analysis methods of oil and gas reservoirs. Among the various oil and gas reservoir pr...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q50/02
CPCG06F30/20G06Q50/02
Inventor 罗万静姚彦斌崔玉东彭越卢斌田青
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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