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Method and device for predicting capacity of fissure-hole type oil deposit

A fracture and reservoir technology, applied in the field of productivity prediction, which can solve problems such as difficult interpretation and prediction

Active Publication Date: 2015-01-21
PETROCHINA CO LTD
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Problems solved by technology

This inversion of the capacity curve is difficult to explain and predict with a single medium capacity equation

Method used

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  • Method and device for predicting capacity of fissure-hole type oil deposit
  • Method and device for predicting capacity of fissure-hole type oil deposit
  • Method and device for predicting capacity of fissure-hole type oil deposit

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. 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.

[0049] For fracture-porous reservoirs, it is quite difficult to determine the productivity of a single well. The conventional productivity equation only considers bottom-hole degassing or stress sensitivity alone, which can only meet the calculation of reservoir productivity in a single medium, without considering the matrix. Due to the composite seepage system of reservoir and matrix fracture reservoir and the influence of fracture closure due to stress...

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Abstract

The invention relates to a method and a device for predicting the capacity of a fissure-hole type oil deposit. The method includes the steps of acquiring oil deposit bubble point pressure Pb, a volumetric factor B, in-place oil viscosity mu, the shaft radius rw, the oil reservoir thickness h, matrix permeability Km, fissure permeability Kf, oil deposit supply boundary pressure Pe, the boundary radius re, shaft bottom flow pressure Pw, a matrix permeability damage factor alpha m, a double-medium reservoir permeability damage factor alpha A and fissure closing pressure Pf. Fissure-hole type double-medium reservoir permeability KA is obtained according to the matrix permeability Km and the fissure permeability Kf; on the basis of permeation fluid mechanics, the stratum fissure closed radius rf is obtained by the acquired parameters; on the basis of inner and outer boundary conditions and reservoir permeability stress sensitive effects, the relation between the capacity of the fissure-hole type oil deposit and shaft bottom pressure is obtained by the acquired parameters; and the capacity of the fissure-hole type oil deposit is predicted according to the relation between the capacity of the fissure-hole type oil deposit and the shaft bottom pressure.

Description

technical field [0001] The invention relates to the field of productivity prediction, in particular to a method and device for predicting the productivity of a fracture-pore type oil reservoir. Background technique [0002] Although the current productivity equations consider stress sensitivity, they are all for a single medium. Document 1: Tian Leng, Gu Yonghua, He Shunli, Calculation Model of Non-linear Seepage Productivity and Parameter Sensitivity Analysis of Low Permeability Reservoirs [J]. Hydrodynamics Research and Progress. 2011, 26 (1): 108-115. Considering the threshold pressure gradient, stress sensitivity, Newtonian fluid micro-compressibility and fluid viscosity variability, a non-linear planar radial stable seepage model for low-permeability reservoirs is established by using the seepage theory, and the model is solved by analytical methods. Document 2: Wang Yuying, Wang Xiaodong, Wang Yifei, He Ru, et al. Analysis of reasonable production pressure difference ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B49/08
Inventor 范子菲陈烨菲赵伦侯庆英傅礼兵许必锋李孔绸李云娟
Owner PETROCHINA CO LTD
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