Method and device for calculating fracture porosity of tight reservoirs using double lateral curves

A technology of fracture porosity and tight reservoir, applied in the field of oil and gas field exploration and development, can solve the problems of slow calculation speed and can not be applied well, achieve accurate calculation, eliminate dual lateral gas logging response, and low implementation cost Effect

Active Publication Date: 2022-08-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

This method has achieved good results, but its calculation speed is slow and cannot be well applied to actual data processing

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  • Method and device for calculating fracture porosity of tight reservoirs using double lateral curves
  • Method and device for calculating fracture porosity of tight reservoirs using double lateral curves
  • Method and device for calculating fracture porosity of tight reservoirs using double lateral curves

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[0051] Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of this application to those skilled in the art.

[0052] As mentioned in the background art, when calculating the porosity according to the existing empirical formula, the problem that the porosity is too large often occurs. After in-depth research, the inventor divided the fractured reservoir into a fractured gas layer and a fractured dry layer, and calibrated the logging responses of the two. The calibration results show that the dual lateral logging responses of the fractured gas lay...

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Abstract

The present application discloses methods and methods for calculating fracture porosity in tight reservoirs using dual lateral curves. The method includes: determining a target reservoir as a fractured gas layer; calculating a dual lateral response correction parameter Δg for the fractured gas layer according to a calculation formula; correcting the deep lateral logging value of the fractured gas layer according to the correction formula, The corrected deep lateral logging value is obtained, and the corrected deep lateral logging value is used to calculate the porosity of the target reservoir. The technical solution proposed in this application proposes a method to eliminate the response of the dual lateral gas log by using the calibration study of the fracture and reservoir gas-bearing log curves for tight reservoirs, so as to achieve accurate calculation of tight reservoirs. The purpose of layer double lateral fracture porosity has strong theoretical basis and low implementation cost, which provides a reliable basis for tight reservoir evaluation and production test layer selection.

Description

technical field [0001] The invention relates to the field of oil and gas field exploration and development, and more particularly, to a method for calculating the fracture porosity of tight reservoirs using double lateral curves and a device for calculating the fracture porosity of tight reservoirs using double lateral curves. Background technique [0002] Fractured reservoirs are an extremely important concealed oil and gas reservoir. Due to their severe heterogeneity and the complexity of fracture distribution, logging evaluation of such reservoirs is difficult. Dual lateral logging is considered to be one of the most effective logging methods for identifying and evaluating reservoir fractures in conventional logging. [0003] Fracture porosity is a key parameter for evaluating fractured reservoirs. FMI imaging logging is more accurate in evaluating fracture porosity, but its cost is high and its application is limited. Conventional logging data is economical, practical ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/40G01V1/30
CPCG01V1/40G01V1/306G01V2210/6244
Inventor 李浩魏修平
Owner CHINA PETROLEUM & CHEM CORP
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