Method and device for calculating tight reservoir fracture porosity by utilizing dual lateral curve

A technology for fractured porosity and tight reservoirs, applied in the field of oil and gas exploration and development, can solve problems such as poor application and slow calculation speed, and achieves elimination of dual lateral gas logging response, accurate calculation, and low implementation cost. Effect

Active Publication Date: 2020-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Application Information

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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 tight reservoir fracture porosity by utilizing dual lateral curve
  • Method and device for calculating tight reservoir fracture porosity by utilizing dual lateral curve
  • Method and device for calculating tight reservoir fracture porosity by utilizing dual lateral curve

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Embodiment Construction

[0051] Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although 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 to 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 the porosity is calculated according to the existing empirical formula, the problem of too large porosity 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 laterolog responses of fractured gas layers and fractu...

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Abstract

The invention discloses a method and device for calculating tight reservoir fracture porosity by utilizing a dual lateral curve. The method comprises the following steps that a target reservoir is determined to be as a fracture type gas reservoir; a dual lateral response correction parameter delta g for the fracture type gas reservoir is calculated according to a calculation formula; and accordingto the correction formula, a deep lateral logging value of the fracture type gas reservoir is corrected to obtain a corrected deep lateral logging value R <r><*>, and the porosity of the target reservoir is calculated by adopting the corrected deep lateral logging value R <r><*>. According to the technical scheme, aiming at the tight reservoir, by utilizing the calibration research of a fractureand reservoir gas in the dual lateral logging curve, a method for eliminating the dual lateral gas bearing logging response is provided, the purpose of accurately calculating the tight reservoir duallateral fracture porosity is achieved, the theoretical basis is strong, the implementation cost is low, and a reliable basis is provided for tight reservoir evaluation and production test layer optimization.

Description

technical field [0001] The invention relates to the field of exploration and development of oil and gas fields, and more specifically, relates to a method for calculating the porosity of tight reservoir fractures by using double lateral curves and a device for calculating the porosity of tight reservoir fractures by using double lateral curves. Background technique [0002] Fractured reservoirs are an extremely important subtle type of reservoirs. Due to their serious heterogeneity and complex distribution of fractures, the logging evaluation of this kind of reservoirs is difficult. Dual laterolog 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 well logging data are eco...

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Application Information

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Patent Type & Authority Applications(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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