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Method and device for quantitatively distinguishing massive sandstone in the main body of facies-controlled sand body structure

A technology of sand body structure and sandstone, applied in the field of quantitative identification of massive sandstone in the main body of facies-controlled sand body structure

Active Publication Date: 2020-04-10
PETROCHINA CO LTD
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Problems solved by technology

However, there is currently no method for quantitatively distinguishing the main massive sandstone of the facies-controlled sand body structure, which can quantitatively distinguish the main massive sandstone from the flank bedding sandstone, and accurately identify the main massive sandstone

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  • Method and device for quantitatively distinguishing massive sandstone in the main body of facies-controlled sand body structure
  • Method and device for quantitatively distinguishing massive sandstone in the main body of facies-controlled sand body structure
  • Method and device for quantitatively distinguishing massive sandstone in the main body of facies-controlled sand body structure

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[0050] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application.

[0052] It should be noted that when an element is referred to as being “d...

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Abstract

The invention discloses a method and a device for quantitatively distinguishing massive sandstones of the main body of a phase control sand body structure. The method comprises: dividing small layersand taking the comprehensive logging interpretation result as the object of the sand body structure research; performing linear correlation analysis on specified parameters and shale content, selecting top N items with better correlation as the basis of the comprehensive index method, and obtaining the threshold value of the specified parameters according to different log series values and core measured data corresponding to massive sandstones and bedding sandstones; determining a weight coefficient corresponding to each specified parameter; performing data standardization processing on top Nspecified parameters, and calculating the comprehensive index for the parameters after the data standardization processing, in which a weight based on the shale content is used as a coefficient and the directly / inversely proportional relationship of electrical characteristic of the massive sandstones is used as a basis; calculating the smoothness of the comprehensive index through a variance formula and a variation formula. According to the method and the device for quantitatively distinguishing the massive sandstones of the main body of the phase control sand body structure, the massive sandstones can be accurately identified to guide the fine exploration and development of lithological oil-gas reservoir.

Description

technical field [0001] The invention relates to the technical field of lithological reservoir identification, in particular to a method and a device for quantitatively distinguishing massive sandstone of a main body of a facies-controlled sand body structure. Background technique [0002] A large number of thin interbedded reservoirs are often developed inside the strata, with thin single-stage thickness and poor physical properties. However, within a single stratigraphic age, the cumulative thickness of thin interbedded reservoirs is relatively large, and often occupies the main position of the thickness of the sand body on the planar sand body thickness map, which is easy to mislead the overall understanding of the sand body. In addition, some high-quality reservoirs with relatively large single-stage thickness but small cumulative thickness are located at the edge of the sand body thickness plan due to their thin thickness in a certain layer, which is easily overlooked by...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 姚泾利廖建波李智勇余平辉郑希民邸俊张晓磊杨军侠
Owner PETROCHINA CO LTD
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