CN-122018041-A - Inversion method, device, equipment and medium of sand body structure

CN122018041ACN 122018041 ACN122018041 ACN 122018041ACN-122018041-A

Abstract

The application discloses a sand body structure inversion method, a sand body structure inversion device, sand body structure inversion equipment and a sand body structure inversion medium. The method comprises the steps of obtaining a sand body structure type and a well logging curve series of at least one coring well at a target interval, determining at least one comprehensive index model corresponding to the sand body structure type according to the sand body structure type and the well logging curve series of each coring well, inverting the well logging curve of the non-coring well at the target interval according to the at least one comprehensive index model corresponding to the sand body structure type, and determining the sand body structure type of the non-coring well at the target interval. According to the technical scheme, inversion is carried out on the sand body internal structure of the river channel through the logging curve, so that the purpose of predicting longitudinal and plane spreading rules of the dominant reservoir with strong homogeneity is achieved, and the prediction precision of the sand body structure is improved.

Inventors

LI ZHIYONG
LIAO JIANBO
MA GUOFU
HAO BIN
LONG LIWEN
ZHAO LEYI
ZHANG JIANWU
Lei Fuping
CHENG GUANGJIN

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260512
Application Date: 20241111

Claims (10)

1. A method of inverting a sand structure, the method comprising: acquiring the sand body structure type and a logging curve series of at least one coring well at a target interval; determining at least one comprehensive index model corresponding to the sand body structure type according to the sand body structure type of each coring well and the logging curve series; And inverting the logging curve of the non-cored well at the target interval according to the at least one comprehensive index model corresponding to the sand structure type, and determining the sand structure type of the non-cored well at the target interval.
2. The method of claim 1, wherein determining at least one composite index model corresponding to a sand structure type from the sand structure type and the series of logs for each of the cored wells comprises: For each coring well, carrying out rock-electricity correction on the sand body structure type and the logging curve series of the coring well, and determining the corresponding relation between the sand body structure type and the logging curve series; based on the corresponding relation, carrying out correlation analysis on the sand body structure type of each coring well and a logging curve series, and determining the weight coefficient of each logging curve in the logging curve series; Determining characteristic parameters of each logging curve; and establishing a comprehensive index model corresponding to the sand body structure type according to the weight coefficient and the characteristic parameter of each logging curve.
3. The method of claim 2, wherein prior to rock electrical correction of the sand structure type and log series of the cored wells for each of the cored wells, the method further comprises: And carrying out standardization treatment on the log series to obtain a standard log series.
4. The method of claim 2, wherein determining characteristic parameters of each of the well logs comprises: For each log in the series of logs, determining an average magnitude value for each log, and determining a dentification rate for each log.
5. The method of claim 4, wherein determining the dentification rate of each of the log curves comprises: for each logging curve, determining the number of positive teeth, the positive tooth thickness ratio, the negative tooth number and the negative tooth thickness ratio of the logging curve in unit depth; And determining the dentition rate of the logging curve according to the positive tooth number, the positive tooth thickness ratio, the negative tooth number and the negative tooth thickness ratio.
6. The method of claim 1, wherein prior to acquiring the sand structure type and log series of the at least one cored well at the interval of interest, the method further comprises: and carrying out small layer division comparison on the coring well according to the marking layer and the gyratory characteristic of the coring well, and determining an interval with the preset thickness within 50 meters as a target interval.
7. An inversion apparatus for sand structures, the apparatus comprising: the parameter acquisition module is used for acquiring the sand body structure type of at least one coring well at a target interval and a logging curve series; The model building module is used for determining at least one comprehensive index model corresponding to the sand body structure type according to the sand body structure type of each coring well and the logging curve series; And the structure inversion module is used for inverting the logging curve of the non-cored well at the target interval according to the at least one comprehensive index model corresponding to the sand structure type, and determining the sand structure type of the non-cored well at the target interval.
8. An electronic device, the device comprising: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of inverting a sand structure of any one of claims 1-6.
9. A computer readable storage medium storing computer instructions for causing a processor to perform the method of inverting a sand structure according to any one of claims 1-6.
10. A computer program product, characterized in that it comprises a computer program which, when executed by a processor, implements a method of inverting a sand structure according to any one of claims 1-6.

Description

Inversion method, device, equipment and medium of sand body structure Technical Field The application relates to the technical field of oil and gas exploration, in particular to a sand body structure inversion method, device, equipment and medium. Background In lithologic oil reservoirs, the sand body of the oil and gas reservoir refers to the sand body containing oil in an underground reservoir, consists of a plurality of irregular sand bodies, and is the minimum oil-containing unit of the underground oil layer and the most basic unit for controlling the movement of oil and water. Under different deposition environment conditions, the difference of the sand structures of the reservoir is larger, the difference of the sand structures of the reservoir is well distinguished, and the method plays an important role in comprehensive evaluation and development research of the oil and gas reservoir. Currently, in the field of oil and gas exploration, a drilling and coring method is generally adopted to determine a sand body structure, and a coring section is utilized to observe the change characteristics of the sand body structure so as to determine a corresponding sand body structure. However, most wells, especially development wells, have no coring section for the cost of coring, which has a significant impact on the characterization of the sand structure in this area. Therefore, how to provide a technical scheme capable of accurately predicting the sand structure is a technical problem to be solved by those skilled in the art. Disclosure of Invention The application provides an inversion method, device, equipment and medium of a sand body structure, which are used for inverting the river channel sand body structure through a logging curve so as to achieve the purpose of predicting longitudinal and plane spreading rules of an advantage reservoir with strong homogeneity and improve the prediction precision of the sand body structure. According to an aspect of the present application, there is provided a method of inverting a sand structure, the method comprising: acquiring the sand body structure type and a logging curve series of at least one coring well at a target interval; determining at least one comprehensive index model corresponding to the sand body structure type according to the sand body structure type of each coring well and the logging curve series; And inverting the logging curve of the non-cored well at the target interval according to the at least one comprehensive index model corresponding to the sand structure type, and determining the sand structure type of the non-cored well at the target interval. According to another aspect of the present application, there is provided an inversion apparatus for a sand body structure, the apparatus comprising: the parameter acquisition module is used for acquiring the sand body structure type of at least one coring well at a target interval and a logging curve series; The model building module is used for determining at least one comprehensive index model corresponding to the sand body structure type according to the sand body structure type of each coring well and the logging curve series; And the structure inversion module is used for inverting the logging curve of the non-cored well at the target interval according to the at least one comprehensive index model corresponding to the sand structure type, and determining the sand structure type of the non-cored well at the target interval. According to another aspect of the present application there is provided apparatus for inverting a sand structure, the apparatus comprising: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of inverting a sand structure according to any one of the embodiments of the present application. According to another aspect of the present application, there is provided a computer readable storage medium storing computer instructions for causing a processor to perform the method of inverting a sand structure according to any of the embodiments of the present application. According to another aspect of the application, there is provided a computer program product comprising a computer program which, when executed by a processor, implements a method of inverting a sand structure according to any of the embodiments of the application. The technical scheme includes that the sand body structure type and the well logging curve series of at least one coring well at a target interval are obtained, at least one comprehensive index model corresponding to the sand body structure type is determined according to the sand body structure type and the well logging curve series of each coring well, inversion is carried out on the well logging curve of a non-coring well at the target interval according to the at leas