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Method for Restoring Paleo-Occurrence of Strata in Basin

A stratigraphic and ancient production technology, applied in seismic signal processing, seismology for logging records, etc. Avoid work-heavy effects

Active Publication Date: 2020-05-15
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The invention provides a method for restoring the paleooccurrence of strata in the basin, which is used to solve the technical problems existing in the prior art such as limited scope of application, high technical difficulty, heavy workload, and inconsistent precision scales.

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  • Method for Restoring Paleo-Occurrence of Strata in Basin
  • Method for Restoring Paleo-Occurrence of Strata in Basin
  • Method for Restoring Paleo-Occurrence of Strata in Basin

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with accompanying drawing.

[0043] like figure 1 As shown, the present invention provides a method for recovering the paleo-occurrence of the basin interior with different acquisition parameters, the method comprising the following steps:

[0044] The first step is to collect drilling formation dip logging data, identify layers and beddings, and obtain formation dip logging data.

[0045] Specifically, the drilling data with formation dip logging data collected and sorted out in the study area were reviewed, and the comprehensive application software of integrated well logging interpretation was used to determine the occurrence of formations by means of correlation analysis and comparison, and to study the formation structure, fault location, Structural issues such as integration.

[0046] At this step, it is necessary to distinguish the bedding and bedding of the sandstone layer, and to avoid fract...

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Abstract

The invention relates to a method for restoring stratigraphic ancient attitudes in a basin and belongs to the geological basin analysis technical field. The invention aims to solve technical problemsof narrow application range, high technical difficulty, large workload and inconsistent precision scales in the prior art. The method of the invention is simple and practical and can be applied to well drilling under dipmeter logging. The method is based on a stratigraphic dipmeter logging principle, a stereographic projection principle and a layer flattening back-stripping method of paleostructure restoration. According to the method, the dip angle data of main stratigraphic geological interfaces (flag layer) of a single well or a plurality of wells are identified; the current dip direction and dip angle data of a target geological interface and a geological interface in a certain period are selected; with a plane rotation technique in the stereographic projection principle and the layerflattening method adopted, the stratigraphic ancient attitude characteristics of the target geological interface during the specific geological period are restored; and the stratigraphic ancient attitudes of the target geological interface during each geological period are sequentially restored according to a geochronologic sequence.

Description

technical field [0001] The invention relates to the technical field of geological basin analysis, in particular to a method for restoring the paleo-occurrence of strata inside a basin. Background technique [0002] Paleo-occurrence of stratigraphy refers to the spatial position of a designated geological boundary at one or some stages of development (eg, synsedimentary period or orogenic period) before the formation of the current structure, mainly including dip angle and dip. Paleostructural restoration in oil and gas-bearing basins is to restore the paleostructural form of a specific geological interface in the basin in the historical period. The study of paleostructural forms involves the analysis of changes in ancient occurrences such as the dip and dip of the geological interface in historical periods. Therefore, , the study of paleo-occurrence of strata also belongs to the category of paleo-structural restoration. The restoration of paleo-occurrence of strata has guid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/46G01V1/50
CPCG01V1/46G01V1/50
Inventor 刘士林张仲培张继标李建交
Owner CHINA PETROLEUM & CHEM CORP
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