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Basin ancient landform recovery method

A restoration method and technology of paleogeomorphology, applied in seismology, geophysical measurement, seismic signal processing, etc., to achieve the effect of important economic value

Active Publication Date: 2020-10-13
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to overcome the existing defects, provide a method for restoring basin paleogeomorphology, solve the error in estimation of paleogeomorphology due to stratum thickness changes caused by differential compaction, and solve the problem of sedimentary facies and paleowater depth. The influence of lateral changes on the selection of leveling horizons and the restoration of paleogeomorphology, and the restoration of paleogeomorphology more accurately

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Embodiment

[0050] This embodiment provides a method for restoring basin paleogeomorphology, comprising the following steps:

[0051] S1: Establish an isochronous sequence stratigraphic framework through comprehensive analysis of logging and seismic data;

[0052] Determine the important unconformity interface and sequence interface of the basin. The sequence interface mainly includes two types of physical interfaces, one is the denudation surface or water regression interface formed when the sedimentary base level falls, and the other is formed when the sedimentary base level rises Water entry interface, such as land denudation unconformity surface, sedimentary discontinuity, exposed surface, retreating unconformity surface at the top of forced water regression sedimentation and underwater denudation surface at the bottom, etc.; the other type is formed when the sedimentary base level rises Water entry interface, such as sea / lake flooding surface, maximum sea flooding surface in high-lev...

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Abstract

The invention discloses a basin ancient landform recovery method. The method comprises the following steps of establishing an isochronous sequence stratigraphic framework by comprehensively analyzinglogging and seismic data; carrying out de-compaction calculation on a stratum thickness; and selecting an appropriate paleo-sedimentary horizontal plane from current stratum records to be leveled to restore an ancient landform. According to the basin ancient landform recovery method, an ancient landform change can be determined more accurately, and the basin ancient landform recovery method is ofgreat significance to basin structure ancient landform recovery; and accurate ancient landform recovery is beneficial to prediction of distribution of sedimentary sand bodies and stratum traps, and the method has an important economic value in an oil and gas exploration process.

Description

technical field [0001] The invention relates to the technical field of restoring basin paleo-geomorphology, in particular to a method for restoring basin paleo-geomorphology. Background technique [0002] Restoration of paleogeomorphology is an important content of sedimentary basin analysis. Paleogeomorphology maps can directly reflect the geomorphic environment during deposition (distribution of valleys, range of denuded areas, deposition centers, slope breaks, etc.), and provide information for the prediction of reservoir sand bodies. theoretical basis. Mapping the paleogeomorphology of different depositional periods can reflect the evolution of paleogeomorphology and indirectly reflect the changes of depositional environment, including tectonic movement, lake level rise and fall, denudation area, spatial distribution and configuration of sedimentary area, etc. [0003] At present, the restoration of paleogeomorphology is mainly based on: stratum thickness, such as impre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30G01V1/36G01V1/34
CPCG01V1/302G01V1/306G01V1/36G01V1/345G01V2210/6161G01V2210/6124G01V2210/6244G01V2210/624G01V2210/74
Inventor 林畅松刘景彦李浩
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)