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Restoration method of ancient landform of syngenic normal fault development area

A restoration method and technology of normal faults, which are applied in the directions of geophysical measurement and instruments to achieve the effect of reasonable landform and eliminating landform illusion.

Inactive Publication Date: 2018-07-10
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Other paleogeomorphological restoration methods have the same problem, so I won’t repeat the explanation

Method used

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  • Restoration method of ancient landform of syngenic normal fault development area
  • Restoration method of ancient landform of syngenic normal fault development area
  • Restoration method of ancient landform of syngenic normal fault development area

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Embodiment 1

[0041] Taking the formation of the second member of the Shahejie Formation in a complex fault block of an oilfield in a rift basin in eastern China as an example, the fault block area is a low-order sequence syngenetic normal fault development area of ​​the second member of the Shahejie Formation. In this area, the paleogeomorphology restoration work in the area where syngenetic faults are developed is carried out by using the method described in the present invention.

[0042] First, carry out research on fault activity in the study area, combine well logging and 3D seismic data, and use the high-resolution sequence stratigraphic framework as a guide. Make multiple well cross sections according to the following formula

[0043] Growth index EI = stratum thickness H2 on the descending wall / stratum thickness H1 on the ascending wall

[0044]The growth index EI of different sections of syngenetic normal faults in a certain sequence within the Shahejie Formation was calculated, ...

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Abstract

The invention relates to the field of ancient landform restoration, and discloses a restoration method of an ancient landform of a syngenic normal fault development area inside a complicated fault block. According to the method, a growth index of the syngenic normal fault is calculated, in a control range of a downthrown side of the syngenic normal fault, the thickness of the downthrown side is corrected by comparing the thickness of the downthrown side and the growth index, so that the false ancient landform caused by the thickening of the downthrown side stratum due to the gradual deformation activity of the syngenic normal fault when the ancient landform is restored can be eliminated, and the ancient landform is more reasonable.

Description

technical field [0001] The invention relates to the field of paleogeomorphology restoration, in particular to a method for restoring paleogeomorphology in a syngeneic normal fault development area. Background technique [0002] Paleogeomorphology research is an important part of the coupling analysis of structure and sedimentation. In continental rift basins, paleogeomorphology affects the change of accommodation space in the basin, which in turn controls the dispersion process of sediments and the distribution pattern of sand bodies. Therefore, the restoration of paleogeomorphology can help determine the distribution of underground reservoirs, which has important guiding significance for oil and gas exploration and development. [0003] At present, there are many restoration methods of paleogeomorphology, such as residual thickness method ("Pre-Jurassic Paleogeomorphology Restoration and Oil and Gas Enrichment Law in Zhoujiawan Area", Guo Shaobin et al., "Earth Science", N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 窦鲁星侯加根刘钰铭宋随宏廖爽王建武刚
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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