Genetic Mechanism of Lower-Order Faults in Shale Formations in Rift Basins

The distribution of lower-order faults affects the development of oil and gas and the distribution of remaining oil, which is also the key to the development of fault block reservoirs in eastern China. The lower-order faults are characterized by short extension, small fault displacement, and difficu...

Full description

Saved in:
Bibliographic Details
Published in:Geofluids 2023-04, Vol.2023, p.1-9
Main Authors: Yang, Haimeng, Wu, Xuepeng, Liu, Jingshou, Hu, Caifu
Format: Article
Language:English
Subjects:
Analysis
Basins
Distribution
Dredging
Excavation
Fault detection
Fault lines
Faults
Geological faults
Geology
Oil
Oil fields
Oil recovery
Petroleum mining
Reservoirs
Rock mechanics
Sedimentary rocks
Sedimentation & deposition
Shale
Shear stress
Simulation
Stratigraphy
Structural analysis
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The distribution of lower-order faults affects the development of oil and gas and the distribution of remaining oil, which is also the key to the development of fault block reservoirs in eastern China. The lower-order faults are characterized by short extension, small fault displacement, and difficult identification by traditional seismic interpretation methods. Therefore, it is necessary to predict the development law of faults in combination with the paleostress field during the fault formation period to improve the accuracy of fault seismic interpretation. In this paper, on the basis of reservoir structural analysis and rock mechanics experiments, the geological and mechanical model of the Sanduo period is established to predict the simulation of the paleostress field during the development of lower-order faults. The development of lower-order faults in rift basins is mainly controlled by the minimum principal stress and stress difference, and the shear stress in the profile controls the tendency of faults. Controlled by the paleostress field, the occurrence of lower-order faults in the Weizhuang area, Gaoyou Sag, and Subei Basin is very complex, and the strike of the fault is distributed as a tension shear broom on the plane. The prediction results can provide a reference for the excavation of remaining oil and the development of oil and gas.
ISSN:1468-8115
1468-8123
DOI:10.1155/2023/3908460