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Strike-slip fault structure evolution analytical method

A technology of strike-slip faults and analytical methods, applied in the field of structural evolution analysis of strike-slip faults, can solve problems such as lack of

Inactive Publication Date: 2018-10-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Many scholars have made special discussions on the identification marks of strike-slip faults, combination patterns, and their relationship with oil and gas, but there is still a lack of more accurate methods for estimating the translational distance of strike-slip faults in oil-province structures.

Method used

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specific Embodiment approach

[0065] The patent of the present invention takes the Subei Basin-West of Dongtai Depression-Jinhu Sag's TC fault as an example to illustrate the specific implementation project of the present invention. In recent years, with the deepening of oil and gas exploration, clarifying the development process of TC faults and serving oil and gas exploration has become an issue that explorers pay more and more attention to. It is more effective and The more convincing evidence of strike-slip followed by strike-slip intensity can further clarify the strike-slip characteristics of TC faults and further serve oil and gas exploration.

[0066] The Jinhu sag starts from the Zhangbaling uplift in the west, closes to Lingtangqiao and Liubao low uplifts in the east, adjoins the Jianhu uplift in the northwest, and develops the Tianchang uplift in the south ( image 3 ). From the depositional period of the Funing Formation, the study area gradually formed a dustpan-shaped structural pattern with...

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Abstract

The invention belongs to the oil and gas field exploration and development and mineral evaluation and prediction field and relates to a strike-slip fault structure evolution analytical method. According to the strike-slip fault structure evolution analytical method, the fault paleo fall of different positions of a strike-slip fault is calculated, so that the periodic rhythm change of the paleo fall of the fault along a strike-slip direction is analyzed; restored graben-horst structures at two sides of the strike-slip fault in different periods are used to determine basin prototypes at the twosides of the strike-slip fault before the deposition of different strata, and identify the damping sections of the strike-slip fault; the unit movement intensity of the fault is calculated to characterize the strike-slip amount of the strike-slip fault; the calculated strain energy release rate of the strike-slip fault is used to analyze the dynamic mechanisms of different portions of the strike-slip fault; and the numerical simulation of a tectonic stress field is used to explain the fault from the aspect of dynamics and verify the formation mechanism of the strike-slip fault. The method foranalyzing the formation mechanism and evolution process of the strike-slip fault is systematically provided from a time and space four-dimensional perspective in the aspects of geometry, kinematics and dynamics.

Description

technical field [0001] The invention relates to the fields of oil and gas field exploration and development, and mineral evaluation and prediction, in particular to a method for analyzing the structural evolution of strike-slip faults. Background technique [0002] The strike-slip structure is a twisting structure closely related to the structural evolution of the basin and the enrichment of oil and gas. In oil and gas exploration, strike-slip faults have their unique identification marks and important petroleum geological significance. Steep cross-sections, flower-like structures, rich cross-sectional traces, common dolphin effect and ribbon effect, sudden changes in formation thickness on both sides of the fault are the main signs for identifying strike-slip faults. Affected by the complex stress field, strike-slip faults and between strike-slip faults and their associated structures often exhibit specific combination patterns, such as zigzag structure, echelon type and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/301
Inventor 刘敬寿
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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