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Comprehensive modeling method of complicated mountain front tectonic zone and established geologic structure model

A technology of geological structure and modeling method, applied in geophysical measurement, instruments, etc., can solve the problems of application limitation of seismic data seismic interpretation technology, inability to use drilling data, difficulty in demonstrating and deploying exploratory wells, etc., to avoid subjectivity, modeling The method is practical and the effect of improving the success rate of exploration

Inactive Publication Date: 2014-07-30
中国石油化工股份有限公司胜利油田分公司勘探开发研究院西部分院
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Problems solved by technology

However, in the southern and western piedmont structural belts, due to the complex surface, complex structure, and strong anisotropy of the shallow surface, seismic exploration encounters severe challenges, and the quality of seismic data limits the application of various seismic interpretation techniques
On the other hand, due to the complex structure, it is difficult to demonstrate the deployment of exploratory wells, so it is impossible to use more drilling data to assist modeling

Method used

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  • Comprehensive modeling method of complicated mountain front tectonic zone and established geologic structure model
  • Comprehensive modeling method of complicated mountain front tectonic zone and established geologic structure model
  • Comprehensive modeling method of complicated mountain front tectonic zone and established geologic structure model

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Embodiment 1

[0043] Embodiment one: the present invention uses figure 1 Taking the Hasan piedmont structural belt on the northern margin of the Junggar Basin as an example, a comprehensive modeling method for the complex piedmont structural belt is provided, including the following steps:

[0044] (1) Use the electrical method or gravity profile to identify large fractures in the profile;

[0045] (2) Perform section interpretation on 2D or 3D seismic data, identify and characterize faults (see figure 2 );

[0046] (3) Using the seismic velocity spectrum data to determine the position of the fault breakpoint and describe the fault;

[0047] (4) Use fault fold theory to identify and describe faults in complex structural parts, especially in areas with poor seismic data (see figure 2 );

[0048] (5) Carry out coherent attribute volume calculations on seismic data, and use coherent attribute data volumes to interpret faults;

[0049] (6) Calibrate the seismic section according to the d...

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Abstract

The invention discloses a comprehensive modeling method of a complicated mountain front tectonic zone and an established geologic structure model. The comprehensive modeling method comprises the following steps of recognizing and depicting rupture, explaining the rupture, checking the cutting relation and rationality of the rupture, driving a tectonic system according to major rupture, confirming stratum filling, preliminarily establishing the model and performing continuous adjustment and modification through forward earthquake modeling and forward gravity modeling to obtain the reasonable model. The comprehensive modeling method utilizes a field outcrop, gravity, a magnetic method, an electrical method, an earthquake, well drilling and other information to perform modeling and obtain a reasonable and correct subsurface structure and strata distribution, oil-gas exploration is performed with the information as a guidance, various information is organically integrated, one-sidedness of single information modeling is reduced, and a formed modeling technology effectively avoids the modeling subjectivity of different persons. Therefore, establishment of the geologic structure model of the complicated mountain front tectonic zone is facilitated, an oil-gas accumulation position is confirmed, the exploration risk is reduced, and the exploration success rate is improved.

Description

technical field [0001] The invention belongs to the technical field of geological modeling for oil and gas exploration and development, and in particular relates to a comprehensive modeling method for complex piedmont structural belts and an established geological structure model. Background technique [0002] The piedmont structural belt is a complex structural development area adjacent to the piedmont formed by collisional orogeny, where anticlines and thrust blocks are developed in rows and belts, which have good trap conditions and are capable of forming large and extra-large oil and gas It is the key field for domestic and foreign oil and gas breakthroughs. [0003] Although the piedmont structural belt is currently one of the most oil-gas-rich regions in the world, it is difficult to establish a reasonable geological model due to the transformation and superposition of multiple tectonic movements and strong structural deformation. At present, the modeling method of th...

Claims

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Application Information

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IPC IPC(8): G01V11/00
Inventor 张奎华于洪洲程世伟吕铁良陈平
Owner 中国石油化工股份有限公司胜利油田分公司勘探开发研究院西部分院
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