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A Fault Interpretation Method on the Top of Granite Buried Hill

A fault interpretation and granite technology, applied in seismic signal processing and other directions, can solve the problems of high interpretation experience, time-consuming, small apparent fault distance, etc., to achieve the effect of improving interpretation accuracy, improving recognition ability, and reducing workload

Active Publication Date: 2017-09-15
CHINA NAT OFFSHORE OIL CORP +1
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  • Claims
  • Application Information

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Problems solved by technology

However, some granite buried hills have flat terrain, uniform lithology, small apparent fault distances on both sides of the fault, indistinct reflection features on the cross section, and unclear wave group characteristics. In addition, the resolution of seismic data is limited. and requires a high level of experience in interpreting

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  • A Fault Interpretation Method on the Top of Granite Buried Hill
  • A Fault Interpretation Method on the Top of Granite Buried Hill
  • A Fault Interpretation Method on the Top of Granite Buried Hill

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] A method for interpreting faults on top of granite buried hills provided by the present invention comprises the following steps:

[0018] 1) Raw seismic data preprocessing

[0019] Because the original seismic data still contains some random noises that have not been completely suppressed, the sex-to-noise ratio of seismic data can be improved through interpretive processing.

[0020] Such as figure 1 As shown, the present invention calculates the original seismic data through seismic professional commercial software (such as LandMark or GeoFrame software) to generate the minimum similar data volume, and uses the minimum similar data volume as the criterion to control the fault enhancement filtering process:

[0021] In the seismic professional commercial software, a threshold is set according to the continuity of the seismic axis. If the sma...

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Abstract

The invention relates to a fault interpretation method on the top of a granite buried hill, which comprises the following steps: 1) preprocessing of original seismic data; 2) preliminary interpretation of faults; 3) automatic tracking of horizons; 4) selection of sensitive seismic attributes; 5) completion of faults explain. Because the present invention adopts real-time dynamic interpretation of sensitive seismic attributes and seismic sections, the workload of fault interpretation is reduced and the interpretation accuracy is improved; since the present invention extracts sensitive attributes after automatic tracking of buried hill top layers, it better reflects potential Subtle changes in the structure of the top of the mountain improve the ability to identify faults; the present invention completes the interpretation of faults with small apparent fault distances and inconspicuous cross-section reflection features through the study of the current structure and geomorphology of the target oilfield, which is fast and convenient; Strong operability greatly reduces the dependence of research results on explanatory experience. The invention can be widely used in fault interpretation work of granite buried hill reservoirs.

Description

technical field [0001] The invention relates to a complex structural fault interpretation method, in particular to a granite buried hill top fault interpretation method. Background technique [0002] Fault interpretation is one of the most important tasks in oil and gas reservoir research, and the reasonability of fault interpretation results directly affects the success or failure of oil and gas discovery, and the accuracy of fault interpretation also affects the effectiveness of oilfield development. The interpretation of faults is mainly based on the principle of "combination of horizontal sections". At the same time as section interpretation, it is supplemented by attribute slice analysis to better grasp the spatial distribution characteristics of the fault system and ensure the rationality of the fault geometry. . [0003] The buried hill has experienced multiple periods of tectonic movement, and the faults are relatively developed, and the plane combination relationsh...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 范廷恩宋来明胡光义周建楠聂妍蔡文涛田楠樊鹏军井涌泉
Owner CHINA NAT OFFSHORE OIL CORP