A Fracture Classification Prediction Method Based on Seismic Frequency Division Technology

A prediction method and technology, applied in the field of petroleum exploration and development, can solve problems such as weakening the fault level, and achieve the effect of simplifying complex problems, eliminating multi-solution problems, and improving the efficiency of fault interpretation.

Active Publication Date: 2022-03-01
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

That is to say, for faults with different geological scales, a certain optimized prediction method is uniformly used, ignoring the different responses of seismic data to different orders of faults under different frequency conditions, and the responses of different algorithms to different orders of faults. There are also differences, and it is biased to weaken the research on the fracture level

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  • A Fracture Classification Prediction Method Based on Seismic Frequency Division Technology
  • A Fracture Classification Prediction Method Based on Seismic Frequency Division Technology
  • A Fracture Classification Prediction Method Based on Seismic Frequency Division Technology

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[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0041] like figure 1 As shown, a fracture classification prediction method based on seismic frequency division technology includes the following steps:

[0042] S1. Basic data collection: collect data in the study area, including: regional survey data, post-stack migration seismic bodies, conventional logging curves, drilling and logging data, well deviation data, coring data, layered data, seismic interpretation Horizontal and single well test productivity data;

[0043] S2. Use the acoustic wave and density logging curves to make single well synthetic records, and calibrate the top and bottom interfaces of the target layer and the layers above and below the target layer;

[0044] S3. Spectrum analysis of the original superimposed amplitude data of t...

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Abstract

The invention discloses a fracture classification prediction method based on seismic frequency division technology, which includes: basic data collection; single well synthetic record making, calibration and research target layer; frequency spectrum analysis of the original post-stack amplitude data of the target layer, and clear effective signal of the target layer data Scope; clarify the approximate scale of fault development in the target horizon; establish a forward modeling model for simulation; simulate the frequency division processing of the simulation results, and optimize the response frequency of different levels of faults; perform targeted frequency division processing on the original amplitude data; analysis and algorithm of fracture attributes at all levels Optimizing; all levels of fault profile and three-dimensional spatial prediction effect analysis; all levels of fault fusion into a map, the actual drilling data match analysis; fault detection abnormal areas are eliminated, and the fault classification prediction is completed. The invention has low requirements on data processing conditions, small amount of computation, and fast processing speed; eliminates a large number of multi-solution problems in fracture interpretation, simplifies complex problems, improves fracture interpretation efficiency, reduces seismic interpretation workload, and increases fracture prediction accuracy.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration and development, in particular to a fracture classification prediction method based on seismic frequency division technology. Background technique [0002] Currently popular fracture (fracture) prediction methods at home and abroad mainly cover three types of identification and prediction methods: geology, well logging and seismic. Cores, well logs and other data are used to identify and predict small-scale fractures with a certain distribution range, but the prediction range is limited. [0003] Due to factors such as regional tectonic events and fault development stages and strengths, faults in the study area are generally divided into main (large-scale) faults, secondary (meso-scale) faults, and micro (small-scale) faults (cracks). , and its prominent performance is that the off-distances are of different sizes and forms. With the rapid development of 3D seismic technology, seis...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30G01V1/28
CPCG01V1/306G01V1/282G01V2210/642
Inventor 谭磊刘宏谭秀成于童杨应伍亚王宇峰
Owner SOUTHWEST PETROLEUM UNIV
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