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A method for highlighting small-scale fracture-vug information under strong seismic reflection interface

A seismic reflection, small-scale technology, applied in seismic signal processing, seismology for logging records, etc., can solve the problems of huge data calculation, high complexity of seismic data, huge data volume, etc., to improve the success rate of drilling , Improve reservoir prediction accuracy and weaken the effect of masking

Active Publication Date: 2021-09-24
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0006] However, due to the complexity of the geological environment, the complexity of seismic data is usually very high, and the data volume is extremely large
Using the existing technology to eliminate interference from strong reflection interfaces not only requires extremely large and complicated data calculations, but also the final interpretation results cannot meet the requirements in terms of accuracy and stability

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  • A method for highlighting small-scale fracture-vug information under strong seismic reflection interface
  • A method for highlighting small-scale fracture-vug information under strong seismic reflection interface
  • A method for highlighting small-scale fracture-vug information under strong seismic reflection interface

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[0030] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so that implementers of the present invention can fully understand how the present invention uses technical means to solve technical problems, and achieve the realization process of technical effects and according to the above-mentioned realization process The present invention is implemented concretely. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0031] In the field of geological exploration, carbonate marine facies is a relatively common geological structure for oil and gas reservoirs. In many practical scenarios, Ordovician carbonatite reservoirs are dominated by fractures and caves, and are controlled by multipl...

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Abstract

The invention discloses a method for highlighting small-scale fracture-cavity information under a strong seismic reflection interface. In the method of the present invention, for the seismic data containing strong reflection interface interference, under the condition of ensuring the stability of the wavelet, the seismic data volume highlighting the small-scale fracture-cavity information is generated by reconstructing the reflection coefficient. According to the method of the present invention, the masking of reservoir seismic information by the strong reflection interface can be effectively weakened, and the seismic response characteristics of the reservoir can be highlighted, thereby improving reservoir prediction accuracy and drilling success rate, and providing powerful data support for guiding drilling deployment.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a method for highlighting small-scale fracture-cavity information under a strong seismic reflection interface. Background technique [0002] In the field of geological exploration, carbonate marine facies is a relatively common geological structure for oil and gas reservoirs. In many practical scenarios, Ordovician carbonatite reservoirs are dominated by fractures and caves, and are controlled by multiple origins such as faults, sequence boundaries, and hydrothermal fluids, forming a mixture of superimposed transformations of multiple origins dominated by faults. type reservoir. The characteristics of the reservoir on the seismic section are not obvious, because the top surface of the reservoir is a strong reflection interface, and the weak seismic response characteristics of the reservoir are buried in the event axis of the strong reflection red trough, which brings great ...

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Application Information

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IPC IPC(8): G01V1/50
CPCG01V1/50
Inventor 李宗杰李海英文山师杨子川韩勇石媛媛洪才均李弘艳吴鲜张荣
Owner CHINA PETROLEUM & CHEM CORP
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