Calibration method for improving seismic interpretation precision of fault terrace structures

A technology of seismic interpretation and calibration method, applied in the fields of seismology, seismic signal processing, geophysical measurement, etc., can solve the problems of large calibration error and low accuracy of seismic tectonic interpretation, and achieves the goal of improving the corresponding accuracy and the interpretation accuracy. Effect

Active Publication Date: 2017-04-19
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a calibration method for improving the accuracy of seismic interpretation of fault-step structures, which overcomes the problem in the prior art that wells in different fault-steps use th

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  • Calibration method for improving seismic interpretation precision of fault terrace structures
  • Calibration method for improving seismic interpretation precision of fault terrace structures
  • Calibration method for improving seismic interpretation precision of fault terrace structures

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Embodiment Construction

[0025] In the following, the time-depth conversion method of the present invention will be further described by taking the fine earthquake interpretation in the Qingzu area of ​​the Dongpu Sag as an example in conjunction with the accompanying drawings.

[0026] 1. Use the seismic data of the target area to divide the fault steps in the fault step structure, make the well synthetic records of the selected single wells in each fault step, and establish the well synthetic records of the selected single wells in each fault step and their side channel seismic phase corresponding relationship.

[0027] 1.1. Based on the electrical density or acoustic data of the selected single wells in each fault step, use the seismic interpretation software to make well synthetic records of the selected single wells in each fault step.

[0028] According to the seismic data in the Qingzu area, two large faults developed in Qingzu, namely the Shijiaji fault and the Changyuan fault. These two fault...

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Abstract

The invention relates to a calibration method for improving the seismic interpretation precision of fault terrace structures, and belongs to the field of oil and gas rolling development. Single wells in fault terrace structures are selected for well synthesis recording. The seismic time-depth relationship in each of the fault terraces where the selected single wells are located is determined. The corresponding relationship between the drilled formations of all the wells in each fault terrace and earthquake is established based on the time-depth relationship between the drilled formation of the selected well in the fault terrace and the seismic phase of the corresponding fault terrace. For drilling of single wells in different fault terraces, the discordogenic fault depth of a fault terrace in which a single well is drilled is used as a boundary, corresponding time-depth relationship data is extracted and spliced according to the fault terrace position where each section of a well body is located, and the seismic time-depth relationship of more than two drilled fault terrace single wells is established. The seismic interpretation precision of fault terrace structures is improved.

Description

technical field [0001] The invention relates to a calibration method for improving the accuracy of seismic interpretation of fault-step structures, which belongs to the field of oil and gas rolling development, and is applicable to the technical field of fine seismic interpretation of contiguous fault-step structures in old areas. Background technique [0002] The exploration and development of oilfields in central and eastern China has entered the middle and late stages, and the fine development of oilfields is imminent. Improving the calibration accuracy between the strata encountered by each well and the seismic phase in the target area is the key to improving the accuracy of seismic structure interpretation. At present, the commonly used calibration of well drilling and seismic phase depends on the seismic time-depth relationship. There are two methods to establish the seismic time-depth relationship. The first method is the time-depth relationship of points instead of pl...

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Application Information

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IPC IPC(8): G01V1/36
CPCG01V1/36G01V2210/52
Inventor 张天增马艳艳熊运斌梁国胜冯坤茂任宏李春爱彭有聪
Owner CHINA PETROLEUM & CHEM CORP
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