Method for establishing multi-well model based on correlation coefficient method

A correlation coefficient method and correlation coefficient technology, applied in seismic signal processing and other directions, can solve problems such as practical limitations, wrong calculation results, and inapplicability

Active Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, this algorithm has practical limitations in the actual work area. When the work area is complex, the formation structure between the nearest well and the sought-after path is completely different, which will lead to incorrect calculation results.
Therefore, the algorithm can achieve better results in the case of a single work area structure, but it is not applicable in the case of a complex work area.

Method used

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  • Method for establishing multi-well model based on correlation coefficient method
  • Method for establishing multi-well model based on correlation coefficient method
  • Method for establishing multi-well model based on correlation coefficient method

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Embodiment 1

[0082] In the embodiment, the method of establishing a multi-well model based on the correlation coefficient method according to the exemplary embodiment is described by taking the calculation process of the composite longitudinal wave impedance as an example, and the calculation process of the composite shear wave impedance and composite density is similar.

[0083] Firstly, synthetic seismic records are produced, and horizon calibration is performed on logging data and seismic data, and the calibration data are matched in time and depth;

[0084] Then, for each well in the work area, obtain the seismic record seis(t) i and wellside seismic trace s(t) i stratigraphic transformation factor

[0085] Then, for each well in the work area, calculate the correlation coefficient between the seismic records at the desired position in the work area and the seismic records at the logging position, and use the normalization algorithm to assign the correlation coefficient weight of ea...

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Abstract

A method for establishing a multi-well model based on the correlation coefficient method, comprising the following steps: for each well in the work area, make a synthetic seismic record, perform horizon calibration, and obtain seismic traces next to the well; for each well in the work area, calculate Take the stratigraphic transformation factor between the seismic record at the well and the seismic trace next to the well; for each well in the work area, calculate the correlation between the seismic record at the desired position in the work area and the seismic record at the logging position coefficient; for each well in the work area, calculate the weight of the correlation coefficient of the well; according to the weight of each well in the work area, formation transformation factor, logging compressional wave impedance, logging shear wave impedance, logging density, obtain Synthetic P-wave impedance, composite S-wave impedance, and composite density. This method can establish an initial geological model that is accurate and can meet the needs of the actual work area in the case of complex strata in the work area.

Description

technical field [0001] The invention relates to an electrical digital data processing method in the field of geophysical exploration, in particular to a method for establishing a multi-well model based on a correlation coefficient method. Background technique [0002] Seismic data is a data carrier that contains spatially varying relationships. This relationship can be information about amplitude or other seismic characteristics, and it also reflects the spatial variation of physical properties of underground reservoirs. Therefore, on the premise of known seismic data, with seismic information as the main body and well information as the condition, the spatial variation characteristics of seismic data can be obtained, and then an initial geological model with reservoir spatial variation characteristics can be established. [0003] At present, the method of using multi-well information in the method of establishing an initial address model based on multi-well formation transf...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
Inventor 周单滕龙林正良
Owner CHINA PETROLEUM & CHEM CORP
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