Method for building initial geologic model based multilayer multiple wells

A technology of geological model and well-side seismic trace, applied in seismic signal processing and other directions, can solve the problem of inaccurate calculation and achieve the effect of accurate initial model

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

[0003] However, most of the existing methods are calculated under the condition of a single layer. If the target layer is a multi-layer structure, different stratum conversion facto...

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  • Method for building initial geologic model based multilayer multiple wells
  • Method for building initial geologic model based multilayer multiple wells
  • Method for building initial geologic model based multilayer multiple wells

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Embodiment 1

[0084] In the embodiment, the method for establishing an initial geological model based on multiple layers and wells according to an exemplary embodiment is described by taking the calculation process of synthetic compressional wave impedance as an example. The calculation process of synthetic shear wave impedance and synthetic density is similar.

[0085] 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;

[0086] Then, for each well in the work area, the stratigraphic transformation factor between the seismic record and the seismic trace next to the well is calculated along the layer

[0087] Then, for each seismic record sampling point, calculate the correlation coefficient between the seismic record at the position in the work area and the seismic record at the logging position along the layer, and use the normalization algorithm to distribute the ...

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Abstract

A method for establishing an initial geological model based on multiple layers and multiple wells, comprising the following steps: for each well in the work area, for each formation of the well, make a synthetic seismic record, perform horizon calibration, and obtain seismic traces beside the well ; For each well in the work area, for each formation of the well, obtain the stratum conversion factor between the seismic record at the formation place of the well and the seismic trace beside the well; for each well in the work area , for each formation of the well, calculate the correlation coefficient between the seismic record at the desired position in the work area and the seismic record at the logging position; for each well in the work area, for each formation of the well , calculating the weight of the correlation coefficient of the formation for the well. 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 an initial geological model based on multiple layers and multiple wells. Background technique [0002] At present, the method of establishing the initial geological model based on the stratigraphic transformation factor has been developed from single well calculation to the use of multi-well information, and from the method of assigning the weight of each well based on inverse distance weighting to the use of the correlation coefficient method to calculate the required seismic records and The correlation between the seismic records beside each well is used to assign weights, so that the initial model can be established in the case of complex structure in the work area, and the applicability of the modeling method based on the formation transformation factor is improved in the complex work area. [000...

Claims

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Application Information

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