Method for building initial geologic model based multilayer multiple wells

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...

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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 factors will be calculated for different layers. If a single layer conversion factor is used for calculation in a multi-layer structure, there will be calculation problems. imprecise question

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