Geology single-layer data depth time conversion method and device for seismic data explanation

Abstract

The invention provides a geology single-layer data depth time conversion method and device for seismic data explanation. The geology single-layer data depth time conversion method includes: using a seismic marker bed position nearest to the upper portion of a target series of strata as the initial position of calculating to extract time and depth initial values; obtaining the geology single-layer depth values to be calculated from an oil filed geology stratified data table to serve as the target depth values in deep time conversion; adopting an interval transit time curve, performing depth time conversion calculation from the initial depth downwards in a point-by-point recurrence mode until reaching the target depth, and solving the time value corresponding to the target geology single layer; and using the seismic data explanation layer position under the target series of strata as the reference, comparing errors between time values of well logging speed calculation and actual seismic wave travel time values, performing error correction in an error averaging method, and outputting the rectified results to obtain the final geology single-layer time values.

Description

technical field [0001] The invention relates to a processing technology for geological sublayer data used in seismic data layer fine interpretation and seismic inversion, and is a method for deep-time conversion of geological sublayer data based on acoustic logging curves for seismic data interpretation. Background technique [0002] According to statistics, the vast majority of reservoirs in my country's oilfields are continental clastic deposits, of which the reserves of inland river-delta and alluvial fan-fan delta deposits account for more than 90% of the total. This kind of deposition is multi-cycle, which makes my country's onshore oilfields have many small geological layers in the vertical direction, and some have as many as dozens or even hundreds of layers. Such geological conditions determine that my country's oilfield development is usually based on geological sublayers. Long-term oilfield development and production practices have formed a series of technologies a...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for deep-time conversion of geological sublayer data for seismic data interpretation. The deep-time conversion does not consider the problems of velocity error and error accumulation in the two technologies of well logging and seismic in view of the prior art. , using the upper and lower seismic marker layer constraints and the method of sampling point error sharing, the depth sampling point interval and the average velocity of the acoustic time difference provided by the acoustic time difference logging curve are recursively calculated point by point, and the deep-time conversion of high-precision geological sublayer data is realized

Images