Reservoir characteristic method well-seismic calibration method

Abstract

The invention relates to a reservoir characteristic method well-seismic calibration method, characterized by comprising the steps of 1) establishing a corresponding relation between different lithologic interfaces and seismic reflected waves; 2) selecting a marked well for calibration, establishing a corresponding relation between different oil groups and seismic responses, and determining reservoir characteristics of the different oil groups and characteristics of the seismic responses; 3) extracting sub waves from a seismic trace by well to generate a synthetic record, carrying out fine calibration for internal sands group of the different oil groups, and completing the calibration of the marked well; 4) establishing a well-tie seismic cross-section between a next well to be calibrated and the marked well, taking a VSP of the well to be calibrated or a time-depth relation of the marked well as an initial time-depth relation for calibration, and referring to a corresponding relation between a reservoir of well logging interpretation of the marked well and a seismic reflected in phase axis for calibration; 5) repeating the step 4) to calibrate the next well; and 6) after calibration of all the wells, carrying out quality control through time-depth relation curve overlapping display and statistics of the speed of each well, and completing the reservoir characteristic method calibration.

Description

technical field [0001] The invention relates to a well-seismic calibration method for connecting well logging and seismic information in the process of oil and gas development, in particular to a well-seismic calibration method for reservoir characteristic method. Background technique [0002] With the deepening of exploration and development of oil and gas fields, more and more oil and gas reservoirs with complex structure and lithology are encountered, which brings great difficulties to the development of oil and gas fields. At the same time, for oilfields entering the medium-high water-cut period, the water cut increases and the production decreases. The remaining oil prediction becomes an urgent demand for oilfield development. Therefore, it is necessary to carry out fine structure interpretation and fine reservoir prediction to better solve the problems of complex oil and gas field development and remaining oil prediction of oilfields with medium and high water cut peri...

AI Technical Summary

Problems solved by technology

[0003] The existing well seismic calibration method is mainly based on the waveform correlation between the synthetic record and the side channel seismic record. In this method, when the quality of the well logging acoustic wave curve is poor or there is a special lithology in the reservoir, the synthetic record and the well channel The waveform correlation of side channel seismic records is very low, it is difficult to accurately correspond the reservoir section interpreted by well logging data with the corresponding seismic response on seismic data, and it is easy to cause false correlation when the quality of well logging acoustic curve is poor Realize fine calibration of well seismic

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