Evaluation Method of Fractured-Vuggy Carbonate Reservoir Based on Seismic-Log Calibration

Abstract

The invention discloses a fracture-vuggy carbonate reservoir evaluation method based on seismic-logging calibration, comprising the following steps: a. performing borehole collapse correction, multi-well standardization and consistency processing on the logging curve; b. . Load the processed logging and seismic data for well-seismic calibration, extract wavelets suitable for the target layer, and perform post-stack deterministic inversion and post-stack geostatistical inversion; c. The relationship between the reservoir evaluation parameter porosity, and the multi-well impedance and porosity chart are preliminarily obtained; d. The relationship between the lost circulation of some wells and the venting section porosity, acoustic time difference and density is calculated, and the multi-well impedance and porosity chart is corrected ; e. Using the multi-well impedance and porosity chart to obtain the porosity data body; f. Using the porosity data body to evaluate the fractured-cavity carbonate reservoir. The invention realizes the accurate evaluation of the characteristics of the fracture-vug carbonate rock reservoir.

Description

technical field [0001] The invention relates to the seismic technical field of petroleum exploration, in particular to an evaluation method for fracture-cavity carbonate rock reservoirs based on seismic-logging calibration used in petroleum seismic exploration. Background technique [0002] The current conventional reservoir evaluation method in oil exploration is mainly to comprehensively use the actual drilling, logging, core and other basic data to conduct research on reservoir lithology, physical properties and fluids, etc., so as to obtain a series of reservoir properties such as porosity and permeability. Layer evaluation parameters. Because the accuracy of the evaluation of the reservoir directly affects the later development, if the development is carried out according to the wrong evaluation, it will cause huge economic losses. Therefore, it is very important to accurately evaluate the reservoir. [0003] For fractured-cavity carbonate reservoirs, there are the fo...

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Problems solved by technology

[0004] (1) In the actual drilling process of fractured-cavity carbonate reservoirs, drilling fluid leakage and venting are prone to occur, resulting in missing or distorted logging curves in reservoir intervals;

[0005] (2) Since the bottom of large-scale fractured-cavity body reservoirs is usually a water layer with well-developed fractures, large-scale fracturing is required to be commercially put into production

[0008] For the above problems, no effective solution has been proposed

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