A Method for Evaluation of Production Status of Carbonate Gas Reservoir Reserves

Abstract

The invention relates to an evaluation method of carbonate gas pool reserve utilization conditions. According to the evaluation method, logging information is fully utilized and subjected to multi-element combination to obtain percolation characteristic parameters which are used for evaluating gas pool reserve utilization conditions in a quantitative mode, and the parameters fully consider the lithology, shale content, gas content, permeability, pore structure types and pore structure coefficients of reservoir stratums and can accurately reflect the difference between inter-layer and in-layer percolation ability of carbonate gas pool small layers and the reserve utilization degree. The random modeling means is effectively utilized to set up a three-dimensional percolation characteristic parameter continuous geologic model, so that percolation characteristic parameter inter-well prediction is carried out, the smoothing effect of a traditional interpolation method (like the Kriging method) to parameters is overcome, the anisotropism of carbonate gas pool reservoirs is really reflected, technical support is provided for effective utilization of gas pool reserves, the continuous stable yield foundation of a gas pool is enhanced, and the purpose of improving the ultimate recovery factor of the gas pool is achieved.

Description

technical field [0001] The invention relates to a method for evaluating the production status of reserves of carbonate gas reservoirs, belonging to the technical field of prediction and evaluation of carbonate gas reservoirs. Background technique [0002] Carbonate gas reservoirs have high sulfur content, deep burial, large reservoir thickness, rapid sedimentation and diagenetic facies, serious vertical and horizontal heterogeneity of reservoirs, uneven production of gas reservoir reserves in space, and great difficulty in development; in addition , long well intervals, heterogeneous gas well multi-layer combined production, and wellbore liquid accumulation is common, there is still gas layer production below the liquid level, the production profile test accuracy is affected, production profile data show that the test gas production thickness is smaller than the actual production The thickness, the gas production rate of the gas layer below the liquid surface, and the positi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a comprehensive logging evaluation parameter, three-dimensional visualization and intuitive Method for Quantitatively Evaluating Reserve Production Status of Carbonate Gas Reservoirs

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