Oil-gas zone effective evaluation method and device

Abstract

The invention provides an oil-gas zone effective evaluation method and device. The oil-gas zone effective evaluation method comprises control factor parameter distribution of an interval of interest,wherein control factor parameters comprise stratigraphic dip, fault, effective unconformity with effective hydrocarbon generation range of hydrocarbon source rocks, reservoir thickness, cover thickness, oil generation abundance and gas generation abundance; obtaining evaluation parameter lower limit of an industrial value oil and gas reservoir, wherein evaluation parameters comprise reservoir thickness, porosity, cover thickness, oil generation abundance and gas generation abundance; obtaining a reservoir formation parameter value of each grid coordinate point according to the control factor parameter distribution; obtaining an evaluate parameter processing value of each grid coordinate point according to the evaluation parameters of the grid coordinate point, the evaluation parameter lower limit and the reservoir formation parameter value; and obtaining a zone evaluation value of the interval of interest according to the evaluation parameter processing value of each grid coordinate point. The invention provides the oil-gas zone effective evaluation method and device capable of improving evaluation coincidence rate.

Description

technical field [0001] The invention relates to the technical field of evaluation methods for oil and gas exploration zones, in particular to a method and device for evaluating the effectiveness of oil and gas zones. Background technique [0002] Effectiveness evaluation of oil and gas plays is to evaluate whether there are oil and gas reservoirs of industrial value in the play. The effectiveness evaluation of oil and gas plays is the key to determine the success rate of drilling, and determine the rate of oil and gas discovery and reserve growth. [0003] The evaluation methods of oil and gas play effectiveness in the prior art include: R factor principal component analysis method, multi-factor weighted evaluation method, multi-map overlay play evaluation method, play semi-quantitative evaluation method, and resource and economical evaluation method. evaluation method. [0004] The R factor principal component analysis method cannot evaluate a single zone, and the conditi...

AI Technical Summary

Problems solved by technology

The multi-map superimposed zone evaluation method cannot achieve quantitative evaluation. For areas with a low degree of exploration, it is impossible to accurately obtain single-factor maps of the evaluated area, and the evaluation coincidence rate is low

In the play semi-quantitative evaluation method, the control factor parameter values ​​of different oil and gas plays are quite different, and the applicability of the established evaluation parameter standards is limited. At the same time, it is impossible to obtain accurate parameter values ​​for areas with a low degree of exploration, and the evaluation coincidence rate is low.

Evaluation methods based on resources and economics The amount of resources cannot determine whether the zone can obtain industrial value oil and gas reservoirs, and it is difficult to evaluate the economics of the zone before drilling, and the evaluation coincidence rate is not high

[0005] Existing oil and gas play evaluation technologies are mainly based on geological condition analogy, mathematical model calculation, resource quantity evaluation, multi-factor superimposition and other evaluation methods, which are greatly affected by human experience and the degree of mastery of data, so it is impossible to formulate a unified play effective However, the evaluation criteria cannot be unified, that is, it is impossible to achieve a unified evaluation of the effectiveness of the zone, and the compliance rate of the zone evaluation is low.

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