Method for evaluating heterogeneous characteristics of reservoir continuously and quantitatively by applying resistivity imaging logging data

Abstract

The invention discloses a method for evaluating heterogeneous characteristics of a reservoir continuously and quantitatively by applying resistivity imaging logging data. The resistivity imaging logging data of each depth point distributed along a well circumference is converted to porosity through a formation factor formula; a heterogeneous characteristic spectrum can be obtained by studying the distribution of different depth porosity data; morphological characteristics of the heterogeneous characteristic spectrum are analyzed; heterogeneous characteristic parameters, such as a mean value, a homogeneity coefficient, a variance, a peak value, a quality factor and the like, are calculated; and researches, such as lithology identification, effectiveness classification of the reservoir, remaining oil distribution and the like, can be carried out. The method provided in the invention improves the ability of the logging data to evaluate the heterogeneous characteristics of the reservoir; and a great number of parameters capable of reflecting the heterogeneous characteristics of the stratum are obtained. Compared with the method of purely using the conventional logging data to evaluate the heterogeneous characteristics of the reservoir, the new method has incomparable advantage, the method has higher promotional value and social benefit.

Description

technical field [0001] The invention relates to a method for continuously and quantitatively evaluating reservoir heterogeneity characteristics using resistivity imaging logging data in the field of geological exploration data processing methods. Background technique [0002] The research on reservoir heterogeneity began in the 1970s and 1980s, aiming at improving the development effect and predicting the distribution of remaining oil. The influence has gradually attracted people's attention. Reservoir heterogeneity means that the reservoir is affected by the depositional environment, diagenesis and tectonic process during the formation process, and there are uneven changes in spatial distribution and various internal attributes. This change also affects the underground oil, gas and water. The main factor of the flow characteristics. The traditional representation of reservoir heterogeneity is generally characterized by a single parameter, which is reflected by parameters ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the technical problem that the application of conventional logging data to evaluate reservoir heterogeneity has a single parameter and cannot fully reflect reservoir heterogeneity, and proposes a continuous and quantitative evaluation of reservoirs using resistivity imaging logging data The method of heterogeneity features makes full use of the characteristics of large coverage area and high resolution of resistivity imaging logging data

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