Carbonate rock fault solution reservoir cave logging comprehensive evaluation method

Abstract

The invention discloses a carbonate rock fault solution reservoir cave logging comprehensive evaluation method. A main control module of a logging comprehensive evaluation system is used for judging the type of a reservoir by calling an identification module for reservoir types such as a cave and the like, judging the type of a formation reason of a filling material by calling a cave filling material formation reason type identification module, judging the lithology type of the filling material by calling a cave filling material type judgment module, and calculating the cave filling degree bycalling a cave filling degree evaluation module. The method has the beneficial effects that the sensitive logging type is researched from logging response characteristics of the reservoir types, judgment standards are summarized, a sensitive indication parameter is put forward, a software module is formed, and a reservoir type indication curve is output; and the comprehensive representation contents for the cave are comprehensive and comprise not only the qualitatively judged formation reason type and lithology type of the cave filling material but also the semi-quantitatively evaluated filling degree, and the comprehensive evaluation of the cave of the carbonate rock fault solution reservoir cave can be realized.

Description

technical field [0001] The invention relates to the field of petroleum exploration, in particular to a comprehensive evaluation method for cave logging in fault-karst reservoirs of carbonate rocks. Background technique [0002] 1. Existing technical solutions [0003] Carbonate fault-karst body is a new type of reservoir discovered in recent years, which is mainly formed by fault-controlled dissolution. From the analysis of the characteristics, the carbonate rock fault-karst reservoirs are distributed in various shapes, including three types: strip, sandwich cake and flat. The storage space is complex and the reservoir types are diverse. The fractured-vuggy carbonate reservoir space mainly includes matrix pores (dissolution pores), fractures, caves, etc. According to different scales, carbonate strata can be divided into large-scale caves and small-scale fractured-vuggy reservoirs. According to the configuration of reservoir space, fractured-vuggy carbonate reservoirs are ...

AI Technical Summary

Problems solved by technology

[0006] The current comprehensive evaluation technology is mainly limited to the identification of caves and the interpretation of the lithology type of fillings, and the method adopted only uses the crossplot method and its discrimination criteria for analysis, without explaining the origin of fillings, and the degree of filling is not explained. The degree of quantitative understanding is not high

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