Volcanic rock weathering crust identification and classification standard based oil and gas exploration method

Abstract

The invention relates to a volcanic rock weathering crust identification and classification standard based oil and gas exploration method. The volcanic rock weathering crust identification and classification standard based oil and gas exploration method comprises sorting basic data, performing well selection at the target position, establishing a water volcanic rock stratum contained volcanic rock weathering crust secondary porosity well logging evaluation model, establishing an oil-gas cement quality volcanic rock stratum contained volcanic rock weathering crust secondary porosity well logging evaluation model, obtaining a secondary porosity index in an oil-gas cement quality volcanic rock weathering crust, establishing a volcanic rock weathering crust structural identification and classification standard and performing oil and gas reserve evaluation according to structural characteristics of a volcanic rock weathering crust. According to the volcanic rock weathering crust identification and classification standard based oil and gas exploration method, the problem that analysis test data are less in the past and accordingly quantitative identification and classification cannot be performed on the volcanic rock weathering crust structure is solved, the area range of the identification and classification of the volcanic rock weathering crust structure is widened, and accordingly the oil field scientific research personnel can identify and classify out the volcanic rock weathering crust structure easily and the establishment of the volcanic rock weathering crust well logging evaluation models and the identification and classification standard is scientific and universal.

Description

technical field [0001] The invention relates to an oil and gas exploration method, in particular to an oil and gas exploration method based on identification and division standards of volcanic rock weathering crust. Background technique [0002] Some domestic scholars first carried out research on the characteristics of volcanic rock weathering crust and the influence of volcanic rock weathering crust characteristics on oil and gas storage in Xinjiang, Santang Lake and other western regions, mainly analyzing field outcrops, drilling cores, microscopic thin sections, and main reservoirs in the above areas. The weathering crust of volcanic rocks is divided into five zones, namely the final decomposition product (soil), hydrolysis zone, leaching zone, disintegration zone and unweathered zone. Subsequently, some scholars successively carried out related research in the eastern region, mainly on the influence of the leaching phenomenon of the top weathering zone of the volcanic r...

AI Technical Summary

Problems solved by technology

However, there is no report on the method of dividing the structure of volcanic rock weathering crust by using the acoustic transit time log curve, density log curve, deep lateral resistivity log curve and shallow lateral resistivity log curve

Images