Geological Characteristics and Exploration Prospect of Carbonate Source Rock Gas in Sichuan Basin

doi:10.11885/j.issn.1674-5086.2020.10.20.03

Abstract

Abstract: By means of thin section observation, petrophysical property analysis, scanning electron microscope, X-ray diffraction, isotope analysis and other laboratory test methods, combined with logging data analysis, seismic profile interpretation and other research, starting from the determination of geochemical evaluation parameters and indicators of carbonate source rock gas, taking stable high production gas reservoir in Nanchuan area as an example, this paper makes full use of the original samples such as outcrop, drilling core, cuttings, dissects the characteristics of source rock, petrophysical property, petroelectrical property, gas bearing property and hydrocarbon generation potential of carbonate rocks in the first member of Maokou Formation in Sichuan Basin, and discusses the positive role of supergene sedimentary environment, early diagenesis, especially the evolution series of magnesium rich clay minerals on the enrichment of organic matter, generation and accumulation of carbonate gas in carbonate rocks, so as to clarify the main control factors of stable high production of gas reservoirs and implement the characteristics and distribution of "sweet spot", and indicate the prospect of exploration and development in this field.

Key words: carbonate source rock gas, the first member of Maokou Formation, Sichuan Basin, stable high yield, magnesium rich clay minerals

CLC Number:

TE122

GUO Tonglou. Geological Characteristics and Exploration Prospect of Carbonate Source Rock Gas in Sichuan Basin[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(1): 1-16.

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