Gas Transporting Conditions for Formation of Large-and Medium-Sized Gas Fields in Different Types of Basins of China

Abstract

Abstract: The characteristics of gas migrating channels of large-and medium-sized gas fields in different types of basins of China are analyzed, it is believed that no matter what the basin types are, faults or fractures act as the main gas migrating channels. This paper presents the definition and the calculation of comprehensive evaluation parameters for gas transporting capability of gas pools and studies the capabilities of 46 large-and medium-sized gas fields in domestic three types of basins where the faults act mainly as gas migrating channels. The study shows that the large-and medium-sized gas fields in Cratonic basin possess the highest or strongest gas transporting capability, those in foreland basin have medium one and those in rift basin are the lowest. By definition, calculation and study, it is shown that the gas accumulation efficiency of foreland basin is the highest, that of rift basin is medium, that of Cratonic basin is the lowest. By study of relationship between the gas accumulation efficiencies and the comprehensive evaluation parameters, it is believed that the foreland basin is of the greatest effect of gas transporting capability on the gas accumulation efficiency, the rift basin is of medium one and Cratonic basin is of the smallest. This paper also presents that the minimum value of comprehensive evaluation parameters required for forming gas transporting capability of high efficiency of foreland basin is about 1.6×10^-14 m/s, that of rift basin is about 2.0×10^-14 m/s and that of Cratonic basin is about 5.2×10^-14 m/s.

Key words: large-and medium-sized gas fields, transporting capability, foreland basin, Cratonic basin, rift basin

CLC Number:

TE112.12

FU Guang, YU Dan, LV Yan-fang. Gas Transporting Conditions for Formation of Large-and Medium-Sized Gas Fields in Different Types of Basins of China[J]. Xinjiang Petroleum Geology, 2006, 27(3): 273-276.

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