Geological Reserves Assessment and Petroleum Exploration Targets in Shunbei Oil & Gas Field

doi:10.7657/XJPG20210201

Abstract

Abstract:

Shunbei oil & gas field is a typical fault-controlled one, in which the formation and evolution of the reservoirs are closely related to fault activities. The basic constitution and scale of the reservoirs are not affected by water-rock interaction, which are essentially different from dissolved fractured-vuggy reservoirs. The geological reserves assessment methods established for dissolved fractured-vuggy reservoirs are hardly applicable for assessing the geological reserves and making exploration decisions for the fault-controlled reservoirs. In view of the characteristics of the fault-controlled reservoirs, we extracted weak, diffracted and low-frequency signals of the horizontal layered and anisotropic medium, and improved the 3D image quality of the steep strike-slip fault zones, and finally developed a comprehensive analytical technology for assessing the strike-slip fault zones. On this basis, using innovative methods and technologies like 3D description and facies-controlled inversion, a series of technologies such as reservoir description, reserves assessment and resource optimization and evaluation were established for fault-controlled fractured-vuggy reservoirs. Since applying these methods to 18 first-order fault zones in Shunbei oil & gas field, 1.7 billion tons of OOIP(oil equivalent) has been proved, and a production capacity of 1 million tons of oil equivalent per year has been constructed. In addition, based on the overall petroleum geological conditions and evaluation of exploration zones, it’s found that hydrocarbon accumulate in the whole field, and the exploration zones outside the first-order fault zones also have abundant resources and great exploration potentials. These understandings point out the future directions and successive plays for oil and gas exploration, and lay a foundation for the middle-long term development of Shunbei oil & gas field.

Key words: Tarim basin, Shunbei oil & gas field, fault-controlled reservoir, geological reserves, resource potential, exploration direction

CLC Number:

TE112.6

QI Lixin, YUN Lu, CAO Zicheng, LI Haiying, HUANG Cheng. Geological Reserves Assessment and Petroleum Exploration Targets in Shunbei Oil & Gas Field[J]. Xinjiang Petroleum Geology, 2021, 42(2): 127-135.

Figures/Tables 6

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