Geological characteristics and exploration and development practice of the Permian full oil and gas system in Jimsar Sag, Junggar Basin

doi:10.3969/j.issn.1672-7703.2023.04.002

Abstract

Abstract: Based on the study of source rock, sediment source system, tectonic evolution and dynamic matching relationship between hydrocarbon source and reservoir, the Permian oil and gas bearing system in Jimsar Sag is analyzed in detail. The study results indicate that the Permian in Jimsar Sag has favorable geological conditions for forming full oil and gas system. On the plane, shale oil, tight oil, conventional glutenite oil reservoirs are distributed in sequence from the central to the marginal sag, and tight oil, shale oil, conventional glutenite oil reservoirs are distributed upward around the high-quality source rock in Lucaogou Formation, showing the overall hydrocarbon accumulation characteristics of “full oil and gas system”. Guided by this understanding, breakthroughs have been made in the exploration of three types of oil reservoirs, basically forming a pattern of oil bearing in the whole sag and orderly co-occurrence and superposition of multi-layer and multi type oil reservoirs. By applying the large platform and multi-layer stereoscopic development mode, the exploration idea and technology for maximizing the benefit resource utilization are gradually mature in practice. The detailed analysis of geological characteristics, hydrocarbon accumulation pattern, and exploration and development practice of the Permian full oil and gas system in Jimsar Sag is of great significance for enriching the exploration theory of the full oil and gas system and guiding the exploration and development in similar oil rich sags.

CLC Number:

TE112.1

Zhi Dongming, Li Jianzhong, Yang Fan, Kang Jilun, Zhang Wei, Ma Qiang, Tao Linben. Geological characteristics and exploration and development practice of the Permian full oil and gas system in Jimsar Sag, Junggar Basin[J]. China Petroleum Exploration, 2023, 28(4): 14-23.

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