An Analysis of Distribution of Carboniferous Source Rocks and Exploration Potential Analysis in Eastern Junggar Basin

doi:10.11885/j.issn.1674-5086.2020.11.18.02

Abstract

Abstract: Well fu26 of Fudong Slope in eastern Junggar Basin obtained high yield flow in the carboniferous system and Well cheng1 of Gucheng Sag showed good results, revealed thick layer source rocks, confirming that the Carboniferous in the southeast of the Junggar Basin has a hydrocarbon source for the formation of large natural gas scenes. In order to further realize the exploration potential of Carboniferous natural gas in the east of Junggar Basin, this paper, based on the analysis of regional geological strata, structural pattern and well earthquake matching of Carboniferous system, comprehensively implements the range and scale of Carboniferous source rocks, and points out the direction of recent exploration in this area. The study of regional strata shows that Songkarsu Formation b is the main effective hydrocarbon source rock segment of carboniferous; the structural pattern analysis shows that Eastern Junggar Basin developed two major depression systems:the north and the south depression, the north depression has been discovered on a large scale, and the south depression developed large scale Carboniferous source rock, which is the key area to be explored in the next step; well-seismic matching analysis shows that there are mainly four major sags, Dongdaohaizi, Fukang, Jimsar and Gucheng in the south depression. Among them, the source rocks in Fukang and Jimusar depressions have wide distribution range, large thickness and high gas generation intensity, and have the resource basis for large-scale natural gas.

Key words: Eastern Junggar Basin, Carboniferous, regional strata analysis, structural pattern analysis, source rock, exploration potential

CLC Number:

TE122

WU Xiaoning, DENG Yong, LIU Xiaohu, ZHU Feng, MIAO Jinpeng. An Analysis of Distribution of Carboniferous Source Rocks and Exploration Potential Analysis in Eastern Junggar Basin[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(4): 14-26.

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