The Horizontal Well Exploitation Practice of Jimsar Shale Oil

doi:10.11885/j.issn.1674-5086.2021.01.21.01

Abstract

Abstract: Shale oil field of Lucaogou Group Jimusar Sag in Junggar Basin development test shows that horizontal wells in different areas at the same sweet spot layer greatly in production, and that sigle well productivity and mayor controlling EUR factor are not clear and have brought difficulties to reservoir development scheme establishment, reservoir reconstruction mode choice and benefit evaluation has brought many difficulties. Therefore, through integrated researches of seismic, logging, analysis and laboratory testing, the geological characteristics of the high-frequency interbed of source and reservoir are defined. The source and reservoir configuration and preservation conditions are the congenital factors affecting the oil bearing of the target reservoir. Using special logging, microseismic and fluid production profile monitoring, we find that the length of horizontal section and complex fracture network are important factors affecting productivity. Based on the laboratory model test and the comprehensive analysis of reservoir production performance, the reasonable drainage and production system of horizontal well after fracturing is preliminarily determined. According to the research, the sweet spot of shale oil has strong heterogeneity, and the high quality sweet spot penetration rate and the maximum complexity of fracture network reconstruction are the goals that must be pursued to improve the productivity of horizontal wells, and a reasonable drainage and production system is conducive to giving full play to the production capacity of horizontal wells.

Key words: Jimsar Sag, shale oil, horizontal well, volumetric fracturing, production capacity

CLC Number:

TE349

WU Chengmei, XU Changfu, CHEN Yiwei, TAN Qiang, XU Tianlu. The Horizontal Well Exploitation Practice of Jimsar Shale Oil[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(5): 33-41.

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