Development Progress and Key Technologies for Cost-Effective Productivity of Shale Oil in Junggar Basin

doi:10.7657/XJPG20250606

Abstract

Abstract:

The Junggar Basin holds abundant mixed shale oil, with total resources of 34.9×10⁸ t booked, which is the main strategic target for Xinjiang oilfield to achieve additional reserves and production. However, the strong heterogeneity of mixed shale oil reservoirs makes sweet spot identification and evaluation challenging, limits the promotion of available technology system, and threatens the large-scale and cost-effective development. The enrichment patterns and reservoir characteristics of shale oil in the Junggar Basin, and the corresponding engineering processes/technologies are systematically analyzed in this paper. The technologies formed during the exploration and development of mixed shale oil are summarized, mainly with respect to sweet spot identification, supporting engineering, and development deployment. The differential enrichment theory of mixed shale oil is constructed, and a cost-effective shale oil productivity model integrating sweet spot identification, three-dimensional deployment, excellent fast drilling and completion, efficient fracturing, and environmental protection is established. These achievements support the construction of the first national demonstration zone for continental shale oil in China, and guide the efficient exploration and development of continental shale oil in the country.

Key words: Junggar Basin, mixed shale oil, Jimsar sag, Mahu sag, cost-effective productivity

CLC Number:

TE122

WEI Zhaosheng, QI Hongyan, ZHAO Jianfei, HE Jixiang, LIU Kecheng, WANG Junchao. Development Progress and Key Technologies for Cost-Effective Productivity of Shale Oil in Junggar Basin[J]. Xinjiang Petroleum Geology, 2025, 46(6): 703-711.

Figures/Tables 9

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井名	水平段长度/m	油层长度/m	段数/ 簇数	压裂方式	平均段间距/m	平均簇间距/m	加砂强度/ （m³·m^-1）	最大日产油量/t	首年产油量/t
JHW023井	1 237	1 196	27/79	固井桥塞	45	15.2	2.06	75.1	15 373
JHW025井	1 240	1 149	27/79	固井桥塞	45	15.2	2.06	92.1	11 928

区块	深度/m	抗压强度/MPa	硬度等级	沉积环境	岩性	钻揭层系	压力系数
鹰滩油田	1 200~4 300	80~400	3~6	海相沉积	黑色钙质页岩	8	1.4~1.7
胜利油田	3 500~5 300	120~330	6~7	陆相沉积	石灰质泥页岩、泥质灰页岩	4	1.2~1.9
新疆油田吉木萨尔凹陷	3 400~4 500	130~340	5~6	陆相沉积	粉砂页岩、白云质粉砂页岩	11	1.3~1.5
新疆油田玛湖凹陷	4 500~5 500	430~728	9	陆相沉积	白云质泥岩、粉砂页岩、硅质页岩	11	1.2~1.9