Migration and accumulation mechanisms and main controlling factors of tight oil enrichment in a continental lake basin

被引：7
|
作者：
Hu, Suyun [1 ]
Tao, Shizhen [1 ]
Wang, Min [1 ,2 ]
Pang, Zhenglian [1 ]
Bai, Bin [1 ,2 ]
Chen, Yanyan [1 ,2 ]
Lu, Shuangfang [2 ]
Chen, Yue [1 ]
Yang, Yiqing [1 ]
Jin, Xu [1 ]
Jia, Jinhua [1 ]
Wang, Jian [1 ]
Zhang, Tianshu [1 ]
Lin, Senhu [1 ]
Wu, Yinye [1 ]
机构：
[1] PetroChina, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
[2] China Univ Petrolum East China, Qingdao 266580, Peoples R China
来源：
PETROLEUM EXPLORATION AND DEVELOPMENT | 2023年 / 50卷 / 03期
关键词：
tight oil; NMR displacement physical simulation; Lattice Boltzmann numerical simulation; migration and accu-mulation mechanism; enrichment-controlling factor; continental lake basin; tight reservoir; DYNAMIC CAPILLARY-PRESSURE; UNCONVENTIONAL OIL; 2-PHASE FLOW; GAS;
D O I：
10.1016/S1876-3804(23)60409-4
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Based on the typical dissection of various onshore tight oil fields in China, the tight oil migration and accumulation mechanism and enrichment-controlling factors in continental lake basins are analyzed through nuclear magnetic resonance (NMR) displacement physical simulation and Lattice Boltzmann numerical simulation by using the samples of source rock, reservoir rock and crude oil. In continental lake basins, the dynamic forces driving hydrocarbon generation and expulsion of high-quality source rocks are the foundational power that determines the charging efficiency and accumulation effect of tight oil, the oil migration resistance is a key element that influences the charging efficiency and accumulation effect of tight oil, and the coupling of charging force with pore-throat resistance in tight reservoir controls the tight oil accumulation and sweet spot enrichment. The degree of tight oil enrichment in continental lake basins is controlled by four factors: source rock, reservoir pore-throat size, anisotropy of reservoir structure, and fractures. The high-quality source rocks control the near-source distribution of tight oil, reservoir physical properties and pore-throat size are positively correlated with the degree of tight oil enrichment, the anisotropy of reservoir structure reveals that the parallel migration rate is the highest, and intralayer fractures can improve the migration and accumulation efficiency and the oil saturation.
引用
收藏
页码：547 / 557
页数：11
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