东营凹陷民丰洼陷古近系沙四上亚段页岩油微运移模拟实验

doi:10.12108/yxyqc.20260510

Lithologic Reservoirs ›› 2026, Vol. 38 ›› Issue (5): 104-114.doi: 10.12108/yxyqc.20260510

• PETROLEUM EXPLORATION • Previous Articles Next Articles

Simulation experiment on shale oil micro-migration of upper submember of the fourth member of Shahejie Formation in Paleogene of Minfeng Subsag, Dongying Sag

CHEN Yumao¹(), LI Bin²^,³(), LIU Haojie¹, YANG Hongwei¹, GAI Shanshan¹, HOU Qingjie¹, DENG Taiyu²

¹ Geophysical Research Institute, Shengli Oilfield, Sinopec, Dongying 257022, Shandong, China
² School of Geosicence and Technology, Southwest Petroleum University, Chengdu 610500, China
³ Natural Gas Geology Key Laboratory of Sichuan Province, Chengdu 610500, China

Received:2026-03-16 Revised:2026-04-16 Online:2026-09-01 Published:2026-09-04
Contact: LI Bin E-mail:chenyumao.slyt@sinopec.com;lbin@swpu.edu.cn

Abstract

Abstract:

To address the unclear enrichment patterns and difficulty in sweet spot prediction of shale oil in upper submember of the fourth member of Shahejie Formation (Es4^s) in Minfeng Subsag, Dongying Sag, a geological model of the shale petroleum system was constructed by integrating well-seismic data. By employing the Easy%R_o kinetic model and the percolation method, the thermal evolution history and micro-migration process of Es4^s shale were simulated, respectively. And then the shale oil enrichment model was clarified and “sweet spot” zones were predicted. The results show that：（1） Source rocks of Es4^s entered the low-maturity stage during the late deposition of Shahejie Formation, reached the maturity stage during the deposition of Dongying Formation, and attained the peak hydrocarbon generation stage during the deposition of Guantao Formation, with maturity of 0.5%-1.2%, indicating oil-prone characteristics. The simulated hydrocarbon generation conversion rate was 10%-90%.The hydrocarbon generation conversion rate in the lower part was significantly higher than that in the upper part of lower submember of Es4, while the upper part had lower hydrocarbon expulsion potential, with hydrocarbon primarily retained and adsorbed. （2） Shale oil micro-migration in the study area shows significant facies-controlled characteristics,with the mixed sedimentary facies zone containing considerably more shale oil than that in the feldspar-rich and lime-rich facies zones. Fluid potential simulation confirms the development of inhe-rited low-potential accumulation areas in the eastern (FY1-2HF well area) and western (FY1-4HF well area) parts of the study area, which aligns with the productivity of high-yield wells. （3） The shale oil enrichment model in the study area is characterized by “hydrocarbon source controlled by thermal evolution, enrichment controlled by laminae, and accumulation controlled by low uplifts”. The mixed sedimentary shale in the lower part of Es4^s within the eastern and western salients was identified as the sweet spot.

Key words: hydrocarbon micro-migration, fluid potential, hydrocarbon accumulation simulation, percolation flow, shale oil, shale lithology, seismic constraint, upper submember of the fourth member of Shahejie Formation, Minfeng Subsag

CLC Number:

TE121.1

CHEN Yumao, LI Bin, LIU Haojie, YANG Hongwei, GAI Shanshan, HOU Qingjie, DENG Taiyu. Simulation experiment on shale oil micro-migration of upper submember of the fourth member of Shahejie Formation in Paleogene of Minfeng Subsag, Dongying Sag[J].Lithologic Reservoirs, 2026, 38(5): 104-114.

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岩相类型	样品数/个	w（矿物）/%			TOC/%	S₁/(mg·g^-1)	孔隙度/%	渗透率/mD	结构特征
岩相类型	样品数/个	黏土矿物	长英质	灰质	TOC/%	S₁/(mg·g^-1)	孔隙度/%	渗透率/mD	结构特征
富灰相	139	30~55	20~50	20~60	2.5~5.0	3~6	2~10	0.1~0.5	纹层发育
混积相	195	30~70	25~65	20~55	3.0~6.0	4~6	4~12	0.1~2.0	纹层发育
富长英质相	85	20~55	30~80	15~30	2.0~4.0	2~6	3~13	0.2~2.0	薄互层结构

Simulation experiment on shale oil micro-migration of upper submember of the fourth member of Shahejie Formation in Paleogene of Minfeng Subsag, Dongying Sag

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