A Hydrocarbon Migration and Accumulation Characteristics of the Chang 9 Reservoir Group of the Yanchang Formation in Upper Triassic of Ordos Basin

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Gao, Pengpeng^1^2 ; Gao, Shengli^1^2 ; Wen, Fenggang^3 ; Gao, Fengbo^4

Xi'An Shiyou University, Xi'an

710065, China^1

State Key Laboratory of Continental Dynamics, Northwest University, Xi'an

710069, China^2

Research Institute of Shaanxi Yanchang Petroleum (Group)Co Ltd., China^3

Shaanxi Yanan Petroleum Corp. Ltd., China^4

关键词: Genesis mechanism;    Hydrocarbon migration;    Hydrocarbon source rocks;    Hydrocarbon sources;    Paleo structures;    Ultra-low permeability reservoirs;    Upper Triassic;    Yanchang Formation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/5/052012/pdf
DOI  :  10.1088/1755-1315/310/5/052012

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Groups of reservoirs were found in the deep zones of Upper Triassic Yanchang formation and the feature of hydrocarbon source rocks, the characteristics of overpressure and genesis mechanism of abnormal overpressure was studied in this paper. The factors of accumulation in lower part of Yanchang formation are different,which could be divided into three types: controlling reservoir, paleo structure controlling reservoir and reservoir controlled by pressure & paleo structure. It is shown that the reservoir distributed in where hydrocarbon source developed, the delta-front and gravity-flow sediment are the main areas for the ultra-low-permeability reservoirs and the places of low-overpressure are the preferential places for hydrocarbon migration & accumulation.