Effects of early oil emplacement on reservoir quality and gas migration in the Lower Jurassic tight sand reservoirs of Dibei gas field, Kuqa Depression, western China

doi:10.1016/j.jngse.2017.12.004

	Effects of early oil emplacement on reservoir quality and gas migration in the Lower Jurassic tight sand reservoirs of Dibei gas field, Kuqa Depression, western China
	Shi, Hui 1; Luo, Xiaorong 1; Lei, Ganglin 2; Wei, Hongxing 2; Zhang, Liqiang 3; Zhang, Likuan 1; Lei, Yuhong 1
刊名	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
	2018-02-01
卷号	50 页码:250-258
关键词	Tight sand gas Early oil emplacement Sweet spots Hydrocarbon migration Lower jurassic Kuqa depression
ISSN号	1875-5100
DOI	10.1016/j.jngse.2017.12.004
文献子类	Article
英文摘要	It is common for many tight gas sandstone reservoirs to have experienced an early oil charge before gas invading. To determine the effects of early oil emplacement on reservoir quality and gas migration has important role in predicting "sweet spots" of gas production in tight sand reservoirs. We investigated the palaeo and current fluids contacts accurately due to parameters from quantitative grain fluorescence in the Lower Jurassic Ahe Formation of Dibei gas field. The porosity and permeability values in palaeo-oil leg are totally higher than in palaeo-water leg, especially there being a wide gap of permeability with an order of magnitude. The variation of reservoir quality derives from the early oil emplacement, which restrained clay conversions from kaolinite or illite-smectite mixed-layer into fibrous illite that dramatically increasing flow-path tortuosity in sandstones, according to core analysis and X-ray diffraction. The early oil preserved penetrating quality of palaeo-oil leg, but the sandstones that never experienced early oil emplacement contains much more fibrous illite. It made most of early oil pathways subsequently act as the migration pathways for late gas and less than 50% of the migration pathways for gas were caused by microfractures due to quantitative grain fluorescence. Only the sandstones with medium early oil saturation did become sweet spots for gas in the tight sand reservoirs. Too much and too little oil once saturated in pores maybe adverse to the late gas migration and accumulation.
WOS关键词	TARIM BASIN ; NORTH-SEA ; QUARTZ-CEMENTATION ; STATFJORD FORMATION ; SANDSTONES ; DIAGENESIS ; GEOCHEMISTRY ; ACCUMULATION ; PREDICTION ; POROSITY
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000426150600023
资助机构	Chinese National Natural Science Foundation(41702160) ; Chinese National Natural Science Foundation(41702160) ; CAS-CNPC Strategic Cooperation Project(RIPED-2015-JS-272) ; CAS-CNPC Strategic Cooperation Project(RIPED-2015-JS-272) ; Chinese National Natural Science Foundation(41702160) ; Chinese National Natural Science Foundation(41702160) ; CAS-CNPC Strategic Cooperation Project(RIPED-2015-JS-272) ; CAS-CNPC Strategic Cooperation Project(RIPED-2015-JS-272) ; Chinese National Natural Science Foundation(41702160) ; Chinese National Natural Science Foundation(41702160) ; CAS-CNPC Strategic Cooperation Project(RIPED-2015-JS-272) ; CAS-CNPC Strategic Cooperation Project(RIPED-2015-JS-272) ; Chinese National Natural Science Foundation(41702160) ; Chinese National Natural Science Foundation(41702160) ; CAS-CNPC Strategic Cooperation Project(RIPED-2015-JS-272) ; CAS-CNPC Strategic Cooperation Project(RIPED-2015-JS-272)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82710]
专题	中国科学院地质与地球物理研究所
通讯作者	Shi, Hui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.PetroChina Tarim Oilfield Co, Res Inst Petr Explorat & Dev, Korla 841000, Peoples R China 3.China Univ Petr, Sch Geosci, Qingdao 266555, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Shi, Hui,Luo, Xiaorong,Lei, Ganglin,et al. Effects of early oil emplacement on reservoir quality and gas migration in the Lower Jurassic tight sand reservoirs of Dibei gas field, Kuqa Depression, western China[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2018,50:250-258.
APA	Shi, Hui.,Luo, Xiaorong.,Lei, Ganglin.,Wei, Hongxing.,Zhang, Liqiang.,...&Lei, Yuhong.(2018).Effects of early oil emplacement on reservoir quality and gas migration in the Lower Jurassic tight sand reservoirs of Dibei gas field, Kuqa Depression, western China.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,50,250-258.
MLA	Shi, Hui,et al."Effects of early oil emplacement on reservoir quality and gas migration in the Lower Jurassic tight sand reservoirs of Dibei gas field, Kuqa Depression, western China".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 50(2018):250-258.