Stratigraphy and reservoir quality of the turbidite deposits, western sag, Bohai bay, China PR

doi:10.1016/j.jafrearsci.2014.05.010

	Stratigraphy and reservoir quality of the turbidite deposits, western sag, Bohai bay, China PR
	Rotimi, Oluwatosin J.1,2; Ako, Bankole D.3; Wang Zhenli 2
刊名	JOURNAL OF AFRICAN EARTH SCIENCES
	2014-11-01
卷号	99 页码:517-528
关键词	Modeling Turbidites Stratigraphy Electrofacies Alluvial fan Hydrocarbon
ISSN号	1464-343X
DOI	10.1016/j.jafrearsci.2014.05.010
文献子类	Article
英文摘要	Stratigraphic and subtle reservoirs such as pinchouts, sand lenses and unconformities have been discovered in Bohai basin. These reservoirs occur in sub-basins and sag structures called depressions. A prolific depression is the Liaohe depression that has been filled with rapidly changing mixed alluvial fan deposit of the Cenozoic age. Attempts made at recovering residual hydrocarbon from the subtle reservoir have necessitated the re-evaluation of available data to characterize and model the prolific Shahejie Formation turbidite deposit occurring as pinchouts and sand lenses for hydrocarbon assessment, reservoir quality and possible recovery through enhanced methods. Methods employed covered well logs analysis, clustering analysis for electrofacies and fuzzy logic analysis to predict missing log sections. Stratigraphic and structural analysis was done on SEGY 3D seismic volume after seismic to well tie. Stochastic simulation was done on both discrete and continuous upscaled data. This made it possible to correctly locate and laterally track identified reservoir formation on seismic data. Petrophysical parameters such as porosity and permeability were modeled with result of clustering analysis. Result shows that electrofacies converged on 2 rock classes. The area is characterized by the presence of interbeded sand-shale blanket formations serving as reservoir and seal bodies. The reservoir quality of the formations as seen on the petrophysical analysis done is replicated in simulation volume results. Reservoir rocks have porosity between 0.1 and 0.25, permeability between I and 2mD and hydrocarbon saturation as high as 89%. Lithofacies are observed to be laterally inconsistent, sub-parallel to dipping and occurring as porous and permeable continuous beds or pinchouts hosting hydrocarbon. The stochastic stratigraphic model depicts rock units in associations that are synsedimentary. The prevalent configuration gotten from the model gave an insight into exploring and developing the field for enhanced oil recovery of the heavy hydrocarbon of this area. (C) 2014 Elsevier Ltd. All rights reserved.
WOS关键词	BASIN ; DELTA
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000344429500021
资助机构	IGGCAS ; IGGCAS ; CASTEP ; CASTEP ; IGGCAS ; IGGCAS ; CASTEP ; CASTEP ; IGGCAS ; IGGCAS ; CASTEP ; CASTEP ; IGGCAS ; IGGCAS ; CASTEP ; CASTEP
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84884]
专题	中国科学院地质与地球物理研究所
通讯作者	Rotimi, Oluwatosin J.
作者单位	1.Covenant Univ, Dept Petr Engn, Ota, Nigeria 2.Chinese Acad Sci, Key Lab Petr Resources, Inst Geol & Geophys, Beijing, Peoples R China 3.Fed Univ Technol Akure, Dept Appl Geophys, Akure, Ondo State, Nigeria
推荐引用方式 GB/T 7714	Rotimi, Oluwatosin J.,Ako, Bankole D.,Wang Zhenli. Stratigraphy and reservoir quality of the turbidite deposits, western sag, Bohai bay, China PR[J]. JOURNAL OF AFRICAN EARTH SCIENCES,2014,99:517-528.
APA	Rotimi, Oluwatosin J.,Ako, Bankole D.,&Wang Zhenli.(2014).Stratigraphy and reservoir quality of the turbidite deposits, western sag, Bohai bay, China PR.JOURNAL OF AFRICAN EARTH SCIENCES,99,517-528.
MLA	Rotimi, Oluwatosin J.,et al."Stratigraphy and reservoir quality of the turbidite deposits, western sag, Bohai bay, China PR".JOURNAL OF AFRICAN EARTH SCIENCES 99(2014):517-528.