Seismic sedimentologic study of facies and reservoir in middle Triassic Karamay Formation of the Mahu Sag, Junggar Basin, China

doi:10.1016/j.marpetgeo.2019.05.012

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院油气资源研究重点实验室

	Seismic sedimentologic study of facies and reservoir in middle Triassic Karamay Formation of the Mahu Sag, Junggar Basin, China
	Xu, Zhaohui 1; Hu, Suyun 1; Wang, Lu 1; Zhao, Wenzhi 1; Cao, Zhenglin 1; Wang, Ruiju 1; Shi, Shuyuan 1; Jiang, Lei 2,3,4
刊名	MARINE AND PETROLEUM GEOLOGY
	2019-09-01
卷号	107 页码:222-236
关键词	Seismic sedimentology Faces Reservoir Middle Triassic Karamay Formation Mahu Sag Junggar Basin
ISSN号	0264-8172
DOI	10.1016/j.marpetgeo.2019.05.012
英文摘要	The top sandstone (S-1) of the middle Triassic Karamay Formation (T(2)k) is one of the major pay zones in the Mahu field, Junggar Basin, northwestern China. Both spatial distribution and internal architecture of the reservoirs are important for resource evaluation and petroleum production in the field. Seismic sedimentology, an integrated study of seismic geomorphology and seismic lithology, was applied to well and three-dimensional (3-D) seismic data to analyze distribution of sedimentary facies and reservoirs. Lithologies in the study area consist of conglomerate, sandstone, and mudstone. Acoustic impedance (AI) of mudstone (6-9 x 10(6) kg/[sm(2)]) is lower than the other two lithologies, which have similar AI values (9-14 x 10(6) kg/[sm(2)]). Therefore, seismic amplitude can distinguish mudstone from conglomerate and sandstone, but fails to differentiate conglomerate from sandstone. Seismic geomorphology was employed to qualitatively predict distribution of sandstone and conglomerate respectively using frequency decomposition, seismic-attribute extraction, and red-green-blue (RGB) color-blending techniques. In the seismic lithologic study, principal component analysis (PCA) was utilized to transfer multiple seismic attributes into principal components. Selected principal components were then fit with cumulative reservoir thickness interpreted from porosity-log data, resulting in quantitative estimation of interwell thin (10 m or thinner) reservoir distribution. Meandering fluvial facies were recognized for the first time in the previously interpreted fan-delta facies zone. Meandering channels formed when the lake level rose in relatively humid climate during a time with few tectonic activities. The previously formed fan-delta was substituted by a later formed meandering channel, which flowed into the southwestern lake from the north. Sediment distribution was controlled by accumulation space or paleogeomorphology restored by cast method; sediment is thick in paleolow terrains and thin in paleohigh areas. Locality of reservoir rock is basically coincident with sandstone distribution. Thick reservoir rocks with high porosity (greater than 10%) are located mainly in areas with moderately thick sandstones formed in point-bar subfacies of fluvial systems and in lower-fan subfacies of the fan-delta system. Higher petroleum production in individual wells drilled in the fluvial system indicates superior physical properties there. As a result, locating point-bar subfacies is key to improving hydrocarbon exploration and development.
资助项目	China National Science and Technology Major Project[2016ZX05004] ; PetroChina project[UTA14-001294/15HT10500000010]
WOS关键词	FLUVIAL CHANNEL BODIES ; FAN-DELTA SYSTEM ; CONGLOMERATE RESERVOIR ; SEQUENCE STRATIGRAPHY ; 90-DEGREES-PHASE WAVELETS ; INTERPRETIVE ADVANTAGES ; OUTCROP ANALOG ; ALLUVIAL-FAN ; SOUTH TEXAS ; OIL-FIELD
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000484871100016
资助机构	China National Science and Technology Major Project ; China National Science and Technology Major Project ; PetroChina project ; PetroChina project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; PetroChina project ; PetroChina project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; PetroChina project ; PetroChina project ; China National Science and Technology Major Project ; China National Science and Technology Major Project ; PetroChina project ; PetroChina project
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/93605]
专题	地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者	Xu, Zhaohui
作者单位	1.PetroChina, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 4.Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Explorat, Chengdu 610059, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Xu, Zhaohui,Hu, Suyun,Wang, Lu,et al. Seismic sedimentologic study of facies and reservoir in middle Triassic Karamay Formation of the Mahu Sag, Junggar Basin, China[J]. MARINE AND PETROLEUM GEOLOGY,2019,107:222-236.
APA	Xu, Zhaohui.,Hu, Suyun.,Wang, Lu.,Zhao, Wenzhi.,Cao, Zhenglin.,...&Jiang, Lei.(2019).Seismic sedimentologic study of facies and reservoir in middle Triassic Karamay Formation of the Mahu Sag, Junggar Basin, China.MARINE AND PETROLEUM GEOLOGY,107,222-236.
MLA	Xu, Zhaohui,et al."Seismic sedimentologic study of facies and reservoir in middle Triassic Karamay Formation of the Mahu Sag, Junggar Basin, China".MARINE AND PETROLEUM GEOLOGY 107(2019):222-236.