IGGCAS OpenIR  > 油气资源研究院重点实验室
Seismic sedimentologic study of facies and reservoir in middle Triassic Karamay Formation of the Mahu Sag, Junggar Basin, China
Xu, Zhaohui1; Hu, Suyun1; Wang, Lu1; Zhao, Wenzhi1; Cao, Zhenglin1; Wang, Ruiju1; Shi, Shuyuan1; Jiang, Lei2,3,4
2019-09-01
Source PublicationMARINE AND PETROLEUM GEOLOGY
ISSN0264-8172
Volume107Pages:222-236
AbstractThe 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/[s*m(2)]) is lower than the other two lithologies, which have similar AI values (9-14 x 10(6) kg/[s*m(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.
KeywordSeismic sedimentology Faces Reservoir Middle Triassic Karamay Formation Mahu Sag Junggar Basin
DOI10.1016/j.marpetgeo.2019.05.012
Funding OrganizationChina 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
WOS KeywordFLUVIAL CHANNEL BODIES ; FAN-DELTA SYSTEM ; CONGLOMERATE RESERVOIR ; SEQUENCE STRATIGRAPHY ; 90-DEGREES-PHASE WAVELETS ; INTERPRETIVE ADVANTAGES ; OUTCROP ANALOG ; ALLUVIAL-FAN ; SOUTH TEXAS ; OIL-FIELD
Language英语
Funding ProjectChina National Science and Technology Major Project[2016ZX05004] ; PetroChina project[UTA14-001294/15HT10500000010]
Funding OrganizationChina 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
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000484871100016
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93605
Collection油气资源研究院重点实验室
Corresponding AuthorXu, Zhaohui
Affiliation1.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
Recommended Citation
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.
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