Origin and Spatial Distribution of Carbonate Cements in Yanchang Fm.(Triassic) Sandstones within the Lacustrine Center of Ordos Basin，NW China

YAO   Jing-Li, WANG  Qi, ZHANG  Rui, TANG  Jun, TIAN  Bing, LIAO  Peng

doi:10.11764/j.issn.1672-1926.2011.06.943

2011 , Vol. 22 >Issue 6: 943 - 950

DOI: https://doi.org/10.11764/j.issn.1672-1926.2011.06.943

Origin and Spatial Distribution of Carbonate Cements in Yanchang Fm.(Triassic) Sandstones within the Lacustrine Center of Ordos Basin，NW China

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1.Research Institute of Exploration and Development, Changqing Oilfield Company, PetroChina, Xi′an 710021, China;
2.Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy
of Sciences,Lanzhou 730000,China; 3.Liaoning University of Engineering and Technology, Fuxin 123000, China;
4.Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2011-08-23

Revised date: 2011-10-09

Online published: 2011-12-10

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Abstract

Through the multiple discipline methods of petrology,mineralogy and geochemistry,we try to elucidate the forming mechanism of carbonate cements at different phases,distribution and main controlling factor as well as reservoir effects in the Triassic Yanchang Fm.sandstones,which were deposited in the lacustrine center of Ordos basin,NW China.Three kinds of carbonate cements in these sandstones can be subdivided into early,middle and late phase according to their textural relation and composition.The early and late carbonate cements are dominant in the study area.The former is the product due to precipitation of ultrasaline lake water under normal temperature and pressure.The middle and late cements composed of ferrous calcites are closely related to water-rock interaction in the alkaline diagenetic fluid flow occurred at the A₂ period of late diagenetic stage.The carbon element in the early cements are dominantly sourced from the meteoric water or lacustrine carbonate layer,whereas the carbon incorporated into the middle and late cements may be mixed by organic carbon from decarboxylation.The dissolution of feldspathic grains provided the main calcium supply to the precipitation of middle and late cements.The spatial distribution shows that the early cements were dominant in the lacustrine facies mudstone with relatively heavy carbon isotopes,implying their inorganic origin.The middle and late cements with relatively lighter carbon isotopes in turbidite,sandy debris sand and delta frontier as well as delta plain sandstones would be formed within the alkaline diagenetic environment.The tendency of mixing of organic carbon in the carbonate cements at different phases indicates that the quantity of organic carbon would gradually enhance with increasing distance from the ancient lacustrine center.

Key words： Carbonate cements; Carbon source tracing; Formation mechanism; Yanchang Formation; Ordos basin.

Cite this article

YAO Jing-Li, WANG Qi, ZHANG Rui, TANG Jun, TIAN Bing, LIAO Peng . Origin and Spatial Distribution of Carbonate Cements in Yanchang Fm.(Triassic) Sandstones within the Lacustrine Center of Ordos Basin，NW China[J]. Natural Gas Geoscience, 2011 , 22(6) : 943 -950 . DOI: 10.11764/j.issn.1672-1926.2011.06.943

References

［1］Wang Qi,Zhuo Xizhun,Li Xiaoyan, et al.Carbon and oxygen isotopic composition of different phase carbonate cements in terrigenous siliciclastic reservoir and significance for their origin:A case study from sandstones of Yanchang Formation(Triassic),southwestern Ordos basin,China［J］.Chinese Journal of Geochemistry,2008,27:249-256.
［2］Chowdhury A H,Noble P A.Origin,distribution and significance of carbonate cements in the Albert Formation reservoir sandstones,New Brunswick,Canada［J］.Marine and Petroleum Geology,1996,13(7):837-846.
［3］Longstaffe F J.Stable isotope studies of diagenetic processes［C］// Kyser T K.Stable Isotope Geochemistry of Low Temperature Fluids (Short Course Notes).Mineralogical Association of Canada,1987:78-98.
［4］Klein J S,Mozley P,Campbell A, et al.Spatial distribution of carbon and oxygen isotopes in laterally extensive carbonate-cemented layers:Implications for mode of growth and subsurface identification［J］.Journal of Sedimentary Research,1999,69:184-191.
［5］Irwin H,Curtis C,Coleman M.Isotopic evidence for source of diagenetic carbonates formed during burial of organic-rich sediments［J］.Nature,1977,269:209-213.
［6］Stiller M,Rouinick J S,Shasha S.Extreme carbon isotope enrichments in evaporitic brines［J］.Nature,1985,316:34-435.
［7］Dutton S P,White C D,Willis B J, et al.Calcite cement distribution and its effect on fluid flow in a deltaic sandstone,Frontier Formation,Wyoming,USA［J］.AAPG Bulletin,2002,86:2007-2021.
［8］Boles J R,Ramsayer K.Diagenetic carbonate in Miocene sandstone reservoir,San Joaquin basin,California［J］.AAPG Bulletin,1987,71:1475-1487.
［9］Ye J R,Lu M D.Geohistory modeling of cratonic basins:A case study of the Ordos basin,NW China［J］.Journal of Petroleum Geology,1997,20(3):347-362.
［10］Lan Yefang,Huang Sijing.Influences of authigenic chlorite on pore structure in sandstone reservoir:A case study from upper Triassic Yanchang Formation in Ordos basin,China［J］.Geological Bulletin of China,2011,30（1）：134-140.［兰叶芳，黄思静.储层砂岩中自生绿泥石对孔隙结构的——来自鄂尔多斯盆地上三叠统延长组的研究结果
[J].地质通报,2010,30(1): 134-140.］
［11］Zheng Rongcai,Wang Changyong,Li Hong, et al.Provenance analysis of Chang6 oil-bearing formation of Baibao-Huachi region in Ordos basin［J］.Lithologic Reservoirs,2007,19(1):32-38.［郑荣才,王昌勇,李虹，等.鄂尔多斯盆地白豹—华池地区长6油层组物源区分析［J］.岩性油气藏,2007,19(1):32-38.］
［12］Li Xiangbo,Fu Jinhua,Chen Qilin, et al.The concept of sandy debris and its application in the Yanchang Fromation deep water sedimentation of the Ordos basin［J］.Advances in Earth Science,2011,26（3）：286-294.［李相博，付金华，陈启林，等.砂质碎屑流概念及其在鄂尔多斯盆地延长组深水沉积研究中的应用［J］.地球科学进展，2011,26（3）：286-294.］
［13］Liu Haonian,Deng Lili,Gong Yechao, et al.Carbonate cements from Xujiahe sandstone and its forming mechanism,west Sichuan depression［J］.Natural Gas Technology,2008,2(5):24-27.［刘昊年,邓丽丽,龚业超,等.川西坳陷须家河组砂岩中碳酸盐胶结物及形成机制［J］.天然气技术,2008,2(5):24-27.］ 
［14］Keith M L,Weber J N.Carbon and oxygen isotopic composition of selected limestones and fossils［J］.Geochimica et Cosmochimica Acta,1964,28(10/11):1786-1816.
［15］Kelts K,Talbot M R.Lacustrine carbonates as geochemical archives of environmental change and Biotic/Abiotic interactions［M］// Tilzer M M,Ser-ruya C. Ecological Structure and Function in Large Lakes.Madison:Wis.Science Tech.,1990:290-317.
［16］Irwin H,Curtis C,Coleman M.Isotopic evidence for source of diagenetic carbonates formed during burial of organic rich sediments［J］.Nature,1977,269(5625):209-212.［17］Zhao Hong,Dang Ben,Dang Yongchao, et al.Reservoir characteristics and controls on its properties of Yanchang Formation in Ansei oilfield［J］.Journal of Earth Sciences and Environment,2005,27(4):45-48.［赵虹，党犇，党永潮，等.安塞油田延长组储集层特征及物性影响因素分析［J］.地球科学与环境学报,2005,27(4):45-48.］
［18］Li Xufen,Liu Jianchao,Mi Naizhe, et al.Reservoir characteristics of Chang 2 oil interval in Zhongshanchuan area of Ordos basin［J］.Journal of Earth Sciences and Environment,2009,31(4):388-393.［李绪芬，刘建朝，米乃哲，等.鄂尔多斯盆地瓦窑堡油田中山川区长2油层组储层特征［J］.地球科学与环境学报,2009,31(4):388-393.］
［19］He Wenxiang,Yang Le,Ma Chaoya, et al.Effect of micropore structure parameter on seepage characteristics in ultra-low permeability reservoir:A case from Chang 6 reservoir of Ordos basin［J］.Natural Gas Geoscience,2011,22(3):477-481.［何文祥，杨乐，马超亚，等.特低渗透储层微观孔隙结构参数对渗流行为的影响——以鄂尔多斯盆地长6储层为例［J］.天然气地球科学，2011,22（3）：477-481.］
［20］Gao Gang,Han Yonglin,Fan Hongche, et al.Reservoir characteristics of Member 4+5 & 6 of Yanchang Formation from upper Triassic in Hujianshan area,Ordos basin and their relationship with oil accumulation［J］.Natural Gas Geoscience,2011,22(4):576-581.［高岗，韩永林，范泓澈，等.鄂尔多斯盆地胡尖山地区上三叠统延长组长4+5—长6段储层特征及其与石油运聚关系［J］.天然气地球科学，2011,22（4）：576-581.］

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