Laser ablation in situ U-Pb dating and its application to diagenesis-porosity evolution of carbonate reservoirs

被引：0
|
作者：
Shen A. [1 ,2 ]
Hu A. [1 ,2 ]
Cheng T. [3 ,4 ]
Liang F. [1 ,2 ]
Pan W. [5 ]
Feng Y. [3 ]
Zhao J. [3 ]
机构：
[1] Key Laboratory of Carbonate reservoirs, CNPC, Xihu District, Hangzhou
[2] PetroChina Hangzhou Research Institute of Geology (HIPG), Xihu District, Hangzhou
[3] Radiogenic Isotope Facility, School of Earth and Environmental Sciences, The University of Queensland, Brisbane, 4072, QLD
[4] Beijing SHRIMP Center, Institute of Geology, Chinese Academy of Geological Sciences (CAGS), Haidian District, Beijing
[5] Research Institute of Exploration and Development, PetroChina Tarim Oilfield, Korla
来源：
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | 2019年 / 46卷 / 06期
关键词：
Carbonates; Diagenesis-porosity evolution; In-situ U-Pb dating; Laser ablation; Sichuan Basin; Sinian Dengying Formation;
D O I：
10.11698/PED.2019.06.05
中图分类号：
学科分类号：
摘要：
Through the development and calibration of a standard carbonate sample with an age of 209.8 Ma using a newly-developed Laser Ablation (LA) Multi-Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICP-MS) technique, we successfully overcome the difficulty in sampling and dating ultra-low U-Pb ancient marine carbonates, which was previously untenable by isotope dilution (ID) methods. We developed the LA-MC-ICP-MS in situ U-Pb dating technique for ancient marine carbonates for the study of diagenesis-porosity evolution history in Sinian Dengying Formation, Sichuan Basin. By systematically dating of dolomitic cements from vugs, matrix pores and fractures, we found that the burial and diagenetic process of dolomite reservoirs in Sinian Dengying Formation was characterized by progressive filling-up of primary pores and dissolution vugs formed by epigenic karstification. The filling of vugs happened in three stages, early Caledonian, late Hercynian-Indosinian and Yanshanian-Himalayan, while the filling of matrix pores mainly took place in early Caledonian. The unfilled residual vugs, pores and fractures constitute the main storage space in the reservoir. Based on the above knowledge, we established the diagenesis-porosity evolution history of the dolomite reservoir in Sinian Dengying Formation, Sichuan Basin. These findings are highly consistent with the tectonic-burial and basin thermal histories of the study area. Our study demonstrates the reliability of in situ U-Pb dating for providing an effective way for the investigation of diagenesis-porosity evolution history and evaluation of porosity in ancient marine carbonate reservoirs before hydrocarbon migration. © 2019, The Editorial Board of Petroleum Exploration and Development. All right reserved.
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页码：1062 / 1074
页数：12
相关论文
共 46 条
  • [1] Kerans C., Karst-controlled reservoir heterogeneity in Ellenburger Group carbonates of west Texas, AAPG Bulletin, 72, 10, pp. 1160-1183, (1988)
  • [2] Moore C.H., Carbonate Reservoirs-Porosity Evolution and Diagenesis in A Sequence Stratigraphic Framework, pp. 293-298, (2001)
  • [3] James N.P., Choquette P.W., Paleokars, (1988)
  • [4] Lucia F.J., Carbonate Reservoir Characterization, (1999)
  • [5] Choquette P.W., Pray L.C., Geologic nomenclature and classification of porosity in sedimentary carbonates, AAPG Bulletin, 54, 2, pp. 207-250, (1970)
  • [6] Lucia F.J., Major R.P., Porosity evolution through hypersaline reflux dolomitization, Sedimentary Geology, 21, pp. 325-341, (1994)
  • [7] Purser B.H., Aissaoui B.A., Nature, origins and evolution of porosity in dolomites, Sedimentary Geology, 21, pp. 283-308, (1994)
  • [8] Davis G.R., Smith J.L.B., Structurally controlled hydrothermal dolomite reservoir facies: An overview, AAPG Bulletin, 91, 9, pp. 1342-1344, (2007)
  • [9] Zhao W., Shen A., Qiao Z., Et al., A research on genetic types and distinguished characteristics of dolostone, and the origin of dolostone reservoirs, Petroleum Exploration and Development, 45, 6, pp. 1-13, (2018)
  • [10] Wang Z., Peng Z., Chen W., Et al., Dating by high-precision Thermal Ionization Mass Spectrometry (TIMS) to the Paleotemperature stalagmites from cave meaning, Chinese Science Bulletin, 44, 17, pp. 1878-1881, (1999)
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