The dating and temperature measurement technologies for carbonate minerals and their application in hydrocarbon accumulation research in the paleouplift in central Sichuan Basin, SW China  

作　　者：SHEN Anjiang ZHAO Wenzhi HU Anping WANG Hui LIANG Feng WANG Yongsheng 

机构地区：[1]PetroChina Hangzhou Research Institute of Geology(HIPG),Hangzhou 310023,China [2]CNPC Key Laboratory of Carbonate Reservoirs,Hangzhou 310023,China [3]PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China

出　　处：《Petroleum Exploration and Development》2021年第3期555-568,共14页石油勘探与开发（英文版）

基　　金：Supported by the China National Science and Technology Major Project(2016ZX05004-002);Basic Research and Strategic Reserve Technology Research Fund of Institutes Directly Under CNPC(2018D-5008-03);PetroChina Science and Technology Project(2019D-5009-16)。

摘　　要：A new method for reconstructing the geological history of hydrocarbon accumulation is developed, which are constrained by U-Pb isotope age and clumped isotope((35)47) temperature of host minerals of hydrocarbon-bearing inclusions. For constraining the time and depth of hydrocarbon accumulation by the laser in-situ U-Pb isotope age and clumped isotope temperature, there are two key steps:(1) Investigating feature, abundance and distribution patterns of liquid and gaseous hydrocarbon inclusions with optical microscopes.(2) Dating laser in-situ U-Pb isotope age and measuring clumped isotope temperature of the host minerals of hydrocarbon inclusions. These technologies have been applied for studying the stages of hydrocarbon accumulation in the Sinian Dengying gas reservoir in the paleo-uplift of the central Sichuan Basin. By dating the U-Pb isotope age and measuring the temperature of clumped isotope((35)47) of the host minerals of hydrocarbon inclusions in dolomite, three stages of hydrocarbon accumulation were identified:(1) Late Silurian: the first stage of oil accumulation at(416±23) Ma.(2) Late Permian to Early Triassic: the second stage of oil accumulation between(248±27) Ma and(246.3±1.5) Ma.(3) Yanshan to Himalayan period: gas accumulation between(115±69) Ma and(41±10) Ma. The reconstructed hydrocarbon accumulation history of the Dengying gas reservoir in the paleo-uplift of the central Sichuan Basin is highly consistent with the tectonic-burial history, basin thermal history and hydrocarbon generation history, indicating that the new method is a reliable way for reconstructing the hydrocarbon accumulation history.

关 键 词：laser in-situ U-Pb isotope dating clumped isotope thermometry hydrocarbon inclusions carbonate mineral dating carbonate mineral temperature measurement host mineral hydrocarbon accumulation paleo-uplift in central Sichuan Basin Sinian Dengying Formation 

分 类 号：P618.13[天文地球—矿床学]