Free Radicals in Organic Matter for Thermal History Reconstruction of Carbonate Succession  

作　　者：QIU Nansheng LI Huili JIN Zhijun and ZHU Yinkang 1 State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249 2 Basin and Reservoir Research Center,China University of Petroleum,Beijing 102249 3 Institute of Petroleum Exploration and Development,SINOPEC,Beijing 100083 

出　　处：《Acta Geologica Sinica(English Edition)》2007年第4期605-613,共9页地质学报（英文版）

基　　金：This work is funded by the National Natural Science Foundation of China （Grant 40472066）;the National Major Fundamental Research and Development Project （Nos. 2005CB422102 and 1999043302）.

摘　　要：Geothermometer is one of the most useful methods to reconstruct the thermal history of sedimentary basins. This paper introduces the application of free radicals concentration of organic matter as a thermal indicator in the thermal history reconstruction of carbonate succession, based on anhydrous thermal simulation results of type I and H1 kerogen. A series of free radicals data are obtained under thermal simulation of different heating temperatures and times, and quantitative modds between free radical concentration （Ng） of organic matter and time-temperature index （TTI） for types I and type H1 kerogen are also obtained. This Ng.TTI relation was used to model the Ordovician thermal gradients of Well TZ12 in the Tarim Basin. The modeling result is corresponding to the results obtained by apatite fission track data and published data. This new method of thermal history reconstruction will be benefit to the hydrocarbon generation and accumulation study and resource assessment of carbonate succession.Geothermometer is one of the most useful methods to reconstruct the thermal history of sedimentary basins. This paper introduces the application of free radicals concentration of organic matter as a thermal indicator in the thermal history reconstruction of carbonate succession, based on anhydrous thermal simulation results of type I and H1 kerogen. A series of free radicals data are obtained under thermal simulation of different heating temperatures and times, and quantitative modds between free radical concentration （Ng） of organic matter and time-temperature index （TTI） for types I and type H1 kerogen are also obtained. This Ng.TTI relation was used to model the Ordovician thermal gradients of Well TZ12 in the Tarim Basin. The modeling result is corresponding to the results obtained by apatite fission track data and published data. This new method of thermal history reconstruction will be benefit to the hydrocarbon generation and accumulation study and resource assessment of carbonate succession.

关 键 词：carbonate succession GEOTHERMOMETER free radicals of organic matter apatite fission track thermal history 

分 类 号：P593[天文地球—地球化学]