Ternary geochemical-tracing system in natural gas accumulation  

作　　者：LIU WenHui1,2?, CHEN MengJin3, GUAN Ping4, ZHENG JianJing2, JIN Qiang5, LI Jian6, WANG WanChun2, HU GuoYi3, XIA YanQing2 & ZHANG DianWei2 1 Exploration & Production Research Institute, SINOPEC, Beijing 100083, China 2 Key Laboratory of Gas Geochemistry, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China 3 Research Institute of Petroleum Exploration & Production, PetroChina, Beijing 100083, China 4 School of Earth and Space Sciences, Peking University, Beijing 100871, China 5 China University of Petroleum (East China), Dongying 257062 ,China 6 Longfang Branch, Research Institute of Petroleum Exploration & Production, PetroChina, Longfang 065007, China 

出　　处：《Science China Earth Sciences》2007年第10期1494-1503,共10页中国科学（地球科学英文版）

基　　金：Research Project of the National Key Basic Research Development Program (973 Program) of China (Grant No. 2001CB209102)

摘　　要：The establishment of geochemical-tracing system of gas generation and accumulation is helpful to re-elucidating the gas migration and accumulation in time and space. To deduce the complex process of gas accumulation, a ternary geochemical-tracing system is set up, according to stable isotope inheritance of source rocks, kinetic fractionation of stable isotopes, time-accumulating effect of noble gas isotopes, mantle-derived volatile inheritance, and organic molecule inheritance of light hydrocarbons and thermally kinetic fractionation in their generation, in combination with the previous achievements of gas geochemistry and geochemical parameters of gas-source correlation. There are tight interactions for the geochemical parameters with much information about parent inheritance and special biomarkers, in which they are confirmed each other, reciprocally associated and preferentially used for the requirement so that we can use these geochemical parameters to effectively demonstrate the sources of natural gas, sedimentary environments and thermal evolution of source rocks, migration and accumulation of natural gas, and rearrangement of natural gas reservoirs. It is necessary for the ternary geochemical-tracing system to predict the formation of high efficient gas reservoir and their distribution in time and space.The establishment of geochemical-tracing system of gas generation and accumulation is helpful to re-elucidating the gas migration and accumulation in time and space. To deduce the complex process of gas accumulation, a ternary geochemical-tracing system is set up, according to stable isotope inheritance of source rocks, kinetic fractionation of stable isotopes, time-accumulating effect of noble gas isotopes, mantle-derived volatile inheritance, and organic molecule inheritance of light hydrocarbons and thermally kinetic fractionation in their generation, in combination with the previous achievements of gas geochemistry and geochemical parameters of gas-source correlation. There are tight interactions for the geochemical parameters with much information about parent inheritance and special biomarkers, in which they are confirmed each other, reciprocally associated and preferentially used for the requirement so that we can use these geochemical parameters to effectively demonstrate the sources of natural gas, sedimentary environments and thermal evolution of source rocks, migration and accumulation of natural gas, and rearrangement of natural gas reservoirs. It is necessary for the ternary geochemical-tracing system to predict the formation of high efficient gas reservoir and their distribution in time and space.

关 键 词：stable isotope  NOBLE gas  light hydrocarbon  TRACING system  sources of natural GAS 

分 类 号：P618.13[天文地球—矿床学]