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期刊论文

碳同位素动力学模拟及其在天然气评价中的应用

李贤庆肖贤明田辉TANG Yong-chun方家虎周强

地学前缘(中国地质大学(北京);北京大学):2005,12(4):543~550,-0001,():

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摘要/描述

The modelling of carbon isotope kinetics of natural gas is a leading research direction in oil and gas geochemistry at home and abroad1 Combined with basin sedimentary burial and geothermal histories, the modelling of carbon isotope kinetics provides a new and effective means for evaluating the origin and accumulation history of natural gas pools1 In this paper, we briefly introduce the modelling of carbon isotope kinetics of natural gas formation and its applications to the assessment of natural gas maturity, the determination of gas source, the history of gas migration and accumulation, and the oil-gas ratio1 We show that this approach is of great value for those applications1 The carbon isotopic characteristics of natural gas are not only affected by gas source and maturity, but also are related to accumulation conditions and the geothermal gradient in a basin1 There are obvious differences in the characteristics of carbon isotope ratios between instantaneous gas and cumulative gas1 The kinetic model of carbon isotope fractionation may be different for different basins, which depends on gas source condition, accumulation history and sedimentary-tectonic history1 Since the origin of natural gas pools in the superposed basins of our country is very complicated, and because natural gas pools have features of multiphase and variable gas-sources, this paper may provide new thought s for the study and evaluation of natural gas1

版权说明:以下全部内容由李贤庆上传于   2009年06月27日 11时55分51秒,版权归本人所有。

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