基于干酪根热模拟与族组分比例配分模型的烃源岩生油量计算方法  

A new method to calculate the oil-generation quantity from source rocks based on kerogen pyrolysis simulation experiments and proportional re-mixture of the organic group compositions

作　　者：郭利果[1,2] 田辉[1] 肖贤明[1] 刘德汉[2] 

机构地区：[1]中国科学院广州地球化学研究所,广东广州510640 [2]中国科学院研究生院,北京100039

出　　处：《油气地质与采收率》2010年第2期21-24,共4页Petroleum Geology and Recovery Efficiency

基　　金：中科院重要方向项目(KZCX2-YW-114);国家杰出青年基金项目(40625011)

摘　　要：应用逐步生烃方法,结合EasyRo%计算,对东营凹陷利津洼陷利562井沙三段1962.6m黑色泥岩处理得到的湖相I型干酪根进行了封闭恒温体系下的热模拟实验。通过对各阶段累积抽提物中各族组分的定量分析,对抽提物中有机族组分变化进行了描述,并指出抽提物不能代表储层中未经降解的原油;以利983井3195.9～3202.8m沙三段成熟原油为基准,将Ro为1.17%时累积抽提物中的族组分比例配分得到的可代表普通成熟原油的热模拟原油,经轻烃校正后得到了此阶段该烃源岩每减少1克有机碳最大可生成766.7mg原油。在此基础上,结合前人实验方法,提出了新的精确度较高、成本较低且可行性较强的烃源岩生油量计算新方法,并推导出实际计算公式。Combined with the calculation of Easy Ro%,the type Ⅰ kerogen,which is separated from the lacustrine black mudstone of the third member of the Shahejie formation from well L562 at a depth of 1962.6m in Dongying sag of Bohai Bay basin,was conducted slepwise isothermal pyrolysis in a confined system,and then the yields of the organic group compositions were quantified for each of the pyrolysis experiment.It showed that the extracts from the kerogen pyrolysis could not represent the non-degraded oils yiel-ded in the reservoirs.After the proportional re-mixture of the organic group compositions and the light hydrocarbon correction in the stage of Ro = 1.17%,766.7mg of simulated crude oils were obtained to the max when the TOC of the source rocks reduced by every 1g.Based on the results above and previous experiments,the authors proposed a new method of the calculation of the oil-generation quantity from source rocks with high precision,low cost,and strong feasibility,and then deduced the calculation for-mula.

关 键 词：干酪根 热模拟实验 族组分比例配分 烃源岩 生油量计算 

分 类 号：TE125.6[石油与天然气工程—油气勘探]