牛38井烃源岩排烃门限的确定  

DETERMINING THE EXPELLING HYDROCARBON THRESHOLD OF SOURCE ROCK OF WELL NIU 38

作　　者：陈中红[1] 查明[1] 金强[1] 

机构地区：[1]中国石油大学

出　　处：《天然气工业》2005年第11期7-9,共3页Natural Gas Industry

基　　金：国家"十五"重点科技攻关项目"济阳坳陷下第三系沉积体系有效烃源岩分布与评价"(2001BA605A-09)成果。~~

摘　　要：对牛38井主力烃源岩段沙河街组三段进行了密集测试分析,以排烃潜力指数为研究参数,对牛38井沙三亚段排烃潜力指数剖面分布进行了分析。研究结果表明,牛38井沙三段开始形成规模排烃的临界饱和量为300mg/g,排烃的临界饱和度为8.56%(考虑误差,其值在2.5%～9.5%之间),在达到排烃高峰时,Ⅰ型、Ⅱ1型、Ⅱ2型及Ⅲ型有机质的HEA值分别为800mg/g、600mg/g、380mg/g、160mg/g,对应的HES值分别为64.42%、29.86%、13.1%、1.59%,Ⅲ型有机质不能达到排烃门限条件,基本为无效有机质。The member 3 of Shahejie Formation, main source rock section of Well Niu 38 is closely surveyed and analyzed to investigate the expelling hydrocarbon threshold of the source rock. Taking S_p/TOC as parameter, the S_p/TOC value profile distribution of Sha 3 sub-member of Well Niu 38 is analyzed. The result shows: the critical saturation quantity of grand expelling hydrocarbon of Sha 3 member of Well Niu 38 is 300 mg/g and the critical saturation of expelling hydrocarbon is 8.5% (considering error, it is 2.5%-9.5%); when reaching the peak of expelling hydrocarbon, the HEA values of organic matter of typeⅠ, typeⅡ_1, typeⅡ_2 and type Ⅲ respectively are 800 mg/g, 600 mg/g, 380 mg/g and 160mg/g and the corresponding HEA values respectively are 64.42%, 29.86%, 13.1% and 1.59%; the organic matter of type Ⅲ fails to reach the expelling hydrocarbon threshold, almost being invalid one.

关 键 词：烃源岩 排烃门限 临界饱和量 临界饱和度 东营凹陷 

分 类 号：P618.13[天文地球—矿床学]