有效源岩的精确厘定及其排烃量:以南堡凹陷为例  

Establishment of effective source rock and hydrocarbon expulsion quantity:Taking Nanpu sag for example

作　　者：范柏江[1,2] 董月霞[3] 庞雄奇[1,2] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]中国石油大学盆地与油藏研究中心,北京102249 [3]中国石油冀东油田公司,河北唐山063200

出　　处：《中南大学学报（自然科学版）》2012年第1期229-237,共9页Journal of Central South University:Science and Technology

基　　金：国家科技重大专项项目(2011ZX05006);国家重点基础研究发展计划("973"计划)项目(2006CB202300)

摘　　要：有效源岩是指已经进入排烃门限并且品质较好能够排出烃类的源岩。有效源岩的判别分为3步:第1步是对研究区的潜在源岩进行地质统计,确定其平面分布;第2步是利用排烃门限理论判别潜在源岩是否进入排烃门限,只有进入排烃门限后才可能排烃;第3步是对进入排烃门限的潜在源岩进行品质判别,剔除不能排烃的源岩。由此精确厘定有效源岩的分布。基于有效源岩的空间分布,采用生烃潜力法可以准确计算排烃量。对渤海湾盆地南堡凹陷的应用结果表明:对于沙三段、沙一段、东三段有效源岩而言,沙三段有效源岩的规模最大;三套有效源岩的排烃量分别为62.99×108 t,30.65×108 t和22.23×108 t。Effective source rock is the high quality sedimentary strata that have gone into the hydrocarbon expulsion threshold and have expelled hydrocarbon.The judging method for effective source rock can be classified into three steps.The first step is to statistic the potential source rock.The second step is to judge the source＇s hydrocarbon expulsion threshold by using the hydrocarbon expulsion threshold theory.The third step is to judge the source＇s hydrocarbon expulsion quality.Thus,the distribution of the effective source rock is obtained.Based on the distribution of effective source rock,the hydrocarbon expulsion quantity can be calculated by using the hydrocarbon generation method.The application to Nanpu Sag,Bohai Bay Basin shows that,Es3 formation is the primary effective source rock,and the hydrocarbon expulsion quantity of Es3,Es1 and Ed3 formations are 62.99×108 t,30.65×108 t and 22.23×108 t,respectively.

关 键 词：有效源岩 排烃量 判别与评价 

分 类 号：TE122.3[石油与天然气工程—油气勘探]