辽河盆地东部凹陷北段有效烃源岩分布及排烃特征  

Distribution and Hydrocarbon Expulsion Characteristics of Effective Source Rocks in the Northern Section of the Eastern Sag,Liaohe Basin

作　　者：宋兵 王波[1] 刘少治 陈希光 SONG Bing;WANG Bo;LIU Shaozhi;CHEN Xiguang(Hangzhou Branch,PetroChina Research Institute of Exploration and Development,Hangzhou,Zhejiang 310023,China)

机构地区：[1]中国石油勘探开发研究院杭州分院,浙江杭州310023

出　　处：《西安石油大学学报（自然科学版）》2021年第6期9-15,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项“大型岩性油气藏形成主控因素与有利区带评价”(2017ZX05001-002)。

摘　　要：为了明确辽河盆地东部凹陷北段有效烃源岩分布及其排烃特征,采用生烃潜力法厘定研究区有效烃源岩排烃门限和排烃模式,预测东营组、沙一、二段、沙三段3套有效烃源岩的展布特征,结合排烃率、排烃强度及地史分析,确定3套有效烃源岩的排烃特征。结果表明:研究区排烃门限深度为2300 m,排烃高峰埋深为3000 m,主排烃期和成藏高峰期为东营期;沙三段有效烃源岩基本覆盖全区,沙一、二段和东营组主要限于牛青洼陷;主排烃洼陷为牛青洼陷,总排烃量为10.14×10^(8) t,其中沙三段为9.63×10^(8) t,占总量的94.97%,为研究区主力烃源岩,沙一、二段和东营组分别只占4.54%和0.49%。In order to clarify the distribution and hydrocarbon expulsion characteristics of effective source rocks in the north section of the eastern sag of Liaohe basin,the hydrocarbon expulsion threshold and hydrocarbon expulsion model of effective source rocks in the study area are determined using the hydrocarbon generation potential method,and the distribution characteristics of three sets of effective source rocks in Ed,Es_(1+2) and Es_(3) are predicted.The hydrocarbon expulsion characteristics of three sets of effective source rocks are determined according to the analysis of hydrocarbon expulsion rate,hydrocarbon expulsion intensity and geological history.The results show that the threshold depth of hydrocarbon expulsion in the study area is 2300 m,the burial depth of hydrocarbon expulsion peak is 3000 m,and the main hydrocarbon expulsion period and hydrocarbon accumulation peak period are Dongying period;The effective source rocks of Es3 basically cover the whole area,and the effective source rocks of Es(1),Es_(2) and Ed are mainly limited to Niuqing subsag;The main hydrocarbon expulsion subsag is Niuqing subsag,with a total hydrocarbon expulsion of 10.14×10^(8) t,of which the hydrocarbon expulsion of Es_(3) is 9.63×10^(8) t,accounting for 94.97%of the total,which is the main source rock in the study area.The hydrocarbon expulsion of Es_(1+2) and Ed accounts for only 4.54%and 0.49%respectively.

关 键 词：有效烃源岩分布 排烃特征 排烃门限 生烃潜力法 东部凹陷北段 

分 类 号：TE122.2[石油与天然气工程—油气勘探]