摘要
为理清庙西北洼烃源岩特征,进一步明确其生烃潜力,在前人研究的基础之上,深度挖掘现有资料,利用地球化学分析和盆地模拟手段对庙西北洼烃源岩特征进行了详细研究,结果显示:庙西北洼目前沉积了东二段、东三段和沙一段3套烃源岩,整体都属于弱氧化-弱还原环境形成的II干酪根;东二段有机质丰度为中等,虽沉积厚度最大,中心位置已经超过700 m,但绝大部分未进入生烃门限,东三段和沙一段沉积厚度相对较小,最大值仅有500 m和350 m,但平均厚度都已超过50 m,且都已进入生烃门限,中心位置都处于生气阶段,是庙西北洼的主力供烃源岩。
In order to clarify- the characteristics of hydrocarbon source rocks in the north suhsag of Miaoxi sag and further clarify- their hydrocarbon generating potential, on the basis of previous studies and the deep analysis of available data, the characteristics of hydrocarbon source rocks in the suhsag were studied by means of geochemical analysis and basin simulation. The study shows that ： 1 ） There are three sets of source rocks in the suhsag, including the second member of Dongying formation, the third member of Dongying formation and the first member of Shahejie formation, and they belong to II kerogen formed under the environment of weak oxidation and weak reduction. 2） The organic matter abundance of hydrocarbon source rock in the second member of Dongying formation is medium. Although the maximum deposition thickness of the source rock is larger than 700 m,hut most of it has not reached the threshold of hydrocarbon generation. The deposition thickness of the source rocks in the third member of Dongying formation and the first member of Shahejie formation is relatively small, their maximum deposition thickness is 500 m and 350 m separately. But their average thickness is more than 50 m,they have entered the threshold of hydrocarbon generation,and are the main hydrocarbon-supplying source rocks of the suhsag.
作者
陈保柱
王飞龙
汤国民
周园园
姚佳
陈磊
CHEN Baozhu;WANG Feilong;TANG Guomin;ZHOU Yuanyuan;YAO Jia;CHEN Lei(Exploration Department,Tianjin Branch of CNOOC China Co. , Ltd. ,Tianjin 300459, Chin)
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2018年第3期7-15,共9页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家科技重大专项"渤海辽东湾地区潜在富烃凹陷成藏研究与有利勘探方向预测"(2016ZX05024-002-006)
关键词
烃源岩特征
庙西北洼
渤海海域
盆地模拟
characteristics of source rock
north suhsag of Miaoxi sag
Bohai sea area
basin simulation
