渤海海域低成熟油的地球化学特征  

GEOCHEMISTRY OF IMMATURE OIL IN BOHAI SEA AREA

作　　者：李友川 黄正吉 

机构地区：[1]中海石油研究中心勘探研究院，河北高碑店074010

出　　处：《中国海上油气（地质）》2002年第5期322-327,共6页China Offshore Oil and Gas(Geology)

摘　　要：渤海海域存在半咸水-咸水环境成因和淡水-微咸水湖相成因的两种低成熟油.半咸水-咸水环境主要分布于辽东湾、渤中凹陷东北缘和沙南凹陷.淡水-微咸水成因的低成熟油主要分布于歧口凹陷及沙南凹陷西北缘.不同成因类型的低成熟油的原油物性、族组分组成及生物标志化合物组成与分布特征等存在差异.沙河街组一段烃源岩为半咸水-咸水环境成因低成熟油的主要贡献者,而淡水-微咸水湖相成因的低成熟油主要来源于沙河街组三段和东营组下段烃源岩.Immature oil in Bohai Sea area can be divided into two origin types, one derived from source rock deposited in brackish_saline environment, another from source rock deposited in fresh?brackish lake. The former immature oil mainly occurs in Liaodongwan, the northeastern Bozhong sag and Sha'nan sag, and the latter mainly in Qikou sag and the northwestern Sha'nan sag. The two types of immature oil are different in physical properties, group composition and their biomarkers, structure and distribution. Member 1 of Shahejie Formation is the major source rock for the immature oil of brackish_saline environment origin, and the immature oil of fresh?brackish lake origin comes mostly from souce rock of Member 3, Shahejie Formation and Lower Dongying Formation.

关 键 词：渤海海域 低成熟油 地球化学特征 成因类型 半咸水-咸水环境 淡水-微咸水湖相 

分 类 号：P618.130.2[天文地球—矿床学] T[天文地球—地质学]