酒泉盆地营尔凹陷油—源地质分布关系  

Geologically distributing relation of crude oils and source rocks in Ying’er Sag,Jiuquan Basin

作　　者：唐海忠 赵建宇 高岗[2,3] 马国福 赵乐义 杨智明 胡丹丹 Tang Hai-zhong;Zhao Jian-yu;Gao Gang;Ma Guo-fu;Zhao Le-yi;Yang Zhi-ming;Hu Dan-dan(Research Institute of Exploration and Development,CNPC Yumen Oil Field Company,Jiuquan 735019,China;State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;School of Geoscience,China University of Petroleum,Beijing 102249,China;Qingxi Operation Zone,CNPC Yumen Oil Field Company,Yumen 735019,China)

机构地区：[1]中国石油玉门油田勘探开发研究院,甘肃酒泉735019 [2]油气资源与探测国家重点实验室(中国石油大学(北京)),北京102249 [3]中国石油大学(北京)地球科学学院,北京102249 [4]中国石油玉门油田青西采油厂,甘肃玉门735019

出　　处：《天然气地球科学》2019年第11期1590-1599,共10页Natural Gas Geoscience

基　　金：中石油股份公司重大科技专项(编号：2012E330);中国石油第四次油气资源评价资助项目(编号：2013E-050209)联合资助

摘　　要：在酒泉盆地营尔凹陷白垩系原油基本物性、地球化学特征分析的基础上,主要利用饱和烃中甾、萜烷生物标志化合物指纹特征将原油分为A、B、C和D 4种类型,并明确不同类型原油的空间分布特征及其与烃源岩之间的亲缘关系。A类原油主要分布于中沟组,属于自生自储的未成熟-低熟油。B类原油为下沟组上段自生自储的正常成熟原油。C类和D类原油成熟度高于前两类,其中C类原油来自赤金堡组烃源岩,主要分布于赤金堡组和下沟组下段;D类原油属于赤金堡组和下沟组下段烃源岩生成的原油的混合,主要分布在下沟组下段和中段。不同类型原油平面上分层叠置且靠近断裂沟通位置,原油整体在长沙岭构造带聚集成藏。已发现的不同类型原油的分布明显受烃源岩、古隆起与砂地比分布等因素的控制,总体具有自生自储、汇聚成藏特征,层控特征显著。Based on the physical properties and geochemistry characteristics of crude oil samples distributed in the Ying’er Sag,Jiuquan Basin,the crude oil samples are classified into four types of A,B,C and D according to the features of saturated fraction,sterane and terpane. The spatial distribution relationship between the different types of crude oil and source rocks was clarified. Type A crude oil is mainly distributed in the K1z Formation with immature to low-mature thermal evolution stage and is characterized by self-generation and self-accumulation. Type B crude oil,belonging to mature oil,is distributed in the K1g3 with characteristics of self-generation and self-accumulation. The maturity of Type C and Type D crude oils is higher than that of Type A and Type B. Type C is mainly generated from K1c source rock and distributed in K1c and K1g1 formations. Type D oil is mixed oil which is generated from K1g2 and K1g1 source rocks and is distributed in the K1g2 and the K1g1. The discovered oil layers are chiefly controlled by source rock,paleouplift and thickness ratio of sandstone to stratum with the strata bound features of self-generation and self-accumulation.

关 键 词：原油类型 油源对比 烃源岩 自生自储 营尔凹陷 

分 类 号：TE122[石油与天然气工程—油气勘探]