柴达木盆地苏探1井原油生物标志化合物特征和成藏分析  

Biomarker Characteristics and Oil Accumulation Period of Well Sutan 1 in the Tarim Basin

作　　者：孙敏卓[1] 张鹏[2] 周莉 刘海珍 李国艳 陈建州 谭和勇[4] 房嬛[1] 王国仓[1] 

机构地区：[1]甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室,甘肃兰州730000 [2]中国石油青海油田勘探开发研究院,甘肃敦煌736202 [3]青海省第四地质矿产勘查院,青海西宁810029 [4]河南省地质调查院,河南郑州450001

出　　处：《天然气地球科学》2015年第5期922-929,共8页Natural Gas Geoscience

基　　金：国家科技重大专项(编号:2011ZX05005-001);国家重点基础研究发展计划(编号:2012CB214801);国家自然科学基金(编号:41272207);中国科学院先导专项(编号:XDA05130402);甘肃省重点实验室专项(编号:1309RTSA041)联合资助

摘　　要：通过对苏探1井（2 536.5～2 697.0m）储层流体包裹体分析,结合该段原油的生物标志化合物特征,对其油藏的形成进行了研究。结果表明：苏探1井（2 536.5～2 697.0m）原油的演化程度较高;其母质类型主要为陆源高等植物,其中在埋藏深度为2 620.67m、3 640.57m和2 697m的原油中有过母质来源为水生生物的原油充注;形成于淡到微咸水的弱氧化到偏氧化环境。苏探1井（2 536.5～2 697.0m）储层至少发生过3期不同成熟度的原油充注,以及一期天然气充注;该段储层为2期成藏,第一期成藏时间为142Ma左右,第二期成藏时间为107Ma左右,为早白垩世晚期燕山运动的构造回返期。According to some geological and geochemical data of well Sutan 1 of depth from 2 536.5m to 2 697.0m,including the homogenization temperature of fluid inclusion and the geochemical characteristics of crude oil,the hydrocarbon accumulation history of the studied region was analyzed.The result shows that the crude oil has the properties of high evolution degree with well Sutan 1.The precursor type is mainly high terrestrial plants.Among them three crude oils from depth of 2 620.67 m,3 640.57 m and 2 697 m have been charged with crude oil with aquatic organism.And the crude oil has deposited in weak oxidizing to oxidizing environment with fresh to slight saline water,which is better for preservation and transformation of organics.The characteristics of fluid inclusion with well Sutan 1 show that there are at least three times of filling of oil and one time of filling of gas.And two periods of petroleum accumulation existed in the crude oil of well Sutan 1.The reservoir forming time of the first charge with oil is about 142 Ma.The reservoir forming time of the second charge with oil is about 107 Ma,which is tectonic inversion of the Yanshanian orogenic movement in Late-Early Cretaceous.

关 键 词：柴达木盆地 苏探1井 生物标志化合物 包裹体 

分 类 号：TE122.113[石油与天然气工程—油气勘探]