溱潼凹陷红庄油田凝析油的油源及成藏期  

Source and Accumulation Time of Condensates in Hongzhuang Oilfield,Qintong Sag,North Jiangsu Basin

作　　者：杨永才[1] 陆黄生[2] 张枝焕[1] 方朝合[3] 刘军[4] 王月杰[5] 胡瑛[1] 

机构地区：[1]中国石油大学油气资源与探则国家重点实验室,北京102249 [2]南京大学地球科学系,江苏南京210093 [3]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [4]胜利油田地质科学研究院,山东东营257015 [5]中国海洋石油有限公司天津分公司技术部,天津塘沽300452

出　　处：《沉积学报》2008年第3期531-539,共9页Acta Sedimentologica Sinica

基　　金：国家自然科学基金项目(批准号:40172056)资助

摘　　要：根据原油和烃源岩中三芳甾烷及甲基三芳甾烷组成特征，结合稳定碳同位素值，分析了苏北盆地溱潼凹陷红庄油田古近系凝析油的油源特征。结果表明，红庄油田凝析油主要来源于溱潼凹陷深部烃源岩，而并非来自于古近系烃源岩。应用储层岩石流体包裹体测试技术，根据油气包裹体特征及盐水包裹体均一化温度，结合地层埋藏史，分析了红庄油田S245井戴一段砂岩储层流体成藏期次。研究表明，与烃类包裹体共生的盐水包裹体均一化温度分布范围主要介于80～110℃，油气充注时期为新近纪中新世晚期，开始充注的时间大约为6Ma。Based on the characteristics of triaromatic steranes, alkyl triaromatic steranes and stable carbon isotopes, the sources of the condensates were analyzed in Paleogene in Hongzhuang Oilfield in Qintong Sag, Northern Jiangsu Basin. It shows that the condensates have not genetic affinity with Paleogene source rocks and were mainly sourced from the deep sources rock in Hongzhuang Oilfield. Based on the characterizations of hydrocarbon inclusions and homogenization temperatures, combining with the strata burial history, the time of hydrocarbon accumulation were con- firmed in Ed1 reservoirs in Qintong Sag, North Jiangsu Basin. The result shows that cogenetic aqueous inclusions from quartz in sandstone in Well S245 show homogenization temperatures ranging from 80 to 110 ℃ and petroleum filling began Late Miocene, approximately 6 Ma ago.

关 键 词：三芳甾烷 稳定碳同位素 油-源对比 成藏期 溱潼凹陷 苏北盆地 

分 类 号：P593[天文地球—地球化学] TE122.1[天文地球—地质学]