鄂尔多斯盆地红井子罗庞塬地区长9油层组油藏描述  

Reservoir description of Chang 9 oil set in Hongjingzi-Luopangyuan area,Ordos Basin

作　　者：刘犟 郑荣才[2] 侯长冰[3] 史建南[2] LIU Jiang ZHENG Rongcai HOU Changbing SHI Jiannan(Post-Doctoral Research Station, Southwest Petroleum Branch, SINOPEC, Chengdu 610041, China Chengdu University of Technology, Chengdu 610059, China The Fourth Section of Ultra-low Permeability Reservoir in Changqing Oilfield, Qingyang 745100, China)

机构地区：[1]中国石油化工股分有限公司西南油气分公司博士后科研工作站,四川成都610041 [2]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [3]中国石油天然气集团公司长庆油田超低渗透油藏第四项目部,甘肃庆阳745100

出　　处：《西北大学学报（自然科学版）》2017年第5期739-751,共13页Journal of Northwest University（Natural Science Edition）

基　　金：国家重大专项"大气田富集规律与勘探关键技术"基金资助项目(2016ZX05007)

摘　　要：红井子—罗庞塬地区是鄂尔多斯盆地长9油层组勘探开发的重要地区。通过对红井子—罗庞塬地区油藏分布特征、流体性质和油藏类型的分析,发现研究区具有长91油层出油点,含油面积远比长92油层富集,且在垂向上呈现出一定的串珠状叠置现象,侧向连通性较差,平面上各油藏主要呈现出孤立分散、小规模的分布形态,非均质性强,隐蔽性强,单井产量小,油气富集丰度不高的特点。油藏类型主要有构造型、岩性-构造复合型、构造-岩性复合型和岩性型4种。通过对油源贡献及油气充注特征的研究,发现油源发育区、储层发育区、输导叠置区、动力发育区、长8充注剩余区、构造汇聚区的叠合部位是红井子—罗庞塬地区油气富集成藏的有利区带。研究区油气成藏的主要模式为:长7段强超压优质烃源岩提供的轻质原油,在较大的源储压差动力条件下,在构造裂缝和叠置砂体的高效输导下,在储层未致密化之前,垂向串珠状近源运聚成藏。结合长8油层组的勘探成果得知,源于长7段的原油会先就近倒灌于长8油层组内(此时源储压差更大),之后较少剩余的原油再倒灌给长9油层组,且分布局限而隐蔽。研究后认为,油源、通道、压差是控制红井子—罗庞塬地区长9油层组油气成藏的主要因素;红井子地区长91油层组为勘探开发的主要有利区。Hong Jingzi and Luo Pangyuan area play an important role in Chang 9 reservoir exploration and development in Erdos. To find that the oil producing spots and oil-bearing area of Chang 91 oil set are of more than 92 oil set enrichment in Hongjingzi-Luopangyuan area through the analysis of reservoir distribution characteristics,fluid properties and reservoir types,and the vertical presents a beaded superimposed phenomenon,lateral connectivity is poor,each reservoir mainly presents the isolated distribution form of scattered,smallscale,strong heterogeneity,strong concealment,small single well production,the characteristics of the abundance of oil and gas enrichment is not high. Reservoir types are mainly structural,lithologic-structural compound,structural-lithologic compound,and lithologic these four kinds of types. Through the study of oil source contribution and the characteristics of hydrocarbon filling found that oil source development zone,reservoir,migration superposition region,dynamic development zone,8 filling the remaining area,tectonic convergence zone superimposed part is the Hongjingzi-Luo Pangyuan area of oil and gas enrichment zone into favorable reservoirs. The main mode of hydrocarbon accumulation in the study area is： the light crude oil provided by the strong overpressure and high-quality hydrocarbon source rocks of Chang 7 set under the force of large pressure differential of source and reservoir,bead-like and proximally accumulated in vertical through the structural fracture and superimposed sand bodies before the densification of the reservoir. Combined with Chang 8 oil set exploration achievements,it is known that the crude oil stems from Chang 7 set flew backward preferentially into the Chang 8 oil set nearby（ right now the source and reservoir pressure difference is much higher）,then the less residual flew backward into the Chang 9 oil set,and the distribution is limited and concealed. So that the hydrocarbon source,transportation channel and differential pressure are the control eleme

关 键 词：成藏模式 控制因素 延长组 鄂尔多斯盆地 

分 类 号：P618.13[天文地球—矿床学]