塔里木盆地哈拉哈塘地区超深碳酸盐岩缝洞型储集层特征与控制因素  

Characteristics and Controlling Factors of Fracture-Cavity Carbonate Reservoirs in the Halahatang Area,Tarim Basin

作　　者：孙崇浩[1] 朱光有[1,2] 郑多明[1] 赵宽志[1] 胡方杰[1] SUN Chong-hao ZHU Guang-you ZHENG Duo-ming ZHAO Kuan-zhi HU Fang-jie(Tarim Oilfield Company, Research Institute of Petroleum Exploration ＆ Development, PetroChina, Korla Xinjiang 841000 Research Institute of Petroleum Exploration ＆ Development, PetroChina, Beijing 100083)

机构地区：[1]中国石油塔里木油田勘探开发研究院,新疆库尔勒841000 [2]中国石油勘探开发研究院,北京100083

出　　处：《矿物岩石地球化学通报》2016年第5期1028-1036,共9页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家科技重大专项(2016ZX05004)

摘　　要：塔里木盆地哈拉哈塘地区大面积发育超深缝洞型碳酸盐岩储集层,埋深超过7000m仍发育大量优质储集层。岩心、薄片、钻井及成像测井资料综合分析表明,储集层发育的层位集中在奥陶系一间房组和鹰山组,储集空间主要以洞穴、孔洞、裂缝为主,地震响应特征主要是规模大、强反射或串珠群等地震相组成的集合体。储集层纵向发育具有明显的层位性,集中在不整合面之下100m的范围内,平面上具有明显的非均质性,主要沿断裂带分布。这套岩溶缝洞型储集层总体表现出受多种岩溶作用叠加改造的特征,最主要是受控于层间岩溶和中晚加里东期断裂两大因素,层间岩溶控制了储集层纵向发育的层位性,断裂裂缝作为岩溶通道控制了储集层横向展布规模及非均质性,之后晚加里东-海西期的油气充注、盆地的快速沉降,基本保持了早期储集层发育的形态。通过储集层主控因素的分析,建立了超深缝洞型碳酸盐岩的储集层发育模式,为该区井位部署和高效开发提供了指导。Ultra-deep fracture-cavity carbonate reservoirs are widely developed in the Halahatang area,Tarim Oildield.Al-though the burial depth is greater than 7000meters,a large number of high-quality reservoirs are still developed.Integrat-ed analyses on core,thin section,drilling and image log data indicate that these reservoirs are mainly developed in the Yi-jianfang and Yingshan Formations in Ordovician.In these reservoirs,space mainly occurs as caverns,vugs,and fractures. The seismic response of reservoirs is the aggregation of seismic facies consisting of large scale bright reflection or groups of bead-like seismic response.Reservoirs display obvious vertical stratification.Within 1 00meters below the unconformity, reservoir planar distribution is obviously heterogenous,i.e.,reservoir distribution patterns near fracture belts.These karsti-fied fracture-cavity reservoirs display characteristics of superimposed alteration by multiple types of karstification.The two most important factors controlling the alteration are interlayered karstification and middle-late Caledonian fracturing.Inter-layered karstification controlls the vertical stratification;fractures occur as passages of karstification and controll the scale and heterogeneity of reservoir horizontal distribution.Afterwards,the oil and gas filled the reservoir in late Caledonian-Hercynian.Also,there was a rapid subduction of basin.However,the early stage reservoir geometry is generally un-changed during these events.Through analyzing the main controlling factors of reservoirs,researchers set up the develop-ment pattern of ultra-deep fracture-cavity carbonate reservoirs,which provided guidance for well deployment and high effi-ciency development of drilling in the study area.

关 键 词：超深碳酸盐岩 缝洞型储集层 层间岩溶 断裂裂缝 哈拉哈塘 

分 类 号：P618.13[天文地球—矿床学]