塔中西北部良里塔格组碳酸盐岩储层类型及主控因素  

Types and main controlling factors of carbonate reservoir in the Lianglitage Formation,the northwest of central Tarim Basin

作　　者：尚凯[1] 曹自成[1] 云露[1] 吕海涛[1] 沙旭光[1] Shang Kai;Cao Zicheng;Yun Lu;Lü Haitao;Sha Xuguang(Research Institute of Exploration and Development,Northwest Oilfield Company,SINOPEC,Urumqi,Xinjiang,830011,China;Northwest Oilfield Company,SINOPEC,Urumqi,Xinjiang,830011,China)

机构地区：[1]中国石化西北油田分公司勘探开发研究院

出　　处：《油气地质与采收率》2017年第4期49-54,共6页Petroleum Geology and Recovery Efficiency

基　　金：中国石化科研项目“下古生界碳酸盐岩油气富集规律与区带评价”(P16091)

摘　　要：近年来，塔中西北部奥陶系油气勘探取得了丰富的成果，但是对良里塔格组碳酸盐岩储层类型及主控因素研究较为薄弱，严重制约了该区进一步的油气勘探开发。通过对岩心、岩石薄片、铸体薄片和测井资料的综合分析，结合岩石学和地球化学等化验分析数据可知，研究区良里塔格组碳酸盐岩储层储集空间以溶蚀孔洞和裂缝为主，主要发育裂缝型、孔洞型和裂缝—孔洞型3种类型储层。塔中西北部良里塔格组碳酸盐岩储层受控于多重因素的影响。沉积微相为储层的发育奠定了物质基础，其中台地边缘高能粒屑滩最为有利。礁滩体岩溶作用和构造破裂作用对优质储层的规模和分布起着重要的控制作用。综合分析表明，研究区西部目前勘探程度比较低的阿东区块台缘带以及台内断裂发育区是良里塔格组缝洞型储层发育的有利地区。There are many discoveries in Ordovician oil and gas development in the northwest of central Tarim Basin,but there are few studies on types and main controlling factors of Lianglitage reservoirs,which has seriously restricted the oil and gas exploration and development in recent years.Based on core observations,rock section and casting section analysis and logging data and combing with experimental data on petrology and geochemistry of the Lianglitage Formation,it is concluded that the reservoir space is dominated by cavities and fractures in this area.The reservoirs are mainly of fracture-cavity type,fracture type and cavity type.The carbonate reservoirs in the Lianglitage Formation are controlled by many factors.The sedimentary microfacies provide the material foundation for the development of the reservoir,among which high energy grain beach at the platform margin is the most advantageous place for hydrocarbon entrapment.The karstification and tectonic rupture of reef beach bodies play an important role in controlling the size and distribution of high quality reservoirs.Integrated analyses indicate that platform margin in A-Dong area,where the degree of exploration is low,and its inner fault zones are favorable for development of cavity-fracture in the Lianglitage Formation.

关 键 词：奥陶系 良里塔格组 碳酸盐岩 储层类型 主控因素 塔中西北部 

分 类 号：TE112.23[石油与天然气工程—油气勘探]