塔中西北部良里塔格组碳酸盐岩储层类型及主控因素

发布时间：2018-03-05 17:50

本文选题：奥陶系　切入点：良里塔格组　出处：《油气地质与采收率》2017年04期 　论文类型：期刊论文

【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。
[Abstract]:In recent years, rich achievements have been made in the exploration of Ordovician oil and gas in the northwest of Tarim Basin, but the study of carbonate reservoir types and main controlling factors of Lianglitag formation is relatively weak, which seriously restricts the further exploration and development of oil and gas in this area. The comprehensive analysis of thin rock, cast sheet and logging data, combined with petrology and geochemistry, shows that the carbonate reservoir space of Lianglitag formation in the study area is mainly composed of dissolved pores and fractures, and the fracture type is mainly developed. The carbonate reservoir of Lianglitag formation in northwestern Tarim Basin is controlled by multiple factors. Sedimentary microfacies have laid a material foundation for reservoir development. Among them, the high-energy gravid shoal on the edge of the platform is the most favorable. The karst process and the tectonic rupture of the reef beach play an important role in controlling the scale and distribution of the high quality reservoir. The comprehensive analysis shows that, In the western part of the study area, the platform margin zone of the Adong block and the fault development area within the platform are favorable areas for the development of the fracture-cavity reservoirs of the Lianglitag formation.
【作者单位】：中国石化西北油田分公司勘探开发研究院;中国石化西北油田分公司;
【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)
【分类号】：P618.13

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