渤中A凝析气田潜山储层特征及其地球物理判识方法  

Buried Hill Reservoir Characteristics and Its Geophysical Identification Methods for Condensate Gas Field of Bozhong A

作　　者：赵鹏飞 刘朋 明君 崔云江 张婕茹 来又春 Zhao Pengfei;Liu Peng;Ming Jun;Cui Yunjiang;Zang Jieru;Lai Youchun(CNOOC Research Institute Co.,Ltd.,Beijing 100028,China;China National Offshore Oil Corporation China Limited,Tianjin Branch,Tianjin 300459,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《地球科学》2025年第2期504-520,共17页Earth Science

摘　　要：渤中A凝析气田为典型的大型太古代变质岩潜山气田,岩性主要为片麻岩、变质二长花岗岩、变质花岗闪长岩和碎裂二长花岗岩,储集空间以裂缝−孔隙和孔隙−裂缝的组合类型为主.纵向上潜山划分为半风化带和潜山内幕,半风化带普遍发育网状缝和粒内溶蚀孔,形成储集性能好的块状储集体,潜山内幕非均质性强,储集性能差于半风化带;裂缝是有效的储集空间又是良好的渗流通道,大断层附近裂缝相对富集.孔隙型储层的储集空间多为粒间孔和溶蚀孔,主要发育在潜山顶部或潜山内幕断层附近;半风化带储层物性及其溶蚀孔隙展布与断裂密切相关,古地貌高点和断裂系统发育耦合区是有利的储层发育区带;裂缝的密度和开度对气井无阻流量和产量有重要影响.Bozhong A condensate gas field is a typical large Archean metamorphic buried hill gas field.Its reservoir lithology is mainly composed of gneiss,metamorphic monzogranite,metamorphic granodiorite and cataclastic monzogranite.The reservoir space is dominated by fracture-pore and pore-fracture combination types.Vertically,the buried hill is divided into semi-weathered zone and buried hill interior.The semi-weathered zone is generally developed with network fractures and intragranular dissolution pores,forming a massive reservoir with good reservoir guality.The buried hill interior is highly heterogeneous,and the reservoir guality is worse than that of the semi-weathered zone;Fracture system are both effective reservoir space and good seepage channel.The fracture is relatively rich near the major fracture.The reservoir space of porous reservoirs is mainly intergranular pores and dissolution pores,which are mainly developed at the top of the buried hill or near the fault inside the buried hill;The physical properties of the reservoir and the distribution of its dissolution pores in the semi-weathered zone are closely related to the faults;The density and opening of the fractures have an important impact on the open flow and production of the gas well.

关 键 词：潜山凝析气田 裂缝网络系统 半风化带 裂缝识别 储层地震预测 气藏产能 石油地质 

分 类 号：P618.13[天文地球—矿床学]