【摘要】 四川盆地的茅口组具有阳新统和志留系两套较好的生油层,是盆地的主要产气层之一。储集空间为孔、洞、缝,特别是东吴运动后产生的表生期古岩溶形成的溶蚀洞穴,在茅口组既多且大,在泸州古隆起区已于99口井中钻遇,钻遇率为9.94%,加上井中重复钻遇,钻遇率达11.35%。放空厚度一般在0.1～1.0m之间,最厚可达3.95m,并不受构造和地域限制,即使是向斜也有放空,勘探领域远较构造圈闭宽广。经开发证实,古岩溶气藏累计采气较好,连通裂缝气藏一般皆好,古岩溶形成的缝洞网络与连通裂缝形成的网络相互交织则最好,应加强地震反射资料的研究,以寻找这种网络系统。更多还原

【Abstract】 Maokou Formation is one of the major pay zones of Sichuan Basin, in which there are Yangxin Series and Silurian potential source rock. Cracks,pores, and caves are dominant reservoir space of the Formation. In particular, corrosion caves developed from surface Palaeokarst generated after DongwuMovement are widely distributed in the Formation. Now 99 wells have been drilled in Luzhou Paleouplift area, with the ratio drilled being 9.94% and evenreaching as high as 11.35% thanks to repeated borehole drilling. Without the limit of region and structure, venting thickness ranges from 0.1m to 1.0m, withthe maximum reaching 3.95m. Venting also exists in synclines, of which the exploration area is more extensive than that of structural traps. Developmentshows that it is better to cumulatively produce gas in Palaeokarst reservoirs which are well connected with fractured gas reservoirs. Networks consisting ofPalaeokarst pores and caves interweave with networks developed from the connection between Palaeokarst reservoirs and fractured gas reservoirs. The interweaving is the best. So research on seismic reflection data should be intensified to find out such types of network systems.更多还原