摘要
通过对昊起一城川地区奥陶系岩溶古地貌、马五，底面构造、储层物性以及试气效果对比分析，认为马五，气藏除了受现今构造控制外，主要是受储层物性控制。储层物性影响因素较多，主要受自身岩性控制外，还受到后期岩溶和构造运动的改造。在沟槽附近的岩溶高地貌区，储层改造程度较强，易形成一些溶蚀孔洞，而溶洞顶部垮塌可形成一些应力缝；另外，构造运动也可产生大量微裂缝，普遍发育的各种裂缝增加了该区储层的导流能力。
According to the comparative analysis of the Ordovician karsl palaeo-geomorphology, bottom structure of Ma55 reservoir, physical properties, and results of testing for gas in the Wuqi-Chegehuan area, it is considered that the MaSs gas resevoir is mainly controlled by the physical properties hesides the current strtwture of the reservoir. There are many faelors that influence the reservoir properties. These properties are mainly controlled by, their own lithology, hut also reformed by the post-karst and tectonic nmvement. In the high karst topography areas near the grooves, lhe reservoir is strungly stimulated and is easy to form some dissolution pores and/or holes, while collapse on the top tff the pores may form some stress t：raetures. In addition, the leelunie movement can also form a large number of miero-fissures. These extensively developed ti＇aetures increased the fracture conductivity of the reservoirs
关键词
岩溶古地貌
储层物性
溶蚀孔洞
微裂缝
karst palaeo-geomorphology
reservoir properties
dissolution cavities
micro-fracture
