麦捷让气田古构造对油气成藏的控制作用

为明确麦捷让构造卡洛夫-牛津阶气藏的控藏因素、掌握油气富集规律，利用层拉平技术研究了麦捷让构造的形成与演化，明确了麦捷让古构造和现今构造的形成时期以及规模；通过研究油气的生成、运移与构造形成之间的时空匹配关系，解决了卡洛夫-牛津阶气藏控藏因素不清的问题。研究得出，现今构造对麦捷让气藏的形成影响小，古构造是影响气藏形成的主控因素，古构造的大小决定了气藏的储量规模和油气分布规律。通过控藏因素的研究，不仅明确了气藏类型，也探索和掌握了气田的高产富集规律，即在古构造高点或古构造的上斜坡，储层物性好、气井产量大，远离古构造高点或位于下斜坡，则储层物性差、气井产量低。

CONTROLLING EFFECT OF METEJAN PALEOSTRUCTURE ON THE FORMATION OF GAS RESERVOIR

In order to obtain the controlling factors of reservoirs and gas productive concentration rules,the formation and evolution of Metejan fracture are studied by layer flattening technique.From the study,the forming period and scale of Palaeostructure and Neotectonics are clarified.Through the study of the timespace relationship between gas generation,migration and formation,the main controlling factors of reservoirs are found.The research result shows that Neotectonics have little effection on the formation of gas reservoir,while Paleostructure have more effects on the formation of gas reservoir.The size of Paleostructure determines the reservoir scales and gas distribution.The research on controlling factors of reservoirs has clarified the gas reservoir type and highyield & enrichment rules.Wells located in super or upslope of Paleostructure have high level of production and better physical property.On the contrary,wells located in the bottom or downslope have a low level of production and poor physical property.