塔东地区古城4井和罗西1井油气成藏差异性分析

塔中Ⅰ号坡折带勘探获得发现后，普遍认为塔里木盆地奥陶系坡折带具有优越的油气成藏条件，有可能直接控制了油气藏的分布。在这一思想的指导下，以坡折带为目标进行了一系列的研究工作。根据古城和罗西2个坡折带2口井钻获的烃类、包裹体等方面的分析证明了塔东地区坡折带原始油气藏已经遭受了破坏，后期油气充注类型明显不同，而成藏的差异性主要由烃源灶热演化差异、构造与断裂演化特征造成。古城坡折带北段和罗西坡折带西部台地前缘斜坡可能是下一步有利的油气勘探方向。

Difference Analysis on Hydrocarbon Accumulations in Two Wells of Gucheng 4 and Luoxi 1 in the Eastern Tarim Basin

It is generally considered Ordovician break|slope of Tarim basin with advantage of hydrocarbon accumulation,may directly dominate the distribution of reservoirs after the exploration breakthrough of discovery of Tazhong Ⅰ break-slope.Therefore,we have a series of studies aiming at break-slope.Analyses of characteristics of hydrocarbons and inclusions from wells in Gucheng and Luoxi areas suggest that the original reservoirs in Tadong break-slope have been damaged and the type of late filling hydrocarbons is obvious different from that of original.The divergences of hydrocarbon accumulations in Gucheng and Luoxi are mainly caused by the differences of source kitchen thermal history,structural and fault evolutions of two areas.And the north part of Gucheng break slope zone and the plateau frontier slope of the west part of Luoxi break slope zone are possibly beneficial oil and gas exploration orientation.