Abstract
There are plentiful oil and gas shows in the Eastern Tarim Basin, but this area is much less explored. Development of a hydrocarbon accumulation model could provide guidance for future exploration. With analysis of control of hydrocarbon accumulation by tectonic evolution as a main line, combined with researches on hydrocarbon source rocks, reservoirs, traps and cap rocks in drilled wells, the processes of hydrocarbon generation, migration and accumulation were studied comprehensively. Finally three patterns of hydrocarbon accumulation were established as follows: lower source-upper reservoir hydrocarbon accumulation model above the upper Ordovician, mixed source-fault transportation-common sealing hydrocarbon accumulation model of the Jurassic sandstone and self-generating-self-preserving hydrocarbon accumulation model of the lower Palaeozoic carbonatite.
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