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Slope break belt and subtle hydrocarbon reservoirs-taking Erlian basin as an example.

Fei Baosheng, Wang Jianhong.  
According to origin mechanism slope break belt can be classified into three types of structural, sedimentary and erosional slope break belts. Structural slope break belt is subdivied into three sub-types of fault, fold and flexure slope break belts; Sedimentary slope break belt was easy to be formed at the edge of platform and bio-herm or formed under differential compaction or transferred from fault slope break belt. According to exploration examples in the Erlian basin, the relation between different types of slope break belts and subtle reservoirs forming was discussed. Slope break multiple hydrocarbon accumulation zones with 5000×104t reserves were found in the east slope of Wuliyasitai sag. Comprehensive research presents that slope break belt is the important exploration orientation in slope structural zone.
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