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Play evaluation methods and their application in preliminary exploration
Author(s): 
Pages: 314-318,329
Year: Issue:  2
Journal: Oil & Gas Geology

Keyword:  evaluation modelstrategic value of resourcesprobability of discoveryplay evaluationpreliminary exploratory play;
Abstract: With the increasing of exploration maturity ,the focus of exploration target evaluation has gradually shifted from basins to plays and traps .As the major targets to hydrocarbon discovery ,preliminary exploratory plays are the main targets to achieve exploration benefit .However ,evaluation of preliminary exploration target is very challenging due to the low ex-ploration maturity and multiple evaluation parameters which are difficult to quantify .Based on the principles of explora-tion risk analysis ,this paper established the model of probability of hydrocarbon discovery-strategic value of resources for evaluation of preliminary exploratory plays , and provided relevant assessment parameters , assignment criteria , computa-tional formula and results classification methods ,making it possible to evaluate preliminary exploration target on an uni-fied platform.Five preliminary exploration plays in the Sichuan Basin ,such as Tongnanba,Exi-Yudong,Nanjiang,lower combination of southeast Sichuan and Zhixinchang-Longbaoliang ,are selected and evaluated with this model .
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