Non-traditional hydrocarbon resources:New physical domains with great potential for petroleum exploration and development
Depending on whether traps(or reservoirs)are involved in current disciplines of petroleum geology,they can be divided into traditional and non-traditional types.Compared with traditional traps(or reservoirs),the non-traditional are featured by peculiar form,complex internal structure,strong heterogeneity,diverse source-reservoir-caprock assemblage,unique reservoir-forming mech-anisms,and subtle distribution.Even some of them are regarded as forbidden zones according to traditional geological theories.The discovered and developed non-traditional ones contain outcrop reservoirs,fault-karst reservoirs,fault-fracture reservoirs,and fault-crust reservoirs.And they are becoming hot spots and highlights in exploration and development.Their geological and reservoir-form-ing setting is extremely complex in China.Considerably numerous traps(or reservoirs)have not been incorporated into classic petro-leum geology yet.There exist abundant non-traditional hydrocarbon resources mostly in ultra-deep and deep strata or water,plateau,polar regions,special climate areas,and even outside basins,representing new domains appearing for exploration.
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