Evaluation and selection of potential exploration targets with limited capital support is an eternal theme for all the oil and gas explorers.Different exploration targets have to be dealt with in different stages of exploration

which means different evaluation methods and parameters.Based on a comparison of evaluation method both domestic and abroad

we proposed in this paper to quantitatively guide exploration with exploration extent index

and established several two-factor evaluation models(hydrocarbon accumulation conditions-resource strategic value model for blocks

hydrocarbon discovery probability-resource strategic value model for plays and hydrocarbon-bearing probability-resource strategic value model for traps)with intellectual property for different stages of exploration based on systematic analyses and parameters selection upon various exploration targets such as blocks

plays

traps and etc.The models are customized for oil and gas exploration in China and can be used to yield objective and quick evaluation and selection results for explorers and management staff.