Abstract: Chad^’ s Block H and Niger^’ s Block A, Block T and Block B are the onshore blocks located in the western section of the Central- Western African Rift System. They are the largest risk exploration blocks CNPC have ever acquired overseas. Facing a series of challenges, such as low exploration degree, high geological risks, short contract period and complicated operational environment, CNPC located the main play and exploration zones and belts in the region on the basis of geological study and reserve assessment. Meanwhile, it also formulated the comprehensive strategic exploration plan for the whole western African region while focusing on economic performance to optimize the targets of exploration wells. CNPC also enriched and developed the theory on passive rift oil and gas accumulations, adopted the applicable and latest exploration technology, created the management pattern of exploration projects, and made the general deployment in the light of the overseas characteristics. With the productivity construction pushed ahead in harmony with exploration progress, CNPC has made remarkable achievements in oil and gas exploration and development in the region.