Since the period of the Enghth Five-Year Plan,important breaktrough has been made forpetroleum exploration in westem China A number of high-yield large-and medium-sized oil and gas fieldswere discovered in basins such as Junggar,Tarim,Trupan-Hami and Shaanxi-Gansu-Ningxia etc, so weredone around seabeach area of Bohai bay.These achievements benifit by proper implementation of the strate-gies in China’s petroleuc industry “to maintain the production in the east and develop the resource in thewest ”as well as devoting major efforts to developing new and advanced technologiies on petroleum explo-ration.In oder to keep these situations continuously,it is necessary to strengthen exploration in the western areas during the period of the Ninth Five-Year Plan,along with making new prosecting in the easternarea,developing new and advanced exploration techniques,increasing esploratory investment of the westto reach30% of the total amount in Cina’s petroleum industry, and intensifying and improving manage-ment Since the period of the Enghth Five-Year Plan, important break has been made for for petroleum exploration in westem China A number of high-yield large-and medium-sized oil and gas fields found in basins such as Junggar, Tarim, Trupan-Hami and Shaanxi-Gansu-Ningxia etc, so weredone around seabeach area of ​​Bohai bay. The achievements benifit by proper implementation of the strate-gies in China’s petroleuc industry “to maintain the production in the east and develop the resource in thewest” as well as devoting major efforts to developing new and advanced technologiies on petroleum exploration- oder to keep these situations continuously, it is necessary to strengthen exploration in the western areas during the period of the Ninth Five-Year Plan, along with making new prosecting in the easternarea, developing new and advanced exploration techniques, increasing esploratory investment of the westto reach30% of the total amount in Cina’s petroleum industry, and intensifying and improving manage-ment