The coast belt surrounding Bohai Bay of China contains a lot of continental oil and gas fields that extending to the sea. Hydrocarbon exploration and development in this region is very difficult due to the complexity of the earth surface environment. Within the region

petroleum geological condition is particularly favourable for the formation of oil and gas fields. There are well-developed source rocks

multiple reservoir series and types

wellmatched source-reservoir-cap rock assemblages

various kinds of oil and gas tarps and zonaldistributed structures. It is a complex body with multi-type of oil and gas pools that vertically superposed. In recent years

an overall exploration has been carried out by adopting the new technique of seismic exploration

boring and ocean engineering etc.

a great number of high production wells in Shengli

Dagang Liaohe and Jidong Oilfieds have been drilled and considerable oil and gas reserves have been found.