Su Bridge Gas Field Drainage Gas Feasibility Study

Buried hill Su 1 gas reservoir was responsible for supplying gas for Beijing in winter. The gas productivity, no matter of single well, or of field, reached utmost value during the period of whole winter. Furthermore the recovery percent was improved in a large extent. The bottom water in gas reservoir was drastically active. The production of gas reservoir was difficult to be stable because of all above. In this condition the technical measure to produce gas by draining water is put forward in order to extend the stable production period and improve the production result for the gas reservoir. The production performance and profile are studied. The draining water types of gas wells are analyzed and gas productivity is evaluated. The geology reserves is determined by many kinds of methods. It is referred to the study of inflow and outflow performance of gas well, and well selection principle, adaptive condition and economic of seven advanced to produce gas by draining water technologies in and abroad. Incorporating the successful experience and lessons in development history for many kinds of gas reservoirs in and abroad, it is further studied to bottom water scale, movement regulation of bottom-water gas reservoir, whole production process, the effect mechanism for ultimate gas recovery. The suitable result is reached and easy for operation. The application of the result is significant for accelerating scientific and normalizing management of gas reservoir, extending stable production period, improving ultimate recovery of gas reservoir. The study can not only improve the economic benefit of the gas reservoir, but also can supply valuable experience for the development of similar gas reservoirs.