Development Technology Policy Research Of Changbei Gas Field

Gas is a nonrenewable resource, thus how to exploit gas field constantly and efficiently while maintaining maximum economic benefit is particularly concerned. Reasonable work schedule is one of key policies related to gas field economic benefit. For exploiting low-permeability gas field preferably, reasonable work schedule should be made according to respective characteristics of different gas field.In this paper, based on Changbei area of Yulin gas field, Changbei gas filed is considered as a typical lithologic trapped gas reservoir, and the main reservoir of which is Shan2, then physical property, fluid properties and temperature-pressure system of this gas reservoir are researched. In dynamic study, deliverability analysis, decline rule of production wells, deliverability estimation and well interference are carried out; controlled reserve of gas reservoir is calculated; gas wells are prorated preliminary according to dynamic analysis; moreover, using numerical simulation method, under two different formation characteristics of pressure sensitivity and pressure insensitivity, the development technologies of gas reservoir are respectively researched in different development modes of constant output and constant pressure.When the lowest bottomhole pressure is limited to4MPa, the use of the working system of fixed bottomhole pressure can achieve higher recovery ratio.