Abstract:

Sulige gas field is characterized by complicated geological settings,poor physical property,low gas abundance,low individual well productivity,no natural deliverability without being fractured,rapid productivity decline,short period of stabilized production,low productivity and recovery ratio and low economic benefits.And there is no mature development technology available all over the world for the field like this one.According to this kind of situation,individual well classification criteria suitable for Sulige Gas Field is formed based on the characteristics of the gas well production history,production history and decline principle of different kind of gas well are analyzed synthetically by utilizing the technology of gas reservoir engineering,precise evaluation to the dynamic recoverable reserve is carried out with the method of pressure drop,production decline and cumulative production.And corresponding measures are proposed,such as flow restriction in the bottom hole to stabilize the production,reasonable allocation to improve the recoverable reserve and individual well management of batch production in the later stage toemploy the reserve of the peripheral zone.And all the measures above would provide theory basis and technology supports to the efficient and reasonable development of low permeability and high heterogeneity gas reservoir similar to Sulige Gas Field.

Key words: low permeability gas field, dynamic analysis, recoverable reserve, gas well production management, production decline, Sulige Gas Field