Research on the Technology for Stable Production of Weathering Crust Carbonate Gas Reservoir of Jingbian Gas Field in China

摘要

Carbonate gas reservoir plays an important role in the development of natural gas industry and its output accounts for about 30% of total output in China. Jingbian gas reservoir is the first supergiant carbonate gas field in China. By the end of 2013, the cumulative gas production of Jingbian is 654.3x10~8m~3. That is to say Jingbian gas field has remained stable production of 50x10~8m~3 scale for more than 10 years(Jia Ailin, 2012). Because of the cutting action of different scale troughs to formation and no uniform corrosion process to reservoir, gas field shows strong heterogeneity. On the other hand, the structure amplitude of gas reservoir is low and formation water is not active. On the whole, Jingbian gas field is a weathering crust stratigraphic - lithological reservoir(Denis Lavoie, 2011). At present, gas reservoir has entered the later period of development. The gas reservoir stable production faces three problems. Firstly, the formation pressure is low in the middle and high yield region. Secondly, the producing degree of reserves is very unevenly distributed. Lastly, intermittent wells are increasing and the productivity of gas well is low. Aiming at these problems, the stable production technology series are formed. These techniques include fine gas reservoir description, infilling adjustment, horizontal well development, booster development and fine gas reservoir management. These techniques will provide strong support for the long-term stable production and efficient development of Jingbian gas field.