Research On Watering Discipline Of The Horizontal Wells In SeBei Gas Field

Using of horizontal wells after having the water situation .The study on the effluent dynamic and rule of Horizontal wells in Sebei gas reservoirs applied to the development of horizontal well technology to reduce the level of Horizontal wells to provide ideas and basis.First, the current gas field production performance of Horizontal wells in Sebei summary of research, come to the water gas field as a whole changes, which Sebei gas field and at the level of Sebei gas field wells on the 2nd common feature of production there is obvious decreasing, and the main factors decreasing the water, the more water wells, the greater the rate of production decline. The Tainan gas field has a different variation, most of the Horizontal wells low-flow, no changes of production decline, well above the water level does not necessarily lead to a decline in production. Second, determine the level of Horizontal wells in Sebei gas field, control measures to provide a reasonable basis for the development. Gas field gas main water sources include: working fluid backflow, water layer, interlayer water channeling water, cementing quality, water channeling water and water edge, the water layer can be divided into condensate water, raw water layer and the secondary layer of water. Analysis of various water sources in the production of water is combined with the gas accumulated in recent years, typically out of the water distribution and production targets wells contrast, we can see the current gas field is mainly horizontal layer of water means water. Comprehensive analysis, horizontal well water flood control measures proposed: First, the new horizontal well in line with gas saturation, the principles of effective target thick layer optimization, followed by the location of the horizontal well and the target location for a reasonable arrangement, and consider the well design. Well water level has been developed for a reasonable rate of gas production, water resorted to decrease the impact of mining effluent on the proposed drainage technology advice. Finally, the paper recommend the selection of horizontal well water column, foam, coiled tubing.