Classification and Recognition of Horizontal Wells in Tight Gas Reservoirs

Abstract

It is clear that the characteristics of water production and effusion in horizontal wells of tight gas reservoirs can predict the water production trend and regularity of horizontal wells in advance, and reduce the damage of produced water to gas well productivity. According to the law of gas production in horizontal wells of tight gas reservoirs, the dynamic and static factors affecting the production of tight gas are analyzed, and the parameters related to the characteristics of effusion are optimized. Combined with the cluster analysis method, the horizontal wells of tight gas reservoirs are divided into different categories. The dynamic parameter variation characteristics of the liquid well are conducive to correctly identifying the effusion law of the gas well. The results show that the characteristics of water-bearing effusion in horizontal wells of tight sandstone gas reservoirs are not only related to horizontal well types, but also dynamically change with production time; the same horizontal wells have different production capacities at different times and have different effluent characteristics and trends. The study suggests that the effusion phenomenon of horizontal wells in tight sandstone gas reservoirs is a comprehensive reflection of reservoir physical properties, gas seepage and fluid flow capacity in horizontal wellbore. A large number of production dynamic data can reflect the effusion characteristics of horizontal wells in tight gas reservoirs; The big data clustering analysis method can identify the different characteristics of horizontal well effusion, and has guiding significance for the treatment of horizontal well effusion in tight gas reservoirs.