Experimental Study on Combined Water Control Technology for High Temperature and High Pressure Deep Water Gas Reservoirs

Design and Numerical Simulation Study of a Novel AICD for Water Control and Gas Production in Gas Wells

“…Once the wellbore begins to load liquid, the formation back pressure will increase and high-yield gas formations that do not produce water will also be affected, facing the risk and threat of production reduction, which in turn will affect the gas production of the entire gas well. Therefore, in the research process of water control strategies, some scholars have proposed that for unwanted water, chemical and mechanical solutions can be used to avoid unwanted water production in the wellbore design phase, some scholars have proposed that delaying the water in the reservoir from entering the wellbore and controlling the water from entering the wellbore are the key to enhancing oil recovery. , Through annular flow isolation technical means such as external casing packers, swellable packers, the high-permeability section, and the low-permeability section are segmented to reduce the interaction between reservoirs, ,− Al-Khelaiwi and Davies proposed for the first time the use of advanced well completions (AWCs) in water-producing gas reservoirs. The key components of AWC include downhole flow control technology such as ICD, AICD, ICV, and annular flow isolation, which can manage the fluid flow into or out of the length of the wellbore in order to optimize the well performance .…”

“…5 In addition, the water in the gas reservoir will quickly coning along the fractures in the reservoir while separating the gas area of the reservoir, it will also migrate to the area that is not invaded by water to generate “water-sealed gas”, thus affecting the recoverable reserves and recovery degree of gas fields. 6 Sech et al 7 and Qi et al 8 found in the experimental research of water flooding gas reservoirs that the elastic production water of the gas well advances suddenly along the high-permeability formation, and the water in the low-permeability formation rises slowly; it shows that in the high-permeability zone, water is more likely to invade. From this, it can be judged that in the process of gas reservoir exploitation, strong reservoir heterogeneity, large interlayer differences, edge-bottom water coning, etc.…”