Study of Compositions for Selective Water Isolation in Gas Wells

Abstract

A hydrophobic composition containing water repellents and highly volatile solvents is shown in this study to isolate water from the bottomhole formation zone of gas wells and reduce as much as possible the saturation of pore spaces with water. During injection, this composition shows selectivity and mostly penetrates water-saturated porous media. The study shows that the injection of such composition into porous media has a high water-insulating effect, reducing the water permeability of water-saturated porous media by 35 times with a degree of water isolation of 97%. Moreover, while injecting, it has selective action, mainly penetrating water-saturated media rather than gas-saturated media. As a result of injecting 0.91 to 0.99 pore volumes (pv) of the composition, the Qwater/Qgas ratio reaches 5.22 to 5.26, indicating high selectivity.

The Influence of Permeability Anisotropy on Reservoir Simulation Model Behaviour in Oil Fields

“…The Jurassic deposits are the main contributor to productivity. These deposits were formed by various sedimentation processes, including regression and transgression, resulting in a diverse distribution of reservoir properties [19][20][21][22].…”

The Influence of Emulsion Rheology on Centrifugal Pump-Pipeline Systems in Hydrocarbon Fields

“…Where μ o , α are the model parameters, the values of which are shown in Figure 3. According to Figure 3, the power model can …………… (10) Where Q w.opt is the pump flow corresponding to the maximum efficiency (efficiency factor) when working on water; ν is the kinematic viscosity of the liquid; D2, b2 are the outer diameter and width of the impeller blades given in [41][42][43][44] (Table 1).…”