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This article discusses the effect of wellbore trajectory on the flow performance of a horizontal cased and perforated gas well. We used a coupled well-reservoir flow model, taking into account the nature of the flow, and local hydraulic resistances of the wellbore, and thus determined the pressure and mass flow distribution along the horizontal wellbore for several types of trajectories, including undulated and toe-up trajectories. The simulation results showed the effect of horizontal gas well trajectory type on its flow rate and the importance of considering pressure distribution to optimize well design.

This work purpose was to develop a method for determination of the effective viscosity of the granulated gel PPG for blocking anthropogenic fractures (auto-FHF fractures) which is applied at later stages of oil fields development. Using the laboratory fracture model the values of constants (apparent constant consistency and the apparent index of pseudoplasticity) for the equation of viscoelastic liquid were obtained. The same constants were used to derive the equation for pressure gradient along the anthropogenic fracture. The gel viscosity is calculated by the equation of gel movement along the fracture. This equation enables to predict the gel viscosity for each size of granulated gel fractions depending on the fracture width and the gel injection velocity.

The ultimate goal of this paper is to develop a method to to determine the pelletized gel pressure gradient, PPG, in fractures resulted from FHF applied at later stages of oil fields development. Using the laboratory fracture model the values of constants (apparent constant of consistency and apparent index of pseudoductility) for viscoplastic fluid equation were obtained. These constants were also used in the derived equation for pressure gradient along the induced fracture. The gel pressure gradient was calculated by the equation of gel movement along the fracture. This equation enables to calculate the pressure gradient for each size of pelletized gel granules depending on the fracture width and the gel injection rate.

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