Investigation of pressure loss during the of gas-liquid flow in vertical pipes

Abstract

In the final stage of gas and gas condensate fields development there are complications that worsen the conditions of wells operation and reduce production opportunities. One is the accumulation of fluid in the well bore, which is due to lack of upward gas flow velocity is not brought to the surface. As is known, the bottom water flows into the well not only due of general rise of gas-water interface because of pressure drop in the gas reservoir portion, but local rise near the bottomhole of production well and formation of so-called water-cone. Features of technological operation modes of wells with water seepage require clarification calculation pressure drop all the way of gas motion: from the supply circuit to the bottomhole formation zone, then from the outer limit of the bottomhole formation zone to the outline of well, and then the motion in the amount of partially or completely illed with water bottom and inally, up from the shoe tubing to the mouth. To understand the processes of liquid recovery from wells, the ability to design the installation and material selection it is necessary to know the laws and parameters of movement of gas-liquid mixtures in the pipes.