Research Of Optimization Design Of Vortex Tool In Low Pressure And Low Production Gas Well

Low pressure and low production gas wells appear liquid loading when gas production below the critical carrying liquid flow, seriously affected the continuous and stable gas mining. Vortex drainage gas recovery technology is a new technology applied to low pressure and low production gas wells. This paper through the combination of theoretical research and experimental research optimizes design of vortex tool. The main contents are as follows:(1)Research the currently using conventional drainage gas recovery methods、domestic and foreign literature about vortex drainage gas recovery technology, collect low pressure and low production gas wells resources at each block of Changqing Oilfield, get condition parameters such as gas production rate and water content;(2)Through analyze the working principle of vortex tool, design vortex tool structures, study the gas-liquid two phase vortex drainage gas recovery mechanism、 calculate the total duration distance of tubular system after loaded the vortex tool;(3)Through Solid Edge software to establish the mathematical model of vortex tool, import GAMBIT meshing, use FLUENT software to numerical simulation of the tubing after load the vortex tool, get law of water fraction、law of axial velocity and spiral flow pattern;(4) With the method of orthogonal experiment, formulate a structure size factors orthogonal table about vortex tool, optimized design of vortex tool structure size parameters, obtain the best combination of structural sizes;(5) Through vortex drainage gas recovery laboratory experiments those are six groups preferred vortex tools of theoretical analysis, verify the consistency of theoretical analysis and laboratory experiments, ultimately optimize two groups vortex tool.