Analysis and Optimization of Production Disturbance of Gas Well Measures in the Well-Site of the Large Well Group of Tight Gas Field

In the middle and late stage of tight gas field development, low producing capacity and throughput capacity, which leads to liquid loading in gas well. Therefore drainage gas should be taken, which is the critical problem whether gas field development is success or not. At the moment, with expanding of the drainage gas wells, its drainage gas effect declining gradually, so far as to stripped wells because of waterlogged. Wherefore, drainage gas affecting factors and its relative strategy research should be taken, in order to enhance drainage gas efficiency. The research has been conducted at one producting block in the Ease Ordos Basin, which including 600 gas wells, 70% of its gas well-site needs drainage gas. The block in the well-site of the large well group, where multi gas well and multi-series pipeline, which result in disturbance of gas well measures. It including disturbance between drainage gas and collecting process, and its corresponding optimizing strategy experiment. Well start-up under drainage gas would cause well interference, in other words it affects production status of adjacent well. Firstly, measures back pressure variation to the pipeline, under different startup pressure of drainage gas well-site, which were connected by multi-series pipeline. Secondly, measures bearer conditions of plunger during upward, and bearer conditions of liquid droplet which carried up by plunger when it reach land surface. Thirdly, analyses startup conditions of plunger-lift, and throughput capacity of gas flow. It obtains optimized control strategy of drainage gas & plunger-lift, in which the well-site of the large well group. It’s not only declines disturbance between gas collection process and drainage gas strategy, but also enhance manufacture efficiency. It increased 13 million m3 natural gas annually in total, and every single gas well for 2% in average, in the producting block, where the research conducted, which was a notable result. It has been found that, the applicable drainage gas opportunity and strategy in the well-site of the large well group, by means of the analysis and optimization. It has been found that, drainage gas efficiency of large well group were affected by which multi-series pipeline. It’s especially declines disturbance between high capacity wells to low producing wells in large well group, by means of centralized drainage gas strategy, that others wells were concerned about when it start-up, and optimized drainage gas strategy. It’s not only ensures higher flow potential and effective drainage gas strategy during gas collection process, but also enhance manufacture efficiency of large well group. The research were aimed at the default in theory of drainage gas & plunger-lift, during its application, meanwhile, the theory of drainage gas strategy optimization has been improved. It has been obtained that, the optimized applicable drainage gas opportunity and strategy in the well-site of the large well group. It has been obtained that, superior control mechanism judged by RTU in the well-site of the large well group, and cloud computing cooperate with edge computing control mechanism. It has been achieved that, interfusion or cooperation, of the cloud computing that based on single gas well optimization, and edge computing that based on the well-site of the large well group optimization. The research has been taken, not only promoted drainage gas strategy and manufacture efficiency, but also set an successful example to further exploitation of shale gas and coal-bed gas.