A novel AICD structure design and its performance analysis
WANG Xiaoqiu, WANG Zhiming, ZHAO Lin
1Petroleum Engineering College, China University of Petroleum-Beijing, Beijing 102249, China ；2 Post-Doctoral Research Station of Shengli Petroleum Administration Bureau, Dongying 57001, China
In long horizontal wells, bottom water breakthrough is usually encountered due to reservoir heterogeneity and anisotropy. Traditional inflow control device (ICD) structures have disadvantages such as possessing a permanent flow resist rate and being disabled when meeting water. The main application autonomous inflow control device (AICD) usually has a complex structure or narrow application ranges problems which limits its applicability. The paper raised an novel AICD structure design combining a continuous jet principle and water swelling rubber (WSR). Sensibilities testing and its structure advantages were studied based on numerical simulation and full-scale physical experiments. The result shows that the device has a simple structure which provides an outstanding anti-blocking property and is insensitive to viscosity or density. The structure has a wide application range and can maintain excellent performance in all production stages.
