Development and Application of Experimental System for Horizontal Well Separate Layer Stimulation Technology

Abstract

In order to develop the key downhole tools of horizontal well technologies such as separate layer fracturing, separate layer acidizing, separate layer water injection, separate layer water shutoff and water control, a great deal of laboratory simulation experiments are needed to conduct. The explicit design and analysis of comprehensive simulation experimental system for horizontal well downhole tools can meet the requirement of simulation experiments, whose main function includes packers setting, pressure bearing, releasing, torque application and measurement, displacement measurement, tension pressure application and measurement, water pressure test, etc. The accessory monitoring software of the experimental system was designed as well. The function test of the experimental system can meet the requirement of the experiment. The tension and pressure system can provide a force of ± 350 kN; the water pump pressure system can reach 40 MPa; the torque of the drilling and milling motor can reach ± 3 kN m; the rotating speed can reach 170 r/min; the detection moving distance of the tension and pressure is from 0 to 2090 mm; and the corresponding moving speed is from 0.6 to 1.3 m/min. More than 200 times of different experiments have been completed after the experimental system put into production, which provides effective support for the research and development of downhole separate layer stimulation tools.