Design And Implementation Of An Acoustic Electromagnetic Composite Behind-casing Reservoir Monitoring Probe

With the continuous development of oil fields,most of the fields have entered the high water content period of exploration and development,and the differences between the formations continue to increase,and the non-homogeneity of the behind-casing reservoir is serious.In order to have a better understanding of the behind-casing reservoir situation,the use of transient electromagnetic method and acoustic method to measure the reservoir resistivity,acoustic echo and radial interface information,in order to correctly evaluate the reservoir properties and improve oil and gas recovery rate provides an important basis.Based on the principle of transient electromagnetic reservoir monitoring and acoustic reservoir monitoring,this dissertation analyzes the feasibility of acoustic electromagnetic composite reservoir monitoring,establishes acoustic electromagnetic composite behind-casing reservoir monitoring model,and proposes a composite reservoir monitoring method.By analyzing the advantages and disadvantages of electromagnetic and acoustic logging probes and instrument mechanical structures,the acoustic-electromagnetic composite behind-casing reservoir monitoring probe mechanical structure was designed and implemented.On this basis,the composite probe downhole monitoring circuit system is optimally designed,mainly including acoustic and electromagnetic transmitting circuits,data reception circuits and power supply circuits and other modules.In addition,a composite reservoir monitoring interpretation method is proposed based on the acoustic electromagnetic composite probe monitoring system.And the corresponding downhole and surface computer control software is designed,realize visual graphical output of data.Based on the design of acoustic electromagnetic composite behind-casing reservoir monitoring system,indoor circuit debugging,probe performance testing and field experiments were carried out.The probe circuit,transmission and temperature and pressure resistance of the composite behind-casing reservoir monitoring system were tested and verified.The experimental results validate the feasibility of the acoustic electromagnetic composite probe design,which interprets reservoir data using the advantage of multiple complementary parameters and provides an important technical reference for the online reservoir monitoring system behind oil and gas well casing.