井间瞬变电磁法在不同地层的响应特征研究

Research on response characteristics of inter-well transient electromagnetic method in different formations

当前,我国的石油开采已进入剩余油开发阶段,而剩余油一般都位于地层深处,勘探难度很大,为此需要在地层深处的井间进行石油勘探。瞬变电磁法很适合在大地深处对各种岩石矿物进行探测,结合在井下建立瞬变电磁的收发装置,会使得井下勘探更加准确、便捷。本次研究使用COMSOL软件建立地质模型和信号收发装置,来仿真模拟真实的井间勘探情况,并且分别仿真均匀地层、分层地层、有异常体地层等不同地质情况下的瞬变电磁响应特征,以分析对比不同的响应特征。

At present,China’s oil exploitation has entered the stage of residual oil development,and the residual oil is generally located in the deep strata,and it is very difficult to explore,so it is necessary to carry out oil exploration between wells deep in the formation.The transient electromagnetic method is very suitable for the detection of various rock minerals in the depths of the earth,and combined with the establishment of transient electromagnetic transceiver devices downhole,it will make underground exploration more accurate and convenient.In this study,the COMSOL software was used to establish a geological model and signal transceiver device to simulate the real well-to-well exploration situation,and the transient electromagnetic response characteristics under different geological conditions such as uniform strata,layered strata,and anomalous strata were simulated to analyze and compare different response characteristics.