多通道瞬变电磁法油气藏动态检测  

Reservoir dynamic detection based on multi-channel transient electromagnetic

作　　者：王显祥[1,2] 底青云[2] 邓居智[1] 

机构地区：[1]东华理工大学放射性地质与勘探技术国防重点学科实验室,江西南昌330013 [2]中国科学院地质与地球物理研究所中国科学院页岩气与地质工程重点实验室,北京100029

出　　处：《石油地球物理勘探》2016年第5期1021-1030,839,共10页Oil Geophysical Prospecting

基　　金：国家重大科研装备研制项目"深部资源探测核心装备研发"(ZDYZ2012-1)-05子项目"多通道大功率电法勘探仪"资助

摘　　要：油藏动态检测通过对油藏开采过程进行监测,建立动态油藏模型,从而优化开发方案,提高油气采收率。现有的油藏监测手段主要为地震方法,成本较高。试图从电磁法角度,探讨利用多通道瞬变电磁法对油气动态监测的优势。首先介绍了多通道瞬变电磁法的原理,即主要利用电偶极子源向地下发射伪随机序列,并在发射与接收端分别测量电流与电压变化,通过反褶积提取大地脉冲响应;其次分析了利用多通道瞬变电磁法油气藏探测的优势。研究表明多通道瞬变电磁法集合了电性源瞬变电磁法的特点,可以取得对高阻体的最佳探测效果,较适用于油气藏动态检测;最后以一个背斜油藏模型为例进行了数值模拟,研究结果表明多通道瞬变电磁法在合适偏移距下可以很好地圈定油气藏的边界,并揭示油气藏的变化。Seismic is mostly used approach to dynamic reservoir monitoring to build reservoir model, optimize development programs, and improve oil recovery, but it is very costly. We attempt here to explore reservoir detection using multi-channel transient electromagnetic method. First the principle of the multi-channel transient electromagnetic method is presented. Using electric source, this method generates pseudo-random sequence current to the earth, measures current at the transmitter and voltage at receiver respectively, and gets impulse response through deconvolution. Then the reservoir detection feasibility of the multi-channel transient electromagnetic method is analyzed. It shows that the multi-channel transient electromagnetic method is more suitable for oil and gas reservoir detection with the advantages for detecting resistive bodies. Finally, a numerical simulation of an anticline oil reservoir model shows the proposed method can delineate reservoir boundaries at much cheaper cost, and well reveal changes in the reservoir. © 2016, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.

关 键 词：多通道瞬变电磁法 油气藏 动态检测 

分 类 号：P631[天文地球—地质矿产勘探]