针对渗漏型目标的新型接触式激电法及应用  

Contact-type induced polarization and its application for detecting leakage

作　　者：李静和[1] 何展翔 杨俊 冉孟坤 LI Jinghe;HE Zhanxiang;YANG Jun;RAN Mengkun(College of Earth Sciences,Guilin University of Technology,Guilin,Guangxi 541004,China;Shenzhen Key Laboratory of Deep Sea Oil and Gas Exploration Technology,Institute of Frontier and Interdisciplinary Sciences,Shenzhen,Guangdong 518055,China;Southern University of Science and Technology,Shenzhen,Guangdong 518055,China;Guangxi Transportartion Science&Technology Group Co.,LTD,Nanning,Guangxi 530006,China)

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]南方科技大学深圳市深远海油气勘探技术重点实验室,广东深圳518055 [3]南方科技大学前沿与交叉科学研究院,广东深圳518055 [4]广西交科集团有限公司,广西南宁530006

出　　处：《石油地球物理勘探》2021年第3期659-669,I0016,共12页Oil Geophysical Prospecting

基　　金：国家自然科学基金项目“深地/深海探测中强电流激发下可控源电磁法激电效应机理研究及应用”(41874085);广西高等学校千名中青年骨干教师培育计划和广西隐伏金属矿产勘查重点实验室联合资助。

摘　　要：如何高效、高精度地探测目标区重金属污染、油气渗漏等渗漏型激发极化场源目标的空间分布,是一项极具挑战性的任务。为此,以重金属污染为例,开展接触式激发极化法渗漏型目标探测的应用研究。提出接触式供电、地面观测和接触式供电、直接观测两种观测系统,解决复杂施工环境条件的限制问题,同时提高了观测信号的强度和观测精度。在详细讨论接触式重金属污染探测的微观极化效应机理的基础上,构建了边缘渗漏带引起高极化率值的异常模式。引入发射光谱法测定污染样品化学元素含量及四极装置测定样品极化率,分析形成渗漏型目标激发极化场源接触式激发极化效应的物性基础及其探测应用前提。设计渗漏型激发极化场源初始状态、扩散状态两个物理模拟土槽试验,对比、分析观测结果与传统激发极化法观测数据,验证了接触式激发极化效应的存在及其在环境、资源探测领域的可行性。该方法可推广应用到储油库油气泄漏、原生油气藏渗漏以及其他重金属渗漏污染目标的探测。Heavy metal pollution and oil/gas leakage are major sources of pollution in mining areas and industrial sites.Such environmental pollution caused by heavy metal pollution and leakage seriously affects our life and national economy.How to develop a new monitoring technology for detecting wastewater with heavy metal and oil/gas leakage is a very challenging task if considering monitoring cost,efficiency and accuracy.This paper describes contact-type induced polarization and its application.Two kinds of observation systems(contact power supply and ground observation;contact power supply and direct observation)are proposed,which can reduce the limitations in a complex construction environment,and improve the strength and accuracy of observed signals.Then the mechanism of microscopic polarization effect of contact-type heavy metal pollution is discussed in details,the content of heavy metal elements in contaminated samples is determined by emission spectrometry,and the polarizability of the samples is determined by a dipole-dipole method.In the study,two physically simulated soil tank tests were designed for simulating the initial state and diffusion state of heavy metal pollution,and the results were compared with the traditional induced polarization method to verify the existence of the contact-type induced polarization effect of heavy metal contaminated soil and its feasibility in detecting oil/gas leakage.The results provide an effective reference to detecting heavy metal pollution,oil leakages from oil tanks and underground oil/gas reservoirs.

关 键 词：接触式激发极化 渗漏目标 极化机理 异常模式 物理模拟 

分 类 号：P631[天文地球—地质矿产勘探]