摘要
基于电阻率响应特征的储层识别和饱和度估算是天然气水合物储层评价的关键技术之一,在天然气水合物的勘探开发中发挥重要作用。本文开展了沉积物内水合物生成的物理模拟实验,采用电阻率层析成像技术,实现了分散状水合物和块状水合物生长过程的可视化探测,研究了两种赋存形态水合物的电阻率响应特征。研究表明:分散状水合物的高值电阻率零散分布,块状水合物的高值电阻率聚集分布;沉积物内的游离气导致块状水合物的电阻率层析成像位置发生偏移;分散状水合物和块状水合物的电阻率响应特征差异明显,与分散状水合物相比,块状水合物电阻率随着水合物的生成升高较快。
Reservoir evaluation of gas hydrate based on electrical response,as a key mean to discriminate natural gas hydrate and estimate its resource potential,plays an important role in the exploration and development of natural gas hydrate.The physical simulation experiment for gas hydrate formation in sediments was carried out in this paper to detect the morphology of dispersed hydrate and massive hydrate based on electrical resistivity tomography during the formation of hydrate.The resistivity responses of the two gas hydrate morphology were carefully studied.The results show that the high resistivity of dispersed hydrate has a scattered distribution pattern whereas the high resistivity of massive hydrate distributed in a concentrated pattern.The free gas in sediments may cause the position deviation of massive hydrate.The resistivity response characteristics of dispersed hydrate and massive hydrate change largely.Compared to the dispersed hydrate,the resistivity of massive hydrate increases rapidly with the formation of hydrate.
作者
赵金环
刘昌岭
邹长春
陈强
孟庆国
刘洋
卜庆涛
ZHAO Jinhuan;LIU Changling;ZOU Changchun;CHEN Qiang;MENG Qingguo;LIU Yang;BU Qingtao(Key Laboratory of Gas Hydrate of Ministry of Natural Resources,Qingdao Institute of Marine Geology,Qingdao 266237,China;Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China;School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China)
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2021年第6期206-212,共7页
Marine Geology & Quaternary Geology
基金
国家天然气水合物127专项“天然气水合物储层模拟与测试技术”(DD20190221)
国家自然科学基金“裂隙充填型水合物声学响应机理研究”(41906067)
山东省自然科学基金“基于声学-CT联合探测的水合物分解及其声学响应机理研究”(ZR2019BD051)。
关键词
天然气水合物
电阻率层析成像
赋存形态
电阻率响应
natural gas hydrate
electrical resistivity tomography
morphology
resistivity response
