基于遗传算法的CSAMT最小构造反演.DOCVIP

MACROBUTTON MTEditEquationSection2 SEQ MTEqn \r \h \* MERGEFORMAT SEQ MTSec \r 1 \h \* MERGEFORMAT SEQ MTChap \r 1 \h \* MERGEFORMAT 湘西页岩气探测中广域电磁法的应用研究 何继善 戴世坤 瓮晶波 李帝铨 中南大学 湖南省长沙市 410083 摘要：我国南方页岩气勘探开发潜力巨大，南方复杂的地形地质条件限制了地震野外施工，资料品质不高，解释工作难度大。本文将广域电磁法应用于湘西龙山地区的炭质页岩探测，揭示了炭质页岩由于其含碳量较高，相对上下地层显示为低阻，采用自主研发的“重磁电三维反演成像解释一体化系统”进行广域电磁法数据处理，获得地下电性体真实的电阻率特征，基本查明了龙山地区炭质泥页岩层位的电性分布规律与特征，填补了湖南省非常规油气研究领域的空白，丰富了新能源研究成果，为进一步推动湖南省页岩气勘探奠定基础。结果表明广域电磁法是获取炭质页岩分布范围和埋深的有效探测手段，对于页岩气勘探的下一步工作具有指导意义。通过本次工作形成了适用于湘西北地区页岩气勘探的广域电磁法数据处理方法，初步形成湖南省炭质页岩地球物理探测方法与体系，并为其他地区页岩气勘探起到借鉴作用，充实了我国页岩气理论研究体系。 关键词：页岩气；广域电磁法；电阻率；勘探 中图分类号：P631 文献标识码：A 文章编号: The Application of Wide-field Electromagnetic Method to Detect Shale Gas in western Hunan Abstract The reserve of shale gas is huge in the southern part of China，where the complicated topographic and geologic conditions limited seismic field procedure, and data quality is low, result in the interpretation is difficult. These conditions limited the used of seismic in south China shale gas exploration. The electromagnetic method will be able to adapt to this situation .Wide-field electromagnetic method was applied for HYPERLINK javascript:showjdsw(jd_t,j_) carbonaceous shale exploration in Hunan province. The carbonaceous shale shows as low resistivity because of its high carbon content. Our own developed 3-D gravity - magnetic - electromagnetic inversion – imaging - interpretation integration system was used. And we obtained underground resistivity characteristic, identification the electrical distribution pattern and characteristics of carbonaceous shale; enhance the research of unconventional oil and gas in Hunan Province. The results show that the wide-field electromagnetic method is the effective means of detection to obtain the distribution of carbonaceous shale; the work has guiding significance for shale gas exploration. Key words Shale gas; Wide field electromagnetic method; Resistivity; Exploration 作者简介：何继善（1934） 男 教授 中国工程院能源与矿业学部院士、主席团