CAJ | 학술논문

瞬变电磁法(TEM)是近年来国内外发展速度较快、应用效果较好的一种电磁方法,由于其施工便利、成本低廉、工作效率高、应用效果明显等优点,已广泛应用于金属、煤炭、地下水等矿藏勘查.该方法应用于地震勘探中的表层结构调查,虽不能直接得到近地表地质体岩性信息.但可通过连续观测获取不同岩性间电性差异信息,根据电性相对关系得到准确的近地表地质体形态和岩性分布规律,为地震资料后续处理提供可靠的静校正量.瞬变电磁法勘探深度由浅层5 m到中深层300 m左右.准噶尔盆地南缘东部台28井区勘探实例表明,通过电性分层、小折射和地震微测井成果资料综合解释,在表层结构建模和计算静校正量方面取得良好效果.
순변전자법(TEM)시근년래국내외발전속도교쾌、응용효과교호적일충전자방법,유우기시공편리、성본저렴、공작효솔고、응용효과명현등우점,이엄범응용우금속、매탄、지하수등광장감사.해방법응용우지진감탐중적표층결구조사,수불능직접득도근지표지질체암성신식.단가통과련속관측획취불동암성간전성차이신식,근거전성상대관계득도준학적근지표지질체형태화암성분포규률,위지진자료후속처리제공가고적정교정량.순변전자법감탐심도유천층5 m도중심층300 m좌우.준갈이분지남연동부태28정구감탐실례표명,통과전성분층、소절사화지진미측정성과자료종합해석,재표층결구건모화계산정교정량방면취득량호효과.
In the marginal zone of one of oil-fields in Jungar basin,we have putted in practice Coincident-Loop Configura-tion TEM for shallow geologieal structure investigating.In order to image continuously and intuitionistic the vertical variety of the conductive layer underground,a new definition of all-time apparent resistivity which is called pseudo-all-time apparent resistivity is used for data processing.Forward modify method is used for data inversing.In this article,"non-linear high order polynomial fit method".a new technology is also introduced to transform resistivity profile into velocity profile under the control of a little micro-well logging.Kriging interpolation method is used for calculating the planar velocity distribution of low velocity zone from five profiles TEM data.Results indicated that this method can be used for studying subtly the variety characteristic of electric parameters of subsurface layer within 10 to 300 meters depth range.The layer electric interface determined from TEM data is comparable to the velocity interface from micro-well logging.It is feasible to provide static correction data for 3-D seismic zone by TEM method.A1so,test shown that Static Correction effect is better by TEM than other method.