GEOPHYSICAL RESPONSE OF THE STRATIGRAPHIC DIVISION OF YIXIAN FORMATION IN XIUSHUI BASIN, NORTHERN LIAONING PROVINCE
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摘要:
通过采用地表地质调查、钻孔岩心编录、地球物理测井、二维地震等多种技术手段，综合运用岩石地层、测井曲线、二维地震和钻井资料标定相结合的研究方法，将以辽法地1井、秀D1井为代表的义县组划分为4个岩性段，即：一段（K1y1）基性火山岩段，二段（K1y2）火山岩夹沉积-火山碎屑岩段，三段（K1y3）沉积岩段，四段（K1y4）酸性火山岩段.4个岩性段和界面在露头、钻井岩心、测井曲线、地震等资料上的特征明显.重、磁、电剖面联合反演综合解释推断及井震标定后的地震反射特征均表明下白垩统义县组4个岩性段在空间上具有一定的展布特征和分布规律.
Abstract:By multiple technical means of surface geological survey, drill core logging, geophysical well logging and 2D seismic survey, with combination of lithostratigraphy, logging curve, 2D seismic and drilling data calibration, the Yixian Formation represented by LFD1 well and X-D1 well is divided into four lithologic members:the first member (K1y1) of basic volcanic rocks, the second member (K1y2) of volcanic rocks with sedimentary-pyroclastic rocks, the third member of(K1y3) of sedimentary rocks, and the fourth member (K1y4) of acid volcanic rocks. The four members and interfaces have distinguished characteristics in outcrop, drill core, logging curve and seismic data. Both the comprehensive interpretation inference of gravity-magnetic-electric joint inversion and seismic reflection characteristics after well seismic calibration show that the four lithologic members of Yixian Formation, Lower Cretaceous, have certain spatial distribution characteristics and regularities.
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