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借助野外地质调查、室内盆地模拟及钻井、录井、测井和三维地震资料解释等方法,对东濮凹陷盆地构造演化历史及构造控制盐岩的分布规律进行分析,对盐岩成因及识别标志进行探讨,研究结果表明:自古近系沙河街组沉积以来,研究区地层埋深逐渐增加,至渐新世末,地层有小幅抬升后又整体下沉,在此基础上盆地内沉积形成一套由盐岩夹泥岩、含膏泥岩及白云质泥岩等组成的沙河街组含盐韵律;构造控制盐岩分布规律,沙一段盐岩主要分布在东部次凹的王称固-梨园成盐区和西部次凹的柳屯成盐区、胡状成盐区以及中央构造带的户部寨-王楼成盐区、文留南成盐区、梁庄-八公桥成盐区;最后分别从构造、古地理环境、古生物和古气侯方面论证了东濮凹陷沙河街组盐岩为高山深盆成因,同时提出了盐岩的地层和地球物理测井识别标志.
With the help of field geological survey, indoor basin modeling and interpretation of drilling, logging, logging and 3D seismic data, the tectonic evolution history of Dongpu Depression basin and the distribution of structurally controlled salt rock are analyzed. The causes and identification of salt rock The results show that since the sedimentation of Shahejie Formation in the Paleozoic, the stratigraphic burial depth of the study area gradually increases. At the end of Oligocene, the strata uplift slightly and then sink as a whole. On this basis, a set of sediments are formed in the basin The salt rhythm of the Shahejie Formation, which is composed of salt rock mudstone, mudstone mudstone and dolomitic mudstone, is controlled by tectonic control of salt rock distribution. The salt rocks of the first member of Shahejie Formation are mainly distributed in the salt formation area of Wangchenggu- The western subgale of Liutun salt-forming area, the Hu-cheng salt-forming area and the central tectonic belt of the Huibuzhai-Wanglousheng salt area, Wenliu-South salt formation area, Liangzhuang-Baghongqiao salt formation area; and finally from Tectonic, palaeogeomorphology, paleontology and paleoclimatic aspects, the salt rocks of Shahejie Formation in Dongpu Depression are identified as the genesis of deep mountains in the high mountains. At the same time, stratigraphic and geophysical logging identification marks of salt rocks are proposed.