摘要
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.
A certain thickness and width of multiple sets of salt rocks have been developed in Paleogene Shahejie formation at Dongpu depression. However, there is a constantly dispute at the salt cause. In this study, tectonic evolution history, and salt rocks distribution laws controlled by structure were studied using the methods of field observation, laboratory simulation, and drilling, logging, 3D seismic interpretation. The origin and identification mark of salt rocks were also discussed. Results show that the burial depth of Shahejie formation increases gradually since sedimentation at Paleogene, then uplifts slightly at the end of Oligocene, and sinks in the whole. Dongpu depression was of characteristics of saliferous cyclothem （consists of salt rock with mudstone, gypsiferous and dolomitic mudstone） in Shahejie formation based on the tectonic evolution history. In addition, structure controls the distribution laws of the salt rocks. Salt rock existed in the first member of Shahejie formation was mainly distributed at Wangchenggu-Liyuan zone of East sub-depression, Liutun and Huzhuang zones of West sub-depression, and Hubuzhai-Wanglou zone, Wenliunan zone, Liangzhuang-Bagongqiao zone of central structural belt. At last, the origin of salt rocks in Shahejie formation at Dongpu depression were High Mountain-Deep Basin proved from structure, paleogeographic environment, paleontology and paleoclimate. Meanwhile, salt rock can be identified from the symbols of stratum and geophysical logging.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2016年第12期1411-1417,共7页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金青年科学基金(41502156)
中国博士后科学基金面上项目(2014M550809)
关键词
盐岩
分布规律
成因
构造
沙河街组
东濮凹陷
salt rock
distribution law
origin
structure
shahejie formation
dongpu depression
