西北地质2024，Vol.57Issue(6)：171-185,15.DOI:10.12401/j.nwg.2024076
银额盆地苏红图坳陷MSD1井二叠系地层厘定及油气地质意义
Permian Formation Characteristics and Petroleum Geological Significance of Well MSD1 in Suhongtu Depression,Yin'e Basin
摘要
Abstract
For a long time,due to the unclear understanding of the characteristics of Permian residual strata in the coverage area of yin'e basin,the geological age of oil and gas production layers revealed by drilling in the basin is controversial.In this study,palynology,mineralogy,zircon chronology and other research work were carried out by using the core samples of the lower well section of well msd1 in Suhongtu depression of yine basin,and stratigraphic correlation was carried out in combination with the drilling,seismic survey line and sur-face outcrop data in the basin.The following understandings were obtained:① sporopollen molecules such as florinites,vesicaspora,stratoabieites,vittatina and hamiapollenites found in the 2 669.00～2 726.00 m well sec-tion of well msd1 in Suhongtu depression,The scattered bioclastic distribution of brachiopods,crinoids and bry-ozoans can be seen under the thin section microscope of clastic rock,indicating that the stratum of this section is the upper Permian halsuhai formation,which is in the Late Permian.② Combined with drilling time depth cali-bration and seismic horizon tracking,it is clear that the Permian in yine basin is widely distributed in the cover-age area of the basin.The seismic reflection of the Permian presents the characteristics of weak reflection blank reflection,medium weak amplitude,poor continuity in the layer and occasional strong amplitude continuous boundary at the bottom,reflecting that the Permian has experienced multi-stage structural transformation after sedimentation.③ Two sets of oil and gas systems of Cretaceous and Permian have been found in many wells in the basin.The geochemical characteristics of drilling source rocks show that the Permian in yine basin has rich oil and gas exploration potential.It is comprehensively considered that the Permian prototype basin in yine basin has a wide distribution range,rich oil and gas resource potential,strong zoning of late structural transformation,and serious structural damage in some areas.The discovery of Permian paleontostratigraphic evidence in well msd1 further strengthens the exploration prospect of Permian.关键词
上二叠统/哈尔苏海组/孢粉古生物/锆石定年/银额盆地Key words
Upper Permian/Haersuhai Formation/palynological paleontology/zircon dating/Yin'e basin分类
天文与地球科学引用本文复制引用
韩小锋,季兴开,崔海峰,宋博,许伟,史冀忠,赵飞,许海红,王天云,王宝文..银额盆地苏红图坳陷MSD1井二叠系地层厘定及油气地质意义[J].西北地质,2024,57(6):171-185,15.基金项目
中国地质调查局项目"银额盆地西部-北山盆地群油气地质调查"(DD20190092)、"河西走廊盆地群油气地质调查评价"(DD20242183)、"西部重点盆地油气地质调查与评价"(DD20242212),国家自然科学基金项目"阿拉善北部晚古生代构造格局与洋盆闭合过程的古地磁重建"(42172260)联合资助. （DD20190092）
