松辽盆地白垩系大陆科学钻探“松科2井”选址

发布时间：2018-05-31 22:13

本文选题：松辽盆地大陆科学钻探 + 河湖相沉积序列　；参考：《地学前缘》2017年01期

【摘要】：松辽盆地大陆科学钻探工程已经进行了十余年(2005—2016),松科1井于2007年完钻,松科2井于2014年开钻,预计2017年底完钻。该工程的目标是通过实施"2井4孔"钻探,打穿松辽盆地白垩系,获取万米连续高分辨率的陆相地质记录,用以研究白垩纪时期的温室气候变化,以期更好地应对全球变暖使人类面临的挑战。据此确定松科2井的选址原则:地层沉积记录连续;以沉积岩为主,尤其是以湖相细碎屑岩为主;厚度尽可能薄;构造简单;地面施工条件好。松科2井选在松辽盆地徐家围子断陷中沙河子组湖相泥岩最为发育的宋站地区。钻探主要目的层为下白垩统断陷层序的营城组、沙河子组和火石岭组。钻遇主要岩性为含火山岩和火山碎屑岩的砂岩、粉砂岩、泥岩、煤层互层序列,以河湖相反映还原环境的暗色岩系为主。期间穿过断陷层顶(T_4)、底(T_5)界面,上下白垩统界面和白垩系/侏罗系(K/J)界面等反映区域构造-成盆作用的重要地质界线,还会取得与白垩纪超静磁带(CNS)和全球大洋缺氧事件(OAE-1)等重要地质事件相对应的连续岩心记录。
[Abstract]:The continental scientific drilling project in Songliao Basin has been carried out for more than a decade, with well Songke 1 completed in 2007, Songke well 2 in 2014 and expected to be completed by the end of 2017. The goal of the project is to obtain the continuous high resolution terrestrial geological records of ten thousand meters through the Cretaceous system of Songliao Basin by drilling "2 wells and 4 holes", which can be used to study the greenhouse climate change during the Cretaceous period. In order to better meet the global warming challenges facing mankind. Based on this, the selection principle of Songke 2 well is determined: continuous sedimentary records, mainly sedimentary rocks, especially lacustrine fine clastic rocks, as thin as possible, simple structure and good surface construction conditions. Well Songke 2 is selected in Songzhan area, where the lacustrine mudstone of Shahezi formation is the most developed in Xujiaweizi fault depression, Songliao Basin. The main targets of drilling are Yingcheng formation, Shahezi formation and Huoshiling formation in the sequence of lower Cretaceous fault depression. The main lithology of drilling is sandstone with volcanic rock and pyroclastic rock siltstone mudstone coal seam interbedded sequence and dark rock series of river and lake facies reflecting reductive environment. The important geological boundary of regional tectonic-basin-forming process is reflected in the interfacial of upper and lower Cretaceous and the Cretaceous / Jurassic K / J / J interface, which are reflected in the regional tectonic-basin-forming process. Continuous core records corresponding to such important geological events as the Cretaceous ultrastatic magnetic tape (CNS) and the global oceanic anoxic event (OAE-1) are also obtained.
【作者单位】：吉林大学地球科学学院;大庆油田有限责任公司勘探开发研究院;中国地质大学生物地质与环境地质国家重点实验室中国地质大学(北京)地球科学与资源学院;大庆钻探工程公司地质录井一公司;重庆科技学院石油与天然气工程学院;吉林大学古生物学与地层学研究中心;
【基金】：国家重点基础研究发展计划“973”项目(2012CB822002) 中国地质调查局油气基础性公益性地质调查项目(DD20160207-06)
【分类号】：P634;P534.53

【相似文献】