元素录井技术在大港油田奥陶系潜山界面卡取中的应用  

Application of element logging technology to the interface determination of Ordovician buried hill in Dagang Oilfield

作　　者：何成山 HE Chengshan(Exploration Enterprise of PetroChina Dagang Oilfield Company,Tianjin 300280,China)

机构地区：[1]中国石油大港油田公司勘探事业部

出　　处：《录井工程》2023年第2期28-33,共6页Mud Logging Engineering

摘　　要：大港油田奥陶系潜山构造复杂,实钻潜山界面与地质设计出入较大,录取的岩屑比较细碎甚至呈现粉末状,难以直观识别岩性,给潜山界面卡取带来了极大的困难,录井现场需要一种快速、精准识别岩性的方法。元素录井具有很好的时效性、准确性,通过总结奥陶系潜山界面附近地层主要造岩元素、重要组成元素及微量元素含量在潜山界面处的变化规律,综合应用卡层敏感元素、进入潜山预警元素、水体环境指数来辅助奥陶系潜山界面准确卡取,减少了钻井施工过程中存在的风险,提高了钻探时效,取得了良好的效果。The structures of the Ordovician buried hill in Dagang Oilfield are complex,and the actual drilled buried hill interface differs greatly from the geological design.The collected cuttings are relatively fine or even powdery,making it difficult to visually identify the lithology,which brings great difficulties to the determination of the buried hill interface.A fast and precise lithology identification method is needed on mud logging sites.Element logging is fast and accurate for analyzing the samples.By summarizing the variation regularity of the content of principal rock-forming elements,important constituent elements and trace elements in the strata near the buried hill interface of the Ordovician system,comprehensively applying the sensitive elements of layer determination,the early warning elements of entering the buried hill and the water environment index to assist the accurate determination of the buried hill interface,the risks existing in the drilling operation are reduced and drilling cycle is shortened.Good results have been obtained.

关 键 词：潜山界面 元素录井 预警元素 铝土岩 卡层 奥陶系 

分 类 号：TE132.1[石油与天然气工程—油气勘探]