X射线衍射录井技术在渤海M构造岩性识别中的应用

doi:10.3969/j.issn.1672-9803.2020.03.025

摘要/Abstract

摘要： 渤海油田深层潜山界面存在深度预测误差大、岩性复杂以及岩屑细碎辨识难、岩性界面识别难等录井作业难题。通过X射线衍射全岩矿物分析(XRD)录井技术获取的矿物含量占比数据,归纳总结出三大岩类在矿物含量上的差异性规律,筛选出石英、长石、暗色矿物等敏感元素,通过不同矿物交会分析,建立了M构造火成岩、砂泥岩和碳酸盐岩不同岩性特征的图板。在岩性识别图板的基础上,拓展利用矿物含量纵向变化及矿物曲线组合交会法,准确判断地层及岩性界面位置,为潜山界面卡取,砂泥岩剖面划分和侵入岩等特殊岩性识别提供重要依据。新方法在该区块新钻探井的成功应用,为钻井施工安全、潜山界面卡取提供了坚实的技术保障。

关键词: 渤海油田, X射线衍射全岩分析录井, 岩性识别, 交会图板, 曲线交会图, 潜山界面

Abstract: Many problems in mud logging operation of deep buried hill interface in Bohai Oilfield occurred,such as large depth prediction error,complex lithology,difficult identification of fine cuttings,and difficult identification of lithologic interfaces. According to the mineral content percentage data obtained by X-ray diffraction whole-rock analysis (XRD)logging technology,the law of difference in mineral content of three major rock types was summarized,sensitive elements such as quartz,feldspar and dark minerals were screened,and the chart of different lithologic characteristics of the igneous rock,sand mudstone and carbonate rock of M structure was established through the intersection analysis of different minerals. On the basis of the lithology identification chart,the use of the vertical change of mineral content and the intersection method of mineral curve combinations was expanded to accurately identify the position of formation and lithology interfaces,providing an important basis for the determination of buried hill interfaces,sand mudstone section division and the identification of special lithology such as intrusive rocks. The successful application of the new method in newly drilled wells in this block provides a solid technical guarantee for the safety of drilling construction and the determination of buried hill interfaces.

Key words: Bohai Oilfield, X-ray diffraction whole rock analysis logging, lithology identification, intersection chart, curve intersection, buried hill interface

中图分类号:

TE132.1

胡云, 李战奎, 郭明宇, 戴珩, 崔国宏, 张学斌. X射线衍射录井技术在渤海M构造岩性识别中的应用[J]. 录井工程, 2020, 31(3): 130-136.

HU Yun, LI Zhankui, GUO Mingyu, DAI Heng, CUI Guohong, ZHANG Xuebin. Application of X-ray diffraction logging technology in lithology identification of Bohai M structure[J]. Mud Logging Engineering, 2020, 31(3): 130-136.

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