元素录井技术在塔里木油田现场录井中的应用
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摘要
针对塔里木油田塔中、塔北、库车三大区块目的层埋深大、构造复杂、地层压力系统差异大、非均质性强以及钻井工艺提升导致的岩屑细碎、地质界面识别不清楚,碳酸盐岩地层划分、界面卡取及膏盐岩层界面卡取难,钻遇高压盐水层及孔、缝、洞发育段出现易漏、溢、卡的钻井复杂加大经济成本,影响钻井周期等一系列问题,在现场录井的基础上,利用元素录井技术将地层资料数据化、曲线化并成图,可直观反映地层变化特征。通过区域井应用元素录井技术并总结、寻找规律,进而对岩性进行有效识别、预判膏盐岩层底部界线、进行碳酸盐岩地层划分和层位卡取,在钻遇异常高压层及孔、缝、洞发育段实现提前预警、规避钻井复杂,在油气勘探开发领域切实发挥了元素录井技术优势。
Aiming at a series of problems in target beds of Tazhong,Tabei and Kuqa blocks,Tarim Oilfield,for example,large buried depth,complex structure,great difference of formation pressure system,strong heterogeneity and drilling technology upgrading result in fine cuttings and unclear identification of geological interface,difficult carbonate formation division,interface determination and interface determination of gypsum-salt rock bed,and when drilling in high pressure salt water layer and the development section of pore,seam and vug,the drilling complexity of easy leakage,overflow and sticking increases the economic cost and affects the drilling cycle,etc.On the basis of field mud logging,formation data are digitalized,curvilinearized and the result maps are formed by using element logging technology,which can directly reflect the characteristics of formation variation.Through the application of element logging technology in regional wells and summing up and finding the law,the lithology can be effectively identified,the bottom boundary of gypsum-salt rock bed can be predicted,and the carbonate formation division and horizon determination can be carried out.Early warning can be realized in abnormal pressure formation and development section of pore,seam and vug to avoid drilling complexity,and the advantages of element logging technology are brought into play in the field of oil and gas exploration and development.
Aiming at a series of problems in target beds of Tazhong,Tabei and Kuqa blocks,Tarim Oilfield,for example,large buried depth,complex structure,great difference of formation pressure system,strong heterogeneity and drilling technology upgrading result in fine cuttings and unclear identification of geological interface,difficult carbonate formation division,interface determination and interface determination of gypsum-salt rock bed,and when drilling in high pressure salt water layer and the development section of pore,seam and vug,the drilling complexity of easy leakage,overflow and sticking increases the economic cost and affects the drilling cycle,etc.On the basis of field mud logging,formation data are digitalized,curvilinearized and the result maps are formed by using element logging technology,which can directly reflect the characteristics of formation variation.Through the application of element logging technology in regional wells and summing up and finding the law,the lithology can be effectively identified,the bottom boundary of gypsum-salt rock bed can be predicted,and the carbonate formation division and horizon determination can be carried out.Early warning can be realized in abnormal pressure formation and development section of pore,seam and vug to avoid drilling complexity,and the advantages of element logging technology are brought into play in the field of oil and gas exploration and development.
引文
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[4] 朱根庆,何国贤,康永贵.X射线荧光录井资料基本解释方法[J].录井工程,2008,19(4):6-11.ZHU Genqing,HE Guoxian,KANG Yonggui.Basic interpretation method of X-ray fluorescence logging data[J].Mud Logging Engineering,2008,19(4):6-11.
[5] 谢元军,邱田民,李琴,等.X射线荧光元素录井技术应用方法研究[J].录井工程,2011,22(3):22-28.XIE Yuanjun,QIU Tianmin,LI Qin,et al.Research on application method of X-ray fluorescence elemental logging technology[J].Mud Logging Engineering,2011,22(3):22-28.
[6] 王晓阳.X射线荧光元素录井技术在地质上的应用及新进展[J].录井工程,2014,25(2):39-42.WANG Xiaoyang.Application and new progress of X-ray fluorescence elemental logging technology in geology[J].Mud Logging Engineering,2014,25(2):39-42.
[7] 张坤贞,郑玉朝,杨永灵,等.X射线荧光元素分析在普光地区茅口组白云岩化程度识别中的应用[J].录井工程,2017,28(3):48-50.ZHANG Kunzhen,ZHENG Yuzhao,YANG Yongling,et al.Application of X-ray fluorescence elemental analysis in the identification of dolomite degree in Maokou formation in Puguang area[J].Mud Logging Engineering,2017,28(3):48-50.
[8] 雷军,王慎实,杨钰.岩屑录井数字化技术在塔里木油田的应用[J].录井工程,2017,28(4):1-6.LEI Jun,WANG Shenshi,YANG Yu.Application of cuttings digital logging technology in Tarim Oilfield[J].Mud Logging Engineering,2017,28(4):1-6.