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    超深层直推存储式声波测井评价方法研究以塔里木富满油田断控型碳酸盐岩储层为例

    Research on direct push storage acoustic logging evaluation methods for ultra-deep reservoirs: A case study of fault-controlled carbonate reservoirs in Fuman Oilfield, Tarim Basin

    • 摘要: 直推存储式测井新工艺适用性强、井控安全性高,有效解决了富满油田超深井在高温高压、易喷易漏的复杂井况下测井资料安全采集的难题。但富满油田以大斜度井、水平井为主的井型导致仪器测量不居中,仪器运动状态非匀速,极大影响了直推存储式声波时差质量,以声波测井资料为主的储层分级评价方法也不完善,严重影响了测井储层评价。针对直推存储式声波测井仪器的特点,研发了直推存储式声波纵、横波时差提取及模式波相对幅度处理方法,建立了水平井近井筒反射波成像处理方法,实现了断控型碳酸盐岩储层井筒到井周储层有效性评价;计算井筒距离,进行反射体三维成像,综合评价侧钻井井旁反射体的有效性。系列技术在富满油田超深断控型碳酸盐岩储层评价中进行了规模化应用,支撑了缝洞储层井筒−井周−井旁储集体有效性的综合评价,测井解释符合率达96.7%,应用效果显著。

       

      Abstract: The new direct push storage logging technology has strong applicability and high well control safety, effectively solving the logging data acquisition problem under complex well conditions such as high temperature and high pressure, easy blowout, and frequent lost circulation in ultra-deep wells of Fuman Oilfield. However, the well type of Fuman Oilfield, dominated by highly deviated and horizontal wells, makes the instrument measurement not centered and the motion speed of the instrument not constant, which greatly affects the quality of direct push storage slowness, and the reservoir grading evaluation method mainly based on acoustic waves is incomplete, seriously affecting the evaluation of logging reservoirs. Based on the characteristics of direct push storage acoustic instruments, a method for extracting the direct push storage slowness of the P-wave and S-wave and processing the relative amplitude of the mode wave was developed. A reflection imaging processing method near the wellbore in horizontal wells was established, achieving effective evaluation of fault-controlled carbonate reservoirs in the wellbore and around the wellbore. The distance between the wellbore was calculated, and 3D imaging of the reflectors was performed. The effectiveness of the reflectors near the sidetrack wellbore was comprehensively evaluated. Those technologies have been applied on a large scale in the ultra-deep fault-controlled carbonate rocks of Fuman Oilfield, supporting the comprehensive effectiveness evaluation of reservoirs in the wellbore, around the wellbore, and near the wellbore. The logging interpretation accuracy rate has reached 96.7%, and the application effect is significant.

       

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