井筒微芯片示踪器的深度定位研究  

Depth Location of Microchip Tracer in Borehole

作　　者：朱祖扬 刘江涛[1,2] 杨明清 赵金海[1,2,4] 张卫 ZHU Zuyang;LIU Jiangtao;YANG Mingqing;ZHAO Jinhai;ZHANG Wei(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing 100101,China;Sinopec Research Institute of Petroleum Engineering,Beijing 100101,China;Sinopec Petroleum Engineering Technology Service Co.,Ltd.,Beijing 100020,China;Houston R&D Center of Sinopec,Houston,TX 77056,USA)

机构地区：[1]页岩油气富集机理与有效开发国家重点实验室,102206 [2]中国石化石油工程技术研究院 [3]中石化石油工程技术服务有限公司 [4]中石化休斯顿研究开发中心

出　　处：《钻采工艺》2021年第1期7-12,共6页Drilling & Production Technology

基　　金：中国石化科技部国际合作项目“井下温度压力检测微芯片示踪器研制”(编号:P14002);国家自然科学基金项目“海相深层油气富集机理与关键工程技术基础研究”(编号:U19B6003)资助。

摘　　要：针对微芯片示踪器只有时间信息而没有井深信息,不容易评价不同井深的温度和压力状况的问题,开展了微芯片示踪器深度定位方法研究。分析了时间分配法和速度定位法的特点,根据井筒物理参数、钻井液参数和微芯片示踪器参数,计算钻井液在环空内的上返速度,以及微芯片示踪器在钻井液内的下沉速度,从而获得微芯片示踪器在不同井段内的上返速度或者上返时间。提出了速度解算法的微芯片示踪器深度定位方法,把微芯片示踪器下沉速度的计算归为一元多次方程的求解,最大程度地降低了由于输入参数不准而导致的计算偏差。开展了1口浅井和1口深井的微芯片示踪器入井试验,微芯片示踪器均测量到了井筒的温度数据,通过深度定位方法得到了这2口井不同深度点对应的温度。由于对钻井液性能参数估算不准,利用速度定位法计算的微芯片示踪器在浅井的运动速度偏低,而在深井的运动速度偏高,获得的微芯片示踪器的井深信息不准。研究结果表明,利用时间分配法和速度解算法等深度定位方法能够获得微芯片示踪器的井深信息,从而能够用微芯片示踪器准确评价不同井深的温度和压力状况,对于智能钻井技术具有重要意义。A microchip tracer just records time data but without depth,it is difficult to evaluate temperature and pressure conditions in different depth.In order to solve this problem,the method of depth location of tracer is studied in detail.The principle of Time Distribution Method(TDM)and Velocity Position Method(VPM)are discussed,which calculating upward velocity of drilling fluid and sink velocity of tracer in annulus space based on physical parameters of borehole,drilling fluid and tracer,and getting upward velocity and upward time of tracer in different section of borehole.Velocity Solution Method(VSM)is proposed for locating depth of tracer,which calculating the sink velocity of tracer based on one element multiple order equation solution,and reducing error produced by inputting inaccurate parameters.The tracer is used in a shallow well and a deep well,and obtains the entire borehole temperature respectively,the temperature in different depth point is showed with TDM and VSM.Due to the inaccurate estimation of drilling fluid performance parameters,the velocity calculated by velocity positioning method is low in shallow wells and high in deep wells.The research shows that the depth location of tracer can be obtained through such depth location methods as Time Distribution Method and Velocity Position Method.Therefore the tracer can be used to accurately evaluate the temperature and pressure of different well depths,which is of great significance for intelligent drilling technology.

关 键 词：微芯片示踪器 随钻测量 钻井液速度 时间分配 速度定位 时深转换 

分 类 号：TE927[石油与天然气工程—石油机械设备]