钻井液循环系统减缓液面波动装置研发与应用

发布时间：2019-03-21 08:54

【摘要】：钻井施工过程中需要对溢流、井漏进行及时监控,发现问题后要立即采取相应井控措施。为实现"1m~3发现,2m~3关井"的目标,对现有溢流监测装置进行了改进。将钻井液高架槽的单挡板改为双挡板结构,利用挡板1降低钻井液流动速度,减缓钻井液液面波动;利用挡板2调节液面高度,实现液面高度差变化的精确计量。根据U形管原理设计了钻井液罐浮球式装置,不仅消除了滤圆筒外液面的波动,同时解决了气泡聚集的问题,能够精确计量发生井漏或溢流后钻井液罐中钻井液的体积变化量。改进后的溢流监测装置在塔河油田60余口井进行了推广使用,其中6口井发生溢流时,该装置均能准确地发现溢流,关井后溢流量均在2m~3以内,较传统的人工方法能够更加及时准确地发现溢流。现场应用表明,该装置能有效提高发现溢流、井漏的灵敏性,解决现场发现溢流滞后的问题,可为精确发现溢流提供技术支撑。
[Abstract]:The overflow and well leakage should be monitored in time during drilling operation, and the corresponding well control measures should be taken as soon as the problems are discovered. In order to realize the goal of "1m~3 discovery, 2m~3 shut-in", the existing overflow monitoring device has been improved. The single bezel of drilling fluid viaduct is changed into double baffle structure, the flow velocity of drilling fluid is reduced by baffle 1, the fluctuation of drilling fluid level is slowed down, and the height of liquid level is adjusted by baffle 2 to realize the accurate measurement of the variation of liquid level height. According to the principle of U-tube, the float-ball device of drilling fluid tank is designed, which not only eliminates the fluctuation of fluid level outside the filter cylinder, but also solves the problem of bubble accumulation. It can accurately measure the volume change of drilling fluid in drilling fluid tank after well leakage or overflow. The improved overflow monitoring device has been widely used in more than 60 wells in Tahe Oilfield. When overflow occurs in 6 wells, the overflow can be found accurately, and the overflow after shut-in is within 2m~3. Compared with the traditional artificial method, the overflow can be found more timely and accurately. The field application shows that the device can effectively improve the sensitivity of finding overflow and well leakage, solve the problem of finding overflow lag in the field, and provide technical support for accurately detecting overflow.
【作者单位】：中国石化西北油田分公司石油工程监督中心;
【基金】：中国石化西北油田分公司科技攻关项目“精确发现溢流综合技术研究”(编号:XOKYXX160029)部分研究内容
【分类号】：TE254

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