• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Ocean, Offshore and Arctic Engineering >STUDY ON SAFETY OPERATION PERIOD MODEL OF DEEP WATER TYPHOON AVOIDANCE WELL CONTROL CONSIDERING RHEOLOGICAL CHARACTERISTICS OF DRILLING FLUID
【24h】

STUDY ON SAFETY OPERATION PERIOD MODEL OF DEEP WATER TYPHOON AVOIDANCE WELL CONTROL CONSIDERING RHEOLOGICAL CHARACTERISTICS OF DRILLING FLUID

机译：深水台风避免井控制安全运行期模型研究考虑钻井液流变特性

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

During the period of avoiding typhoon in deep-water drilling, the gas intrusion in the wellbore brings higher risk to the well opening operation. It is very important to improve the accuracy of typhoon avoidance cycle prediction to improve the efficiency of drilling operation and reduce the risk of well control. According to the yield stress characteristics of drilling fluid, the gas migration experiment in the yield stress fluid is carried out in this paper. Based on the experimental results and stress analysis, a prediction model of bubble rising velocity suitable for the yield drilling fluid is established. Considering the rheological properties of drilling fluid and pore characteristics of formation, a prediction model of initial bubble size is established. Combined with the velocity prediction model and bubble size prediction model, the calculation method of typhoon avoidance period is proposed. Through the calculation and analysis, it is found that under the condition of low invasion rate, the formation porosity has little influence on the initial size of bubbles, and the yield stress value of drilling fluid has great influence on the initial size of bubbles. At the same time, the model in this paper makes up for the problem that the prediction value of safe typhoon avoidance period calculated by the previous model is large, and reduces the risk of well opening operation. According to our calculation results, the measures of injecting drilling fluid with low yield stress at the bottom of the well and injecting drilling fluid with high yield stress at the top are put forward, which can effectively increase the safe typhoon avoidance period.
机译：在避免深水钻井中的台风时期，井筒中的气体侵入为开放式运行较高。提高台风避免循环预测的准确性是非常重要的，以提高钻孔操作效率，降低良好控制的风险。根据钻井液的屈服应力特性，本文进行屈服应力流体中的气体迁移实验。基于实验结果和应力分析，建立了适用于产率钻井液的气泡上升速度的预测模型。考虑到钻井液的流变性和形成的孔隙特性，建立了初始气泡尺寸的预测模型。结合速度预测模型和气泡尺寸预测模型，提出了台风避免期的计算方法。通过计算和分析，发现在低侵袭率的条件下，地层孔隙率对气泡的初始尺寸几乎没有影响，钻井液的屈服应力值对初始尺寸的气泡产生很大影响。同时，本文的模型弥补了通过先前模型计算的安全台风避免时段的预测值大的问题，并降低了开放操作的风险。根据我们的计算结果，提出了在井底的井下注入钻井液的措施，并在顶部注入具有高屈服应力的钻孔流体，从而有效地增加了安全的台风避免时期。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号