钻井液录井迟到时间的连续性校正方法及应用

Continuity correction method and application of drilling fluid logging lagging time

钻井液录井中迟到时间在浅部地层快速钻井条件下变化大,与理论计算值往往差别较大,造成录井资料的质量低。为了解决该问题,综合以往实践经验,在分井段计算理论迟到时间的基础上,赋予各井段井径校正系数,对迟到时间及时进行修正,从而实现迟到时间的连续性校正,确保录井资料的准确性。该方法的应用探索在渤海海域渤中区域钻探过程中取得了较好的效果。

The lagging time of drilling fluid logging changes greatly under the condition of rapid drilling in shallow formation,which is often different from the theoretical calculation value,resulting in the low quality of logging data.In order to solve this problem,based on the previous practical experience and well section division calculation method,the correction coefficient of well diameter is given to each well section,and the lagging time is corrected in time,so as to realize the continuous correction of lagging time and ensure the accuracy of logging data.The application of this method has achieved good results in the process of drilling in Bozhong area of Bohai Sea.