声波远探测技术在救援井中的应用研究

Research on the Application of Acoustic Far Detection Technology in Relief Well

石油钻井过程中一旦发生井喷事故,带来的损失往往不可估量。救援井是控制事故井的有效技术手段,其在实施过程中需要准确探测事故井的位置。研究了声波远探测技术在救援井技术中定位事故井的可行性。基于三维时域有限差分法,模拟偶极声源激励时的邻井散射波场,分析同时存在2个不同方位邻井时不同类型极化波的响应特征。在此基础之上,利用实测数据完成邻井位置成像。结果表明,声波远探测技术能够在救援井中对不同方位的邻井进行精确成像,对于事故井的定位具有重要意义。

Once a blowout occurs in the process of oil drilling,the losses are often inestimable.Relief well is an effective technical means to control the accident well,and it needs to accurately detect the location of the accident well in the implementation process.This paper studies the feasibility of acoustic far detection imaging in the location of the accident well.Based on the three-dimensional finite-difference time-domain method,the scattering wave field of the adjacent well excited by the dipole sound source is simulated,and the response characteristics of different types of polarized waves when there are two adjacent wells in different azimuths are analyzed.On this basis,the location of the adjacent well is imaged by using the measured data.The results show that the acoustic far detection imaging can accurately image the adjacent wells in different azimuths in the relief well,which is of great significance for the location of the accident well.