Inorganic plugs removal using ultrasonic waves

2nd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Khan, Nasir^1 ; Pu, Chunsheng^1 ; Xu, Li^1 ; Lei, Zhang^1

School of Petroleum Engineering, China University of Petroleum (East China), Qingdao

266555, China^1

关键词: Boundary friction;    Environment friendly;    Exposure-time;    Formation damage;    High frequency transducers;    Irradiation time;    Lost productivities;    Particle bridges;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/59/1/012045/pdf
DOI  :  10.1088/1755-1315/59/1/012045

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

It is essential to recover the lost productivity caused by formation damage in the proximity of the wellbore during different well operations. In comparison to conventionally used methods, the efficiency, reliability, environment friendly, and simple and convenient technique of ultrasonic waves make it more attractive in petroleum industries. In current study, ultrasonic waves were applied to mitigate the formation damage caused by deposition of calcium carbonate (CaCO3) nearby well bore. Results showed that 100 minutes exposure time could efficiently recover 38.1% of original productivity but further increase in irradiation time (120mins) would decrease the recovery to 37.1%. This aberration can be attributed to the particle-bridge formation formed by larger particles at later stages and tendency of acoustic wave to push back the fluid flow. Moreover, ultrasonic waves transducer#2 (Frequency 20KHz and Power 1000W) could recovery maximum recovery of 36.3%, however, high frequency transducer was not effective in this recovery. This inorganic removal can be attributed to the cavitation and thermal energy produced through three different ways including cavitation, boundary friction and transformation upon hitting the medium.