博士生车家琪的论文被期刊“Journal of Natural Gas Science and Engineering”（SCI二区）录用
近日，由王旱祥教授指导、博士生车家琪撰写的论文《Field test and numerical simulation of the section mill in U-shaped wells of coalbed methane》被“Journal of Natural Gas Science and Engineering”正式录用，第一单位为中国石油大学（华东），通讯作者为王旱祥教授。“Journal of Natural Gas Science and Engineering”属于中科院SCI期刊分区基础版二区，2019年影响因子为3.841，主要涉及天然气勘探、生产、加工和输送领域，具体包括天然气的成因和聚集；天然气地球化学气藏工程；测井、测试和评估；提高气体回收率措施；热力学和相态行为，气藏建模和模拟；天然气生产工程；非常规天然气资源的初级生产和增产措施等方面的研究。
In order to improve working performance of the section mill in U-shaped wells of coalbed methane (CBM), a numerical simulation model of section mill with single knife was established to study working process and mechanism of the section mill. Then a section mill was tested in a field CBM well named SX-T-02 in Qinshui Basin of China to verify the simulation results. Besides, the working process of the section mill, as well as the chip topography and formation mechanism was analyzed in simulation and field tests. Also, the influence of different working parameters on working performance of the section mill was carried out and an evaluation chart to choose recommended working parameters was established. Analysis results indicate that the error between simulation and field test result is within 11.9%, which verifies the fine accuracy of the numerical simulation model. Both the chips in simulation and field tests are curled chips, and when the rotating speed grows, the chip becomes smooth and the radius of curvature increases considerably. The working performance of the section mill is comprehensively determined by the working parameters including rotation speed and weight on bit (WOB). When it is necessary to balance the relationship between working efficiency and safety, rotating speed of 80 r/min and WOB of 12 kN are recommended. These studies are significant for satisfying the higher requirements on the working performance of the section mill for the development of CBM U-shaped wells in the field.