摘要
无隔水管海底泵举升系统(RMR)受限于深水钻井作业技术和理论的缺乏,难以满足实际要求。为此,根据RMR系统双梯度钻井原理,建立了正常工况下井底压力控制方程,并将常规的流量调节与海底泵流量调节特性相结合,对RMR系统在正常工况下井底压力与流量之间的变化规律进行了分析。研究结果表明:流量调节对井底压力的控制作用更适宜在海水深度1000~1500 m、地层深度3000~4000 m、钻井液密度1.16~1.21 g/cm^(3)、井眼直径311.0~400.0 mm、钻杆外径101.6 mm、钻井泵出口流量25~28 L/s、钻井液塑性黏度20~26 mPa·s、动切力5~8 Pa工况下进行;井底压力为80.16 MPa时,流量可调范围为26~42 L/s,机械钻速调节范围为0.0~7.2 m/h。所得结论可为RMR系统在海洋深水和超深水领域的应用提供技术借鉴。
For lack of deepwater drilling technology and theory,riseless mud recovery system(RMR)is difficult to meet practical requirements.Therefore,according to the double gradient drilling principle of RMR system,the control equation of bottom hole pressure under normal working conditions was established and the conventional flow rate regulation and the flow regulation characteristics of submarine pump were combined to analyze the change rule between bottom hole pressure and flow rate of RMR system under normal working conditions.The results show that the control effect of flow regulation on bottom hole pressure is more applicable in seawater depth of 1000~1500 m,formation depth of 3000~4000 m,drilling fluid density of 1.16~1.21 g/cm^(3),borehole size of 311.0~400.0 mm,drill pipe diameter of 101.6 mm,drilling pump outlet flow rate of 25~28 L/s and drilling fluid plastic viscosity of 20~26 mPa·s and yield point of 5~8 Pa.When the bottom hole pressure is 80.16 MPa,the adjustable range of flow rate is 26~42 L/s,and the adjustable range of ROP is 0.0~7.2 m/h.The conclusions provide technical reference for the application of RMR system in deepwater and ultra-deepwater drilling.
作者
张杰
王芷桁
李鑫
李翠楠
李荣鑫
孙瑞涛
Zhang Jie;Wang Zhiheng;Li Xin;Li Cuinan;Li Rongxin;Sun Ruitao(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University;Petroleum Engineering School,Southwest Petroleum University;Engineering Technology Research Institute,PetroChina Southwest Oil&Gas Field Company)
出处
《石油机械》
北大核心
2022年第7期55-62,共8页
China Petroleum Machinery
基金
国家重点研发计划项目“无隔水管海底泵举升双梯度钻井系统技术及工艺”(2018YFC0310200)
国家自然科学基金面上项目“环空气液两相流中气泡微观动态特征研究”(51274168)
西南石油大学研究生科研创新基金重点项目“无隔水管海底举升系统溢流监测与控制方法研究”(2020CXZD30)。
