深水开路钻井浅层气井喷后羽流演化模拟  

Simulation of Plume Evolution after Shallow Gas Well Blowout in Deepwater Open-Circuit Drilling

作　　者：李泽钦 王志远[1] 赵阳[3] 吕冯君 付玮琪 张剑波[1,2] 裴继昊 Li Zeqin;Wang Zhiyuan;Zhao Yang;Lyu Fengjun;Fu Weiqi;Zhang Jianbo;Pei Jihao(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China;National Engineering Research Center of Oil&Gas Drilling and Completion Technology,Qingdao 266580,China;Oil Production Technology Research Institute,Dagang Oil Company,Tianjin 300280,China;CNPC Offshore Engineering Company Limited,Beijing 100028;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221000,China)

机构地区：[1]石油工程学院中国石油大学(华东),青岛266580 [2]油气钻完井技术国家工程研究中心,青岛266580 [3]大港油田公司采油工艺研究院,天津300280 [4]中国石油集团海洋工程有限公司,北京100028 [5]煤炭资源与安全开采国家重点实验室中国矿业大学,徐州221000

出　　处：《水动力学研究与进展（A辑）》2024年第5期649-654,共6页Chinese Journal of Hydrodynamics

基　　金：中国石油天然气集团有限公司重大科技项目(ZD2019-184-003);国家自然科学基金联合基金项目(U21B2069);国家自然科学基金青年科学基金(52104047);山东省重点研发计划重大科技创新工程(2022CXGC020407);中石油科技创新基金(2021DQ02-1005);中央高校基本科研业务经费(2022ZZCX05K6)。

摘　　要：在深水开路钻井过程中,易钻遇赋存浅层气的地层。浅层气层具有高压性质,易导致井涌甚至井喷,威胁钻井安全。该文基于CFD-PBM(种群平衡模型)模拟方法,建立了包含流体运移与水合物相变的羽流运动模型,研究深水开路钻井过程中发生浅层气井喷后羽流的形成与演化规律。研究结果表明,流体侵入井筒初期,存在水合物生成现象,且在井壁附近的水合物生成量较多。井筒流体喷出时,天然气主体运移具有滞后性,水合物流会随气体前沿先喷出井筒,之后气体主体喷出。井喷早期流体会经历直射流、射流分支、射流弯曲和扩散形成羽流的过程,同时在符合水合物生成条件的海水深度,水合物被气体羽流裹挟持续运移。该文总结了深水开路钻井井喷后气泡羽流的运移与演化规律,可为深水井喷后的安全举措提供依据。In the process of deep-water open-circuit drilling,it is easy to encounter shallow gas formations.The shallow gas layer has a high-pressure nature,which can easily lead to well surge or even blowout,threatening the drilling safety.In this study,based on the CFD-PBM(population balance model)simulation method,a plume motion model including fluid transport and hydrate phase change is established to study the formation and evolution of the plume after a shallow gas blowout occurs during deepwater open-circuit drilling.The results show that hydrate generation exists at the early stage of fluid intrusion into the wellbore,and the amount of generation is higher near the well wall.When the wellbore fluid is spewed out,the main body of natural gas is transported with a lag,and the hydrate stream will be spewed out of the wellbore with the gas front first,after which the main body of gas is spewed out.In the early stage of well blowout,the fluid will go through the process of straight jet flow,jet branching,jet bending,and diffusion to form a plume,and at the same time,in the seawater depth that meets the conditions for hydrate generation,the hydrate is continuously transported by the gas plume.This study summarizes the transport and evolution of the gas bubble plume after the blowout of deepwater open-circuit drilling wells,which can provide a favorable basis and reference for the safety measures afterthe deepwaterblowout.

关 键 词：深水 开路钻井(无隔水管钻井) 浅层气井喷 羽流 水合物 

分 类 号：TE95[石油与天然气工程—石油机械设备]