Dynamic simulation method of circulating temperature variation in RMR subsea pump mud-lift drilling system
The invention discloses a dynamic simulation method of circulating temperature variation in RMR subsea pump mud-lift drilling system, including steps: obtaining operating parameters, environmental parameters, well structure parameters and thermal parameters of target well; establishing temperature control equation of drill string in seawater section, temperature control equation of drill string in formation section, temperature control equation of annulus in formation section, and temperature control equation of return pipe in seawater section; re-determining initial and boundary conditions; discretizing spatial structure of the whole system with inner node method; discretizing control equations on corresponding nodes; substituting corresponding parameters into discrete expressions to obtain circulating temperature in drill string of seawater section, circulating temperature in drill string of formation section, circulating temperature in annulus of formation section, and circulating temperature in return pipe of seawater section. The dynamic analysis model established by the present invention is more suitable for actual operating conditions.
SOUTHWEST PETROLEUM UNIVERSITY
G E E
G06F E21B E21B
inventional additional inventional
Weilin Xuefeng Cuinan Lin Xiaoxiao Peigang Jie Xin
Chen Sun Li Chen Du Wang Zhang Li