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Around the world, the data assimilation framework has been reported to be of great interest for weather forecasting, oceanography modeling and for shallow water flows particularly for flood model. For flood model this method is a power full tool to identify time-independent parameters (e.g. Manning coefficients and initial conditions) and time-dependent parameters (e.g. inflow). This paper demonstrates the efficiency of the method to identify time-dependent parameter: inflow discharge with a real complex case Red River. Firstly, we briefly discuss about current methods for determining flow rate which encompasses the new technologies, then present the ability to recover flow rate of this method. For the case of very long time series, a temporal strategy with time overlapping is suggested to decrease the amount of memory required. In addition, some different aspects of data assimilation are covered from this case.

The paper discusses two gas condensate development projects in Vietnam, which have and are deploying Managed Pressure Drilling (MPD) Technology. Bien Dong POC in 2010 commenced planning for the Bien Dong 1 High Pressure High Temperature (HPHT) gas condensate development project offshore Vietnam, with bottom hole pressures of 15.2lb/gal - 17.2lb/gal, and with bottom hole temperatures in the range of 155 deg C - 180 deg C. With very narrow kick loss margins inside 0.5 lbs/gal, the probability of serious kick loss issues during the drilling of the reservoir sections looked to be very high. The Bien Dong 1 development is a complex HPHT project ranking one of the most difficult and challenging HPHT projects in Asia Pacific currently. As a remedy for such potential drilling hazards, Managed Pressure Drilling techniques and technology were selected, and implemented. This technology gives the option for accurate early kick detection and if required Constant Bottom Hole Pressure (CBHP) drilling coupled with ECD management. The second project which deployed MPD Technology is the gas condensate development for Cuulong JOC, with lower pore pressures than Bien Dong 1 the range of 12.5lb/gal - 14.0lb/gal but with bottom hole temperatures up to 190 deg C static. The paper will examine the following Reasons and conceptions to use managed pressure drilling technologyPreplanning and engineering of the projectManaged pressure drilling equipment adaption into a new build semi-submersible tender assist, quad mast rig, including modifications to the hook up of the 15K BOP stack and expanded mud gas separator systemImplementation of the project once the rig was on location in readiness to commence drilling the first wellRig crew familiarization and training in MPD techniquesAnalysis of the early results in the project

In this paper the free convection flow of power law fluid in cylindrical channel with heat sources is investigated. The heat sources are in the fluid as well as inside the channel wall and are assumed constant and uniform distributed. The problem is solved by finite difference method. An asymptotic solution is given. The results with heat sources and without ones are compared.

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A numerical solution has been presented for free convection flow of power law fluid in a vertical cylinder of finite height. The average velocity along the channel and the heat transfer have been calculated. Graphs of velocities and temperature are shown. The results show good agreement with analytic one in the asymptotic case.

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In the paper the optimal operation of Hoabinh reservoir for flood control on Hong–Thai Binh river system is presented. The findings show that in the flood season in 1996 if the operation of gates and outlets of Hoa Binh reservoir was made base on the calculated release, the water level at Hanoi would be 12.3 m and the water level of Hoa Binh reservoir would be 98 m. So the calculated release from Hoabinh reservoir in August 1996 can be considered as optimal in the mean that the water level at Hanoi can be controlled and the Hoabinh reservoir still have necessary pool for controlling the next floods.

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