Recently, the economic feasibility of drilling a horizontal well improved drastically due to advances in drilling technology. Advantages of horizontal wells over vertical well applications have been confirmed by many scientists(1-4) and operators(5-7). Horizontal wells showed many distinct advantages over vertical ones such as improvement of well productivity, attenuation of sand production, an...

This thesis was set to tackle the gas coning problem in oil-rim reservoirs with horizontal wells. The focus was short term production planning in the sub-critical phase only. Different controllers were developed and assessed based on the objective of netpresent-value (NPV) of oil produced in the sub-critical phase. The reservoir model is a 1-D partial differential equation describing the dynami...

We discuss a geometric method, which we refer to as Coning, for generating new Poincaré type inequalities from old ones. In particular, we derive weighted Poincaré inequalities for star-shaped domains and variant Trudinger inequalities for another class of domains. By a Poincaré type inequality, in the widest sense, we mean a norm inequality in which the variation of a function from its “averag...

The attitude algorithms can enormously affect the navigation accuracy of SINS and Runge-kutta algorithm, Peano-Baker approximation algorithm rotation vector are common in engineering application. Analysis comparison done to above three this paper, simulated verified under coning motion result show that condition low angle vibration , fourth-order has best comprehensiveperformance.