... directional drilling drillstem testing information drilling operation permeability influx rate drilling assumption bottom hole pressure wellbore kpa bha mathematical model reservoir pressure horizontal well upstream oil & gas drilling history underbalanced drilling annulus pressure...

... the assumption of paraffin precipitation in the reservoir as the cause for the low recovery factor, and eventually put to the test recovery strategies that would ensure the economical exploitation of the shallow deposits of paraffinic crude in Reconcavo Basin. This paper summarizes the major accomplishments...

... subjected to higher grain stresses than would be generated by decreasing the pore pressure to zero. sagd assumption fraction recovery operation operation example field heave measurement heave fluid injection steam-assisted gravity drainage surface heave enhanced recovery reservoir pore...

...-assisted gravity drainage assumption NATURAL AND GAS-LIFT IN SAGD PRODUCTION WELLS R.M.BUTLER S.BHARATHA C.T.YEE Fthis article begins on the next page THE PETROLEUM SOCIETY PAPER 97-111 Natural and Gas-lift in SAGD Production Wells R.M. Butler, S. Bharatha, C.T Yee GravDrain Inc. This paper...

... assumptions stated by Hassler and Brunner were accepted, and the improvements were limited to the solution procedure. Surprisingly, the pressure drop, ΔP 2 , across the interface at the exit end appeared to have escaped the attention of both Hassler and Brunner, and the other authors. They might have consider...

... Abstract The fluid flows in porous medium is described by the diffusion type of partial differential equation. In deriving the flow equation for the constant compressibility fluids, an important assumption is made regarding the magnitude of the pressure gradient: it is assumed...

... Abstract A major assumption incorporated into conventional pressure-transient models is that the conductive and storage properties of a formation are uniform in the unit of interest, i.e., the properties are invariant in space. Moreover, the majority of the existing pressure transient models...

... involve the use of the assumption that the fluids in each grid block are in a state of thermodynamic equilibrium. In reality, the different fluid phases coexisting in each grid block may not be in equilibrium with each other because of insufficient contact time. A procedure has been developed...

... Abstract In surfactant flooding the form of the relative permeabilities at high capillary numbers has a crucial role in determining the transport of equilibrium phases through the reservoir. A conventional assumption is that a system which produces ultra-low interfacial tensions is close...

... of the underlying simplifying physical and analytic assumptions. For example, fracture solutions often contain a singularity which strongly affects near-field predictions of stress and strains, but which has a vanishingly small effect on far-field results. The physical simulations are intended co test...

... made in its synthesis, the same cannot be said of air drilling hydraulics. mud drilling hydrodynamic model drilling physics panicle drill string-wellbore annulus petroleum society air drilling equation air drilling hydraulic assumption weubore hydraulic mulriphase hydrodynamic model...

... problem. The introduction of a randomly distributed boundary condition is an assumption. Why does the assumption appear to work? What mechanism is responsible for the randomness? One obvious explanation for floods performed in porous media is the randomness associated with the flow paths of a porous...

..., if not impossible, to measure Klinkenberg and/or Forchheimer coefficients. It was recommended that these parameters not be accepted as valid unless the Klinkenberg or Reynolds number respectively was greater than 0.1. The model on which the previous paper was baaed contained these simplifying assumptions...

... injection costs can be important. For example, if a project requires one million cubic metres of NGL, each 1 percentile error in NGL requirement changes the solvent cost 0.2 - 1.0 million dollars. This emphasizes the need to avoid uncertainties associated with assumptions. The advent of densitometers...

... Abstract This paper reviews the traditional approach to tubular goods design with particular reference to tensional loading. Commonly used design factors are analysed to develop a basis for selecting the values to be used with more rigorous design assumptions. The loading conditions during...

... of the formation permeability, k, and the square of the fracture half-length, x f 2 . With no other source of information, it is not possible to determine k and x f separately. Solutions that do not use the planar flow assumption are more complicated 3–6 . There is no simple pressure-time relation to allow...

... that the solution of the linearized form of the equation is valid for both low and high permeability reservoirs. Introduction The flow of gas through porous media is represented by the well known diffusivity equation. In the past (Aronofsky and Jenkins, 1953) assumptions of ideal gas behaviour led to the use...

... Abstract A recent field project [sponsored by APIGEC (Alberta Petroleum Industry Government Environmental Committee) assessed basic source characteristic assumptions relevant to modelling sour gas pipeline ruptures and well blowouts. This paper describes the project and conclusions. A 3.2 km...

.... The interpretive tools used include conventional analysis techniques, type-curve matching and numerical simulation, It is shown that if the test is designed according to anticipated conditions and if care is taken to ensure that deviations from the implied assumptions are minimized and that the correct time span...

..., notably those of Cullender and Smith 1 and Sukkar and Cornell 2 . The efforts of the above two references and that of others led to two methods widely used in the literature and typified by the simplifying assumptions made to facilitate the solution of the resulting equations. One method approximates...