IMPLEMENTATION OF THE METHODOLOGY FOR CALCULATING THE PVT PROPERTIES OF A MULTIPHASE MULTICOMPONENT FLUID
UDC: 681.5:622.276+622.279
DOI: 10.33285/0132-2222-2021-2(571)-24-31
Authors:
BADAZHKOV D.V. 1,
GOLOVIN E.D. 1,
KOZLOV M.G. 1,2,
KURMANGALIEV R.Z.1,
LYKHIN P.A.1,
ULYANOV V.N. 1,2,
USOV E.V. 2,3
1 LLC "Novosibirsk Research and Development Center", Novosibirsk, Russian Federation
2 Novosibirsk State University, Novosibirsk, Russian Federation
3 IBRAE RAS, Novosibirsk, Russian Federation
Keywords: technological modes, well operation, Multiphase fluid, hydrate formation curve
Annotation:
Efficient operation of oil and gas fields is largely determined by the technological modes of raw material extraction, which ensure a long service life of wells, as well as a high level of water-flooding and a high oil recovery factor. The established technological mode of a well operation is understood as a set of the main parameters of its work, which can provide the production of oil, gas and gas condensate during a certain period of time, without taking into account possible complications in wells and ground infrastructure in the form of gas hydrates deposition on the pipe walls or paraffin formation. The results of laboratory studies of downhole fluid samples are the key parameters for the correct adjustment of the PVT-model, including those for plotting the phase diagram and calculating the hydrate formation curve, which makes it possible to more accurately localize possible complications associated with the deposition of gas hydrates in the well and surface infrastructure. A methodology has been developed that makes it possible to quickly calculate and build phase diagrams of a multiphase multicomponent fluid, taking into account the occurrence of some features near the critical point. It is based on the solution of the equation of components volatilities equality based on the Peng - Robinson equation of state using the Wilson correlation to estimate the initial values of the solution.
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