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A study of water coning control in oil well by injected barrier and downhole water sink technology

Bekbauov B., Kaltayev A.

Zeszyty Naukowe. Górnictwo / Politechnika Śląska

2009

z. 287

19-26

A numerical simulation of heavy oil recovery process developed in this work to investigate the time dependent development and dynamic shape of the water-oil interface around the well producing from a bottom-water-drive homogenous reservoir. The objectives of this study: developing a numerical model demonstrating water coning; placement of a drainage completion under the barrier, and perform a parametric study of a combined gel barrier placement with water drainage; ascertainment of the ability of a horizontal gel barrier to prevent water breakthrough; investigation of the performance of the gel barrier shut off technology associated with the Downhole Water Sink (DWS) technology; investigation the impermeable manmade barrier shut off and DWS methods' impact on the breakthrough time, and the critical rate; investigation of the effect of barrier radial size; demonstration of barrier-drainage system efficiency etc.

Przedstawiono numeryczny model procesu pozyskiwania ropy z jednorodnego złoża z wodą denną. Pozwala on prześledzić zmiany i rozwój granicy woda-ropa wokół otworu eksploatacyjnego. Uzyskane rezultaty potwierdzają przydatność modelu do analizy wpływu zastosowania bariery iniekcyjnej i technologii odwadniania dna otworu (DWS) na ograniczenie tendencji do tworzenia się stożków nawodnieniowych.

Simulation of mass-transfer process in porous media with complex shape : [abstract]

Ualyiev Z., Kaltayev A., Bekbauov B.

Wiertnictwo, Nafta, Gaz

2007

T. 24, z. 1

57-58

Some rare minerals and metals are extracted by underground leaching. Thus sorption extraction of minerals on mass-transfer devices with use ion-exchange resin is the most widespread method of productive solutions processing. Now wide application finds sorbing device which represents the cylindrical column, filled by a layer of ion-exchange resin in the form of spherical porous granules. Through a column from below upwards with the filtration velocity the solution containing sorbing a mineral is pumped over. Velocity of solution admission is calculated off on kinetic parameters. A cone barrier located before a submitting pipe is intended for achievement of uniform distribution of a solution across a column [fig.]. On an output from a column through certain time tests of a solution which are analyzed on the maintenance in them of mineral are selected. Sorption proceeds until concentration of mineral on an outlet from a column will not be equal some admissible value. After that the saturated layer of a sorbent being below by a mineral is unloaded. Sorbing device from above is supplemented with a fresh sorbent and process repeats. There are some questions, a degree of an involvement of a sorbent in mass-transfer process (especially, in a transverse direction of a column) and change of column resistance depending on the size and forms of cone barrier, influence of dispersive and kinetic characteristics on thickness of the saturated layer.