oil-gas-petroleum-engineering-2018-accepted

Page 40

Notes:

allied

academies

Journal of Industrial and Environmental Chemistry | Volume 2

December 06 -07, 2018 | Dubai, UAE

Pet roleum Engineer ing, Oil and Gas

International Conference on

Joint Event

Production reassignment and reserves distribution on a giant shared reservoir

Jorge Barboza

VYP Consultores SA, Argentina

n the conventional scheme of the oil industry, exploitation

concessions are granted by areas delimited on the surface

but at the subsoil level they often fail to cover the entire volume

of the reservoir, even more in large deposits, consequently the

reservoir spread underground through various concession

areas and it is therefore managed by multiple operators, under

this situation the accumulation is known as shared reservoir. On

a shared reservoir original oil in place and reserves estimation

are made according to the volume of the reservoir contained

within the concession, however oil production does not obey

limits or estimations, because oil will move freely to zones of

greater drainage, this means that throughout the productive

life of a shared reservoir the recoveries for each operator can be

very different from the estimates or assigned reserves, resulting

in a beneficial situation to one operator and negatively affecting

another. This document describes and deals with a review of

reservesmadeonagiantoil reservoirmanagedby twooperators

but with preferential drainage to one area, in which cumulative

oil production differs greatly from the recoverable volumes

calculated for each concession area, creating a complex reserve

estimation scenario due to the impossibility of performing a

conventional calculation for the remaining volumes available

for each operator. To solve this situation a methodology was

applied to reallocate the cumulative production between the

two areas and a distribution of the remaining reserves was

achieved based on production history and forecasts, resulting

satisfactory for both parties.

Oil & Gas 2018 &

Petroleum Engineering 2018, Volume 2

DOI: 10.4066/2591-7331-C2-006