Structuring and preliminary selection of enhanced oil recovery methods for the current reservoir conditions of Block C2N, Joint Venture Petrovictoria (Venezuela)

Abstract

Global heavy oil reserves are the largest hydrocarbon resource in the world, with Venezuela's heavy oil reserves accounting for 87% of initial oil reserves; 258.3 out of 297.7 billion barrels. Primary oil production from such formations does not allow achieving a high recovery factor, which is only 5 to 10% due to the high viscosity of the reservoir oil and low mobility. The main purpose of the work is to determine the hierarchy and, with its help, preliminary selection of enhanced oil recovery (EOR) methods for the current reservoir conditions of the Carabobo 2 North block of the Petrovictoria joint venture, Venezuela. The methodology for selecting promising enhanced oil recovery methods for the created geological model of one of the objects for the potential application of enhanced oil recovery (EOR) methods in Venezuela (Orinoco Belt, Carabobo 2 North Block) is formed using applicability criteria. An EOR for an object based on the theory of fuzzy sets is proposed and evaluated. The main purpose of the work is to create a hierarchy and preliminary selection of methods for increasing oil recovery for the current conditions of the formation of the Carabobo 2 North block of the Petrovictoria joint venture, Venezuela. The method of selection (screening) of promising methods of increasing oil recovery for the created geological model of one of the objects of potential application of the Venezuelan EOR (North, Orinoco Belt), formed using the criteria of applicability and selection of the most promising EOR for the object, based on the theory of fuzzy sets, is presented and tested Keywords: heavy oil; enhanced oil recovery (EOR); EOR selection (screening); Orinoco Belt.