Selection methodology for screening evaluation of EOR methods

Abstract

The choice of enhanced oil recovery (EOR) methods for specific reservoir conditions is one of the most difficult tasks for a reservoir engineer. Taber (Taber, 1980; Taber et al., 1997a,b) gave informative overview of EOR research history. He also offered technical screening guides for EOR nowadays known as Taber's tables. It should be noted that the approach recommended by Taber could not be taken as strong mathematical ranking of EOR methods. The authors propose an approach for EOR methods selection, based on fuzzy logic, possibility theory, and Bayesian inference mechanisms. Rankings were made by way of best EOR method selection for every criteria using fuzzy intervals comparison. Final correction of each EOR selection coefficient was performed by the generalized Bayesian inference mechanism. Application of this methodology for reservoir conditions of Alberta oil field, as well as the offshore field "Guneshli, " allowed for choosing the most effective EOR method, confirming the accuracy and feasibility of the proposed approach. Simple calculation (not more than five iterations) allows the automation of the process of selecting the most effective EOR method for a particular field.

Improvement of oil recovery factor from geological perspectives

“…The study of EOR methods was based on observations of the database that is presented by 652 projects around the world. This approach was conducted in order to reduce the probability of error in the EOR selection criteria process and as a result, pick up suitable EOR techniques for Tevlinsko-Russinskoe oil field [9][10][11][12][13].…”

Comprehensive evaluation of waterflooding front in low‐permeability reservoir

“…By applying this scheme to the real oilfield, it was concluded that the method could effectively avoid development problems caused by the general scheme adjustment, and accurate prediction and adjustment were achieved to improve the production effect. 9 Yang Zhengming et al 10 pointed out that the effect of the starting pressure shall be considered when analyzing the production decline, the water cut, and the waterflooding characteristic curve of low-permeability reservoirs. Wang Jianzhong, et al 11 studied the law of the water cut rise in various reservoirs providing an important theoretical reference for the formulation and adjustment of the oilfield development policy with strong practicability.…”

Acid-based cement slurry with controllable properties

“…Intensity of sand in the wells reduces the ultimate recovery and leads to a large overhead cost for production, transportation and preparation of water, as well as equipment repair. At the same time wasteful consumption of energy reduces overall efficiency of the development of deposits [1][2][3][4][5][6][7][8][9][10][11][12].…”