Improving the efficiency of monitoring oil fields development on the basis of standard displacement characteristics

UDK: 622.276.1/.4
DOI: 10.24887/0028-2448-2019-4-44-48
Key words: model characteristic of oil displacement, relative permeability, geological-statistical cross-section, Buckley – Leverett function, displacement efficiency, oil recovery factor, effective damping, aquifer
Authors: M.S. Antonov (RN-UfaNIPIneft LLC, RF, Ufa; Ufa State Petroleum Technological University, RF, Ufa), G.R. Gumerova (RN-UfaNIPIneft LLC, RF, Ufa), Iu.I. Rafikova (Ufa State Petroleum Technological University, RF, Ufa), N.N. Salienko (Slavneft-Megionneftegas LLC, RF, Megion), R.V. Kevlich (Slavneft-Megionneftegas LLC, RF, Megion), P.I. Chermyanin (RN-UfaNIPIneft LLC, RF, Ufa; RN-BashNIPIneft LLC, RF, Ufa)

This article focuses on choosing the optimal approach to monitoring and analyzing field development in order to improve the efficiency and quality of decisions to optimize development systems. The authors propose to evaluate the water cutting of oil deposits using a setup of standard displacement characteristics. To construct this characteristic of desaturation we use data from penetration tests of core sample (relative permeability, residual oil and water saturation coefficients depending on the reservoir properties), geological - statistic section of the reservoir and development parameters of the field. The joint account of these factors allows us to estimate the differentiation of the attitude of the waterflooding of the layers both in the lateral and in the vertical section. The analysis of the energy state of the development unit is proposed to be carried out using the assessment of the aquifer activity through the material balance. Accounting aquifer allows to evaluate outflows, inflows from the external reservoir boundary, which gives a complete picture of the effectiveness of waterflooding in terms of maintaining reservoir pressure. The reliability of the constructed standard displacement characteristic was estimated from the displacement characteristic obtained using geological and hydrodynamic modeling. Based on the results, was concluded that they were sufficiently correlated under the condition that the formation pressure maintenance system was formed. The technique is used for analyzing and monitoring oil fields development, namely: determining the attitude of the waterflooding the object, the development unit, the dynamics of cutting speed based on the analysis of changes in tilt angles to the graphs and the attitude of reserve recovery. A combined analysis of reserve recovery on the basis of the standard displacement characteristics and the analysis of waterflooding efficiency allows to take the necessary measures according to the formed decision-making matrix.

References

1. Patent no. 2480584 RF, MPK E21B 49/00, E21B 47/00, Method for online forecasting of main parameters of oil deposits development, Inventors: Poplygin V.V., Galkin S.V., Ivanov S.A.

2. Akhmetova Z.R., Strukturizatsiya ostatochnoy neftenasyshchennosti dlya obosnovaniya tekhnologii doizvlecheniya nefti (Structurization of residual oil saturation to substantiate the technology of oil recovery): thesis of candidate of technical science, Moscow, 2016.

3. Dake L.P., The practice of reservoir engineering, Elsevier Science, 2001, 570 p.

4. Wolcott D., Applied waterflood field development, Publ. of Schlumberger, 2001, 142 p.

This article focuses on choosing the optimal approach to monitoring and analyzing field development in order to improve the efficiency and quality of decisions to optimize development systems. The authors propose to evaluate the water cutting of oil deposits using a setup of standard displacement characteristics. To construct this characteristic of desaturation we use data from penetration tests of core sample (relative permeability, residual oil and water saturation coefficients depending on the reservoir properties), geological - statistic section of the reservoir and development parameters of the field. The joint account of these factors allows us to estimate the differentiation of the attitude of the waterflooding of the layers both in the lateral and in the vertical section. The analysis of the energy state of the development unit is proposed to be carried out using the assessment of the aquifer activity through the material balance. Accounting aquifer allows to evaluate outflows, inflows from the external reservoir boundary, which gives a complete picture of the effectiveness of waterflooding in terms of maintaining reservoir pressure. The reliability of the constructed standard displacement characteristic was estimated from the displacement characteristic obtained using geological and hydrodynamic modeling. Based on the results, was concluded that they were sufficiently correlated under the condition that the formation pressure maintenance system was formed. The technique is used for analyzing and monitoring oil fields development, namely: determining the attitude of the waterflooding the object, the development unit, the dynamics of cutting speed based on the analysis of changes in tilt angles to the graphs and the attitude of reserve recovery. A combined analysis of reserve recovery on the basis of the standard displacement characteristics and the analysis of waterflooding efficiency allows to take the necessary measures according to the formed decision-making matrix.

References

1. Patent no. 2480584 RF, MPK E21B 49/00, E21B 47/00, Method for online forecasting of main parameters of oil deposits development, Inventors: Poplygin V.V., Galkin S.V., Ivanov S.A.

2. Akhmetova Z.R., Strukturizatsiya ostatochnoy neftenasyshchennosti dlya obosnovaniya tekhnologii doizvlecheniya nefti (Structurization of residual oil saturation to substantiate the technology of oil recovery): thesis of candidate of technical science, Moscow, 2016.

3. Dake L.P., The practice of reservoir engineering, Elsevier Science, 2001, 570 p.

4. Wolcott D., Applied waterflood field development, Publ. of Schlumberger, 2001, 142 p.



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