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Reasoning of injection well flow back optimum period at low permeable HTR reserves formations of Tyumen suite

UDK: 622.276.432
DOI: 10.24887/0028-2448-2019-8-102-105
Key words: Jurassic sediments, Tyumen suite, hard to recover oil reserves, low-permeable reservoir, horizontal wells with multistage hydraulic fracturing, reservoir-pressure maintenance system efficiency, flow back optimum period
Authors: J.A. Plitkina (Tyumen Petroleum Research Center LLC, RF, Tyumen), D.P. Patrakov (Tyumen Petroleum Research Center LLC, RF, Tyumen), E.O. Kondratov (Tyumen Petroleum Research Center LLC, RF, Tyumen), D.V. Nikiforov (Tyumen Petroleum Research Center LLC, RF, Tyumen), M.A. Gladkikh (Tyumen Petroleum Research Center LLC, RF, Tyumen)

Tyumen suite is a low permeable reservoir with difficult geological aspects. Sensitivity of production well to work start reservoir pressure maintenance system in low permeable reservoir conditions is less than traditional reservoirs thus flow back oil production of injection wells is compare with efficiency of reservoir pressure maintenance system. In this connection injection wells flow back period issue is actual for technical and economics indexes enhance. The conversion to injection decisions are based on production rate decline analysis and results of hydrodynamic modeling. For this purpose was created hydrodynamic three phase model which segment was used for multiple option calculations. The goal of multiple option calculation is injection wells flow back optimum period definition. The efficiency of reservoir pressure maintenance system was estimated for each injection well with different flow back period. Each injection well has its own flow back optimum period. With conventional approach, that means many variations and computation which number depends on the number of injection wells and flow back period detail. This way is complicated for continuously updated geological information from drilling operations. An express method for injection wells flow back optimum period definition with minimal number of hydrodynamic calculations was proposed. Definition of reaction intensity between injection well and environment wells based method. The express method give closed to optimum result with significant reduction in labor costs.

References

1. Smagina T.N., Volkov M.A., Rybak V.K. et al., Issues of studying oil pools in Tyumen suite, Krasnoleninskoye field (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2010, no. 11, pp. 24–27.

2. Chusovitin A.A., Gnilitskiy R.A., Smirnov D.S. et al., Evolution of engineering solutions on the development of Tyumen suite oil reserves on an example of Krasnoleninskoye oilfield (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 5, pp. 54–58.

3. Shupik N.V., Povyshenie effektivnosti ploshchadnykh sistem zavodneniya nizkopronitsaemykh plastov Zapadnoy Sibiri (Improving the efficiency of pattern waterflooding of low-permeability formations in Western Siberia): thesis of candidate of technical science, Moscow, 2017.

4. Karpov V.B. et al., Tight oil field development optimization based on experience of Canadian analogs (In Russ.), SPE 182572-RU, 2016.

5. Galeev R.R., Zorin A.M., Kolonskikh A.V. et al., Optimal waterflood pattern selection with use of multiple fractured horizontal wells for development of the low-permeability formations (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2013, no. 10, pp. 62–65.

6. Baykov V.A., Zhdanov R.M., Mullagaliev T.I., Usmanov T.S., Selecting the optimal system design for the fields with low-permeability reservoirs (In Russ.), Neftegazovoe delo, 2011, no. 1, pp. 84–97.

Tyumen suite is a low permeable reservoir with difficult geological aspects. Sensitivity of production well to work start reservoir pressure maintenance system in low permeable reservoir conditions is less than traditional reservoirs thus flow back oil production of injection wells is compare with efficiency of reservoir pressure maintenance system. In this connection injection wells flow back period issue is actual for technical and economics indexes enhance. The conversion to injection decisions are based on production rate decline analysis and results of hydrodynamic modeling. For this purpose was created hydrodynamic three phase model which segment was used for multiple option calculations. The goal of multiple option calculation is injection wells flow back optimum period definition. The efficiency of reservoir pressure maintenance system was estimated for each injection well with different flow back period. Each injection well has its own flow back optimum period. With conventional approach, that means many variations and computation which number depends on the number of injection wells and flow back period detail. This way is complicated for continuously updated geological information from drilling operations. An express method for injection wells flow back optimum period definition with minimal number of hydrodynamic calculations was proposed. Definition of reaction intensity between injection well and environment wells based method. The express method give closed to optimum result with significant reduction in labor costs.

References

1. Smagina T.N., Volkov M.A., Rybak V.K. et al., Issues of studying oil pools in Tyumen suite, Krasnoleninskoye field (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2010, no. 11, pp. 24–27.

2. Chusovitin A.A., Gnilitskiy R.A., Smirnov D.S. et al., Evolution of engineering solutions on the development of Tyumen suite oil reserves on an example of Krasnoleninskoye oilfield (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 5, pp. 54–58.

3. Shupik N.V., Povyshenie effektivnosti ploshchadnykh sistem zavodneniya nizkopronitsaemykh plastov Zapadnoy Sibiri (Improving the efficiency of pattern waterflooding of low-permeability formations in Western Siberia): thesis of candidate of technical science, Moscow, 2017.

4. Karpov V.B. et al., Tight oil field development optimization based on experience of Canadian analogs (In Russ.), SPE 182572-RU, 2016.

5. Galeev R.R., Zorin A.M., Kolonskikh A.V. et al., Optimal waterflood pattern selection with use of multiple fractured horizontal wells for development of the low-permeability formations (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2013, no. 10, pp. 62–65.

6. Baykov V.A., Zhdanov R.M., Mullagaliev T.I., Usmanov T.S., Selecting the optimal system design for the fields with low-permeability reservoirs (In Russ.), Neftegazovoe delo, 2011, no. 1, pp. 84–97.


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