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Determination of reservoir filtration system model of R. Trebs field using dynamic well tests

Authors: A.I. Fedorov, R.M. Nabiullin (Bashneft-Polus LLC, RF, Ufa), V.N. Fedorov, E.M. Salimgareeva, A.Sh. Akberova (BashNIPIneft LLC, RF, Ufa)

Key words: reservoir filtration system model, carbonates, double porosity, open hole, pressure build-up

The paper presents features in determination of reservoir filtration system model of carbonate oil fields using dynamic well tests analysis. It is shown that pressure build-up is characterized by long-term wellbore storage covering over informative part of log-log plot. Authors suggest using drillstem test results to determine filtration model, for R.Trebs field it has determined as dual porosity model. Based on the drillstem test analysis storativity ratio and interporosity ratio for the Lower Devonian Ovinparma formation (D1op1) were calculated. Drillstem tests showed high informativity for reservoir filtration system model determination.
References
1. Chernitskiy A.V., Geologicheskoe modelirovanie neftyanykh zalezhey massivnogo tipa v karbonatnykh treshchinovatykh kollektorakh (Geological
modeling of massive oil deposits in carbonate fractured reservoirs), Moscow:
Publ. of RMNTK Nefteotdacha, 2002, 254 p.
2. Shumatbaev K.D., Kuchurina O.E., Shishlova L.M., Integrated analysis of
void space in carbonates by the example of R. Trebs oil field (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 6, pp. 91-93.
3. Nelson R.A., Geologic analysis of naturally fractured reservoirs, Houston:
GPP, 2001, 351 p.
4. Narr W., Schechter D.W., Thompson L.B., Naturally fractured reservoir characterization, SPE, Richardson, Texas, 2006, 112 p.
5. Bourdet D., Well test analysis: the use of advanced interpretation models,
Elsevier, 2002, 426 p.
6. Baykov V.A., Davletbaev A.Ya., Emchenko O.V., Zaynulin A.V., Fracturebased strategies for carbonate reservoir development, SPE 136248, 2010.
7. Pointe P.L., Wallmann P.C., Follin S., Continuum modeling of fractured rock masses: Is it useful, Eurock, 1996, pp. 343-350.
8. Horne R.N., Modern well test analysis, USA, Palo Alto: Petroway Inc., 1995, 271 p.

Key words: reservoir filtration system model, carbonates, double porosity, open hole, pressure build-up

The paper presents features in determination of reservoir filtration system model of carbonate oil fields using dynamic well tests analysis. It is shown that pressure build-up is characterized by long-term wellbore storage covering over informative part of log-log plot. Authors suggest using drillstem test results to determine filtration model, for R.Trebs field it has determined as dual porosity model. Based on the drillstem test analysis storativity ratio and interporosity ratio for the Lower Devonian Ovinparma formation (D1op1) were calculated. Drillstem tests showed high informativity for reservoir filtration system model determination.
References
1. Chernitskiy A.V., Geologicheskoe modelirovanie neftyanykh zalezhey massivnogo tipa v karbonatnykh treshchinovatykh kollektorakh (Geological
modeling of massive oil deposits in carbonate fractured reservoirs), Moscow:
Publ. of RMNTK Nefteotdacha, 2002, 254 p.
2. Shumatbaev K.D., Kuchurina O.E., Shishlova L.M., Integrated analysis of
void space in carbonates by the example of R. Trebs oil field (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 6, pp. 91-93.
3. Nelson R.A., Geologic analysis of naturally fractured reservoirs, Houston:
GPP, 2001, 351 p.
4. Narr W., Schechter D.W., Thompson L.B., Naturally fractured reservoir characterization, SPE, Richardson, Texas, 2006, 112 p.
5. Bourdet D., Well test analysis: the use of advanced interpretation models,
Elsevier, 2002, 426 p.
6. Baykov V.A., Davletbaev A.Ya., Emchenko O.V., Zaynulin A.V., Fracturebased strategies for carbonate reservoir development, SPE 136248, 2010.
7. Pointe P.L., Wallmann P.C., Follin S., Continuum modeling of fractured rock masses: Is it useful, Eurock, 1996, pp. 343-350.
8. Horne R.N., Modern well test analysis, USA, Palo Alto: Petroway Inc., 1995, 271 p.


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