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Features of development of oil fields complicated by high conductivity layers

UDK: 622.276.11.4
DOI: 10.24887/0028-2448-2019-12-38-43
Key words: horizontal wells, multiple-fractured horizontal wells, production logging, indicator studies, low-permeability and hyper-low-permeable reservoirs, production monitoring, distributed fiber-optic systems
Authors: M.M. Khasanov (Gazprom Neft PJSC, RF, Saint-Petersburg), A.I. Ipatov (Gazpromneft NTC LLC, RF, Saint-Petersburg), E.A. Jukovskaia (Gazpromneft NTC LLC, RF, Saint-Petersburg), M.I. Kremenetskiy (Gazpromneft NTC LLC, RF, Saint-Petersburg), D.A. Listoikin (Gazpromneft NTC LLC, RF, Saint-Petersburg)

Last years there has been a trend in Russia to develop hard-to-recover oil reserves with low-permeability (less than (1-2)⋅10-3 mkm2) and hyper-low-permeable ((0.1-0.001)⋅10-3 mkm2) fields. The latter primarily include Bazhenov, Domanic and Achimov fields. As a result of the extremely low natural filtration properties of these reservoirs, their development at the present stage of technological development provides for the mandatory completion with multiple-fractured horizontal wells (MFHW). Experience in the development of layers of the specified type for Gazprom Neft PJSC shows that the highest oil production rate is achieved if the MFHW system reveals not only the low-permeability rock matrix, but also captures the highly conductive (typically fractured) streaks, that take place in some cases. The difference in the permeability of such highly conductive layers and the hyper-low-permeable matrix of the host rocks can be very significant, for example, up to 105-106. Highly conductive layers in the section associated with the achievement of high initial oil flow rates in new wells, in the process of further development, negative consequences may arise as a result of premature (and even worse – unpredictable) gas and water breakthroughs through narrow fractured layers. The authors dissertate upon how to take into account the risks of loss of well productivity as a consequence of the pronounced geological heterogeneity of these fields, even if the scale of the impact of this heterogeneity is still difficult to assess by modern research methods.

In this regard, this paper analyzes some of the results of core, logging, well-testing and indicator studies with the allocation of characteristic features indicating the presence of local highly conductive layers in the section of the oil complex. In addition, the authors proposed some control solutions to minimize the negative consequences of the development of such heterogeneous fields.

References

1. Bilinchuk A.V., Ipatov A.I., Sitnikov A.V. et al., Evolution of production logging in low permeability reservoirs at horizontal wells, multiple-fractured horizontal wells and multilateral wells. Gazprom Neft experience (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 12, pp. 34–37.

2. Kremenetskiy M.I., Ipatov A.I., Statsionarnyy gidrodinamiko-geofizicheskiy monitoring razrabotki mestorozhdeniy nefti i gaza (Stationary hydrodynamic-geophysical monitoring of the development of oil and gas fields), Moscow – Izhevsk: Publ.of Institute of Computer Science, 2018, 796 p.

3. Chukhlantseva E.R., Kompleksirovanie metodov litofatsial'nogo i geologo-geofizicheskogo modelirovaniya v tselyakh geometrizatsii verkhnesenomanskikh zalezhey Messoyakhskoy zony neftegazonakopleniya (Integration of lithofacial and geological-geophysical modeling methods for geometrization of the Upper Senomanian deposits of the Messoyakha oil and gas accumulation zone): thesis of candidate of geological and mineralogical science, Tomsk, 2016.

4. Grabovskaya F.R., Zhukov V.V., Zagranovskaya D.E., Structure and formation conditions of the Bazhenovo horizon in the Pal’yanovo Area, West Siberia (In Russ.), Litologiya i poleznye iskopaemye=Lithology and Mineral Resources, 2018, no. 3, pp. 195–206.

5. Vol'pin S.G., Lomakina O.V., Afanaskin I.V., Osobennosti geologicheskogo stroeniya i energeticheskogo sostoyaniya zalezhi v otlozheniyakh bazhenovskoy svity (Features of the geological structure and energy status of the deposits in the sediments of the Bazhenov formation), Proceedings of international scientific and technical conference Geopetrol 2014, Exploration and production of oil and natural gas reservoirs – new technologies, new challenges, Krakow, 15–18.09.14, pp. 85–95.

6. Sugaipov D.A., Lyapin V.V., Reshetnikov D.A. et al., Selecting optimal technology for wells completion in the oil rims of continental genesis on the example of layers PK1-3 of the Vostochno-Messoyakhskoye and Tazovskoye fields (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 4, pp. 66–69.

7. Listoykin D.A., Ridel' A.A., Kovalenko I.V., Well test as an adjustment tool for geological modelling and assessments of the impact of underlying waters for the development of the PK1-3 layer at Vostochno-Messoyakhskoye field (In Russ.), PRONEFT''. Professional'no o nefti, 2018, no. 1(7), pp. 52–57.

8. Ipatov A.I., Kremenetskiy M.I., Geofizicheskiy i gidrodinamicheskiy kontrol' razrabotki mestorozhdeniy uglevodorodov (Geophysical and hydrodynamic control of development of hydrocarbon deposits), Moscow-Izhevsk: RKhD Publ., 2005, 780 p.

9. Ushmaev O.S., Chameev I.L., Bazhenov D.Yu., Artamonov A.A., EOR gas re-injection optimization at an oil, gas and condensate field (In Russ.), PRONEFT''. Professional'no o nefti, 2016, no. 2, pp. 54–60.

Last years there has been a trend in Russia to develop hard-to-recover oil reserves with low-permeability (less than (1-2)⋅10-3 mkm2) and hyper-low-permeable ((0.1-0.001)⋅10-3 mkm2) fields. The latter primarily include Bazhenov, Domanic and Achimov fields. As a result of the extremely low natural filtration properties of these reservoirs, their development at the present stage of technological development provides for the mandatory completion with multiple-fractured horizontal wells (MFHW). Experience in the development of layers of the specified type for Gazprom Neft PJSC shows that the highest oil production rate is achieved if the MFHW system reveals not only the low-permeability rock matrix, but also captures the highly conductive (typically fractured) streaks, that take place in some cases. The difference in the permeability of such highly conductive layers and the hyper-low-permeable matrix of the host rocks can be very significant, for example, up to 105-106. Highly conductive layers in the section associated with the achievement of high initial oil flow rates in new wells, in the process of further development, negative consequences may arise as a result of premature (and even worse – unpredictable) gas and water breakthroughs through narrow fractured layers. The authors dissertate upon how to take into account the risks of loss of well productivity as a consequence of the pronounced geological heterogeneity of these fields, even if the scale of the impact of this heterogeneity is still difficult to assess by modern research methods.

In this regard, this paper analyzes some of the results of core, logging, well-testing and indicator studies with the allocation of characteristic features indicating the presence of local highly conductive layers in the section of the oil complex. In addition, the authors proposed some control solutions to minimize the negative consequences of the development of such heterogeneous fields.

References

1. Bilinchuk A.V., Ipatov A.I., Sitnikov A.V. et al., Evolution of production logging in low permeability reservoirs at horizontal wells, multiple-fractured horizontal wells and multilateral wells. Gazprom Neft experience (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 12, pp. 34–37.

2. Kremenetskiy M.I., Ipatov A.I., Statsionarnyy gidrodinamiko-geofizicheskiy monitoring razrabotki mestorozhdeniy nefti i gaza (Stationary hydrodynamic-geophysical monitoring of the development of oil and gas fields), Moscow – Izhevsk: Publ.of Institute of Computer Science, 2018, 796 p.

3. Chukhlantseva E.R., Kompleksirovanie metodov litofatsial'nogo i geologo-geofizicheskogo modelirovaniya v tselyakh geometrizatsii verkhnesenomanskikh zalezhey Messoyakhskoy zony neftegazonakopleniya (Integration of lithofacial and geological-geophysical modeling methods for geometrization of the Upper Senomanian deposits of the Messoyakha oil and gas accumulation zone): thesis of candidate of geological and mineralogical science, Tomsk, 2016.

4. Grabovskaya F.R., Zhukov V.V., Zagranovskaya D.E., Structure and formation conditions of the Bazhenovo horizon in the Pal’yanovo Area, West Siberia (In Russ.), Litologiya i poleznye iskopaemye=Lithology and Mineral Resources, 2018, no. 3, pp. 195–206.

5. Vol'pin S.G., Lomakina O.V., Afanaskin I.V., Osobennosti geologicheskogo stroeniya i energeticheskogo sostoyaniya zalezhi v otlozheniyakh bazhenovskoy svity (Features of the geological structure and energy status of the deposits in the sediments of the Bazhenov formation), Proceedings of international scientific and technical conference Geopetrol 2014, Exploration and production of oil and natural gas reservoirs – new technologies, new challenges, Krakow, 15–18.09.14, pp. 85–95.

6. Sugaipov D.A., Lyapin V.V., Reshetnikov D.A. et al., Selecting optimal technology for wells completion in the oil rims of continental genesis on the example of layers PK1-3 of the Vostochno-Messoyakhskoye and Tazovskoye fields (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 4, pp. 66–69.

7. Listoykin D.A., Ridel' A.A., Kovalenko I.V., Well test as an adjustment tool for geological modelling and assessments of the impact of underlying waters for the development of the PK1-3 layer at Vostochno-Messoyakhskoye field (In Russ.), PRONEFT''. Professional'no o nefti, 2018, no. 1(7), pp. 52–57.

8. Ipatov A.I., Kremenetskiy M.I., Geofizicheskiy i gidrodinamicheskiy kontrol' razrabotki mestorozhdeniy uglevodorodov (Geophysical and hydrodynamic control of development of hydrocarbon deposits), Moscow-Izhevsk: RKhD Publ., 2005, 780 p.

9. Ushmaev O.S., Chameev I.L., Bazhenov D.Yu., Artamonov A.A., EOR gas re-injection optimization at an oil, gas and condensate field (In Russ.), PRONEFT''. Professional'no o nefti, 2016, no. 2, pp. 54–60.


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