Exploration planning based on resource and risk assessment under the Sweet Areas method

UDK: 550.8
DOI: 10.24887/0028-2448-2021-4-40-43
Key words: Eastern Siberia, carbonate reservoir, estimation of resources, geological risks
Authors: A.I. Ikhsanov (RN-Exploration LLC, RF, Moscow), A.V. Svyaschenko (Taas-Yuryakh Neftegazodobycha LLC, RF, Irkutsk), A.V. Gaiduk (RN-Exploration LLC, RF, Moscow), N.A. Redkin (RN-Exploration LLC, RF, Moscow), D.N. Zhestkov (Rosneft Oil Company, RF, Moscow

In today's world, with the increasing cost of exploration, a more optimal and practical approach to its implementation is required. The "Sweet Areas" methodology for resource assessment, risk assessment and exploration programm is based on prioritizing promising objects by their degree of study and perspective. As part of the work at Rosneft Oil Company, using this technique, it was possible to form a pool of low-risk priority objects for inclusion in the exploration program. The author's approach makes it possible not only to rank promising objects by the number of resources and the degree of riskiness, but also to form an optimal exploration program aimed at quickly clarifying the properties and prospects of a new potential trap. Within the framework of the concept of "Sweet Areas," prospective objects are combined into 5 groups, separate in degree of study: SA1 - resources in the reserves circuits C1 (reserves prepared for production); SA2 - resources in the reserves circuits C2 (reserves prepared for production but requiring transfer to C1); SA3 - resources studied by seismic 3D, but not explored by drilling; SA4 - resources barred according to the seismic 2D (need 3D data) to clarify the geometry of objects; SA5 - resources conditionally localized based on regional trends and dependencies. One example is promising objects associated with foundation projections at the Srednebotuobinskoye oil-gas-condensate field. The analysis of seismic data materials, as well as the assessment of resources and risks using the Sweet Areas methodology, made it possible to determine the first promising search object within the Srednebotuobinskoye field on the territory of the Kurung area.

References

1. Mel'nikov R.S., Dan'ko E.A., Tverdokhlebov D.N., Kleshnin A.B., Interpretative quality control of seismic processing in seismic conditions of Eastern Siberia region (In Russ.), Nedropol'zovanie XXI vek, 2019, no. 6, pp. 34–41

2. ayduk A.V., Al'mendinger O.A., Formation conditions and criteria for prediction of areas of improved reservoir properties ancient Vendian-Cambrian reservoirs (for example, Danilovskiy license area (East Siberia)) (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2013, no. 1, pp. 10-13.

3. Gordeev Ya.I., Gayduk A.V., Mityukov A.V., Filichev A.A., The results of exploration of Rosneft’s license areas in the Irkutsk region for 10 years (In Russ.), Neftyanoe khozyaystvo = Oil industry, 2016, no. 11, pp. 15–17.

4. Gayduk A.V., Kashirina E.G., Red'kin N.A. et al., Regularities of development of perspective objects in carbonate Vendian-Cambrian sedimentary cover of the southern Siberian platform (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2016, no. 3, pp. 28–31.

5. Gayduk A.V., Fomin A.E., Tverdokhlebov D.N. et al., Oil and gas prospective facilities identification in the subsalt carbonate complex of Nepa-Botuoba anteclise as a result of historical 2D seismic data reprocessing and reinterpretation (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2016, no. 3, pp. 44–48.

In today's world, with the increasing cost of exploration, a more optimal and practical approach to its implementation is required. The "Sweet Areas" methodology for resource assessment, risk assessment and exploration programm is based on prioritizing promising objects by their degree of study and perspective. As part of the work at Rosneft Oil Company, using this technique, it was possible to form a pool of low-risk priority objects for inclusion in the exploration program. The author's approach makes it possible not only to rank promising objects by the number of resources and the degree of riskiness, but also to form an optimal exploration program aimed at quickly clarifying the properties and prospects of a new potential trap. Within the framework of the concept of "Sweet Areas," prospective objects are combined into 5 groups, separate in degree of study: SA1 - resources in the reserves circuits C1 (reserves prepared for production); SA2 - resources in the reserves circuits C2 (reserves prepared for production but requiring transfer to C1); SA3 - resources studied by seismic 3D, but not explored by drilling; SA4 - resources barred according to the seismic 2D (need 3D data) to clarify the geometry of objects; SA5 - resources conditionally localized based on regional trends and dependencies. One example is promising objects associated with foundation projections at the Srednebotuobinskoye oil-gas-condensate field. The analysis of seismic data materials, as well as the assessment of resources and risks using the Sweet Areas methodology, made it possible to determine the first promising search object within the Srednebotuobinskoye field on the territory of the Kurung area.

References

1. Mel'nikov R.S., Dan'ko E.A., Tverdokhlebov D.N., Kleshnin A.B., Interpretative quality control of seismic processing in seismic conditions of Eastern Siberia region (In Russ.), Nedropol'zovanie XXI vek, 2019, no. 6, pp. 34–41

2. ayduk A.V., Al'mendinger O.A., Formation conditions and criteria for prediction of areas of improved reservoir properties ancient Vendian-Cambrian reservoirs (for example, Danilovskiy license area (East Siberia)) (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2013, no. 1, pp. 10-13.

3. Gordeev Ya.I., Gayduk A.V., Mityukov A.V., Filichev A.A., The results of exploration of Rosneft’s license areas in the Irkutsk region for 10 years (In Russ.), Neftyanoe khozyaystvo = Oil industry, 2016, no. 11, pp. 15–17.

4. Gayduk A.V., Kashirina E.G., Red'kin N.A. et al., Regularities of development of perspective objects in carbonate Vendian-Cambrian sedimentary cover of the southern Siberian platform (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2016, no. 3, pp. 28–31.

5. Gayduk A.V., Fomin A.E., Tverdokhlebov D.N. et al., Oil and gas prospective facilities identification in the subsalt carbonate complex of Nepa-Botuoba anteclise as a result of historical 2D seismic data reprocessing and reinterpretation (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2016, no. 3, pp. 44–48.


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