True errors of the calculation of absolute marks in deviating holes and methods of their estimation

Authors: A.M. Dubina, P.A. Shakhov, M.V. Chebykina (VNIIneft OAO, RF, Moscow)

Key words: inclinometry, error, gyroscopes, estimation of reserves, geological modeling.

The errors of calculation of absolute marks by different ways are estimated by the example of several fields. It is shown that the use of modern magnetic inclinometers even at high angles of inclination of the wellbore final error of the calculation of absolute marks is not so great as to exclude those wells from structural imagings at geological models creation and performing calculation of hydrocarbons reserves.

References

1. Metodicheskie rekomendatsii po podschetu geologicheskikh zapasov ob"emnym metodom (Guidelines for the estimation of geological reserves volumetric method), Moscow-Tver: Publ. of VNIGNI, NPTs “Tver’geofizika, 2003.

2. Denisov S.B., Bilibin S.I., D"yakonova T.F.et al., Karotazhnik, 2001, no. 86, 2001, pp. 113-124.

3. Levyant V.B., Ampilov Yu.P., Glogovskiy V.M., Kolesov V.V., Korostyshevskiy M.B., Ptetsov S.N., Metodicheskie rekomendatsii po ispol'zovaniyu dannykh seysmorazvedki (2D, 3D) dlya podscheta zapasov nefti i gaza (Guidelines on the use of seismic data (2D, 3D) for the calculation oil and gas reserves), Moscow: Publ. of OAO “TsGE”, 2006, 40 p.

4. Wolff C.J.M., Wardt J.P., Borehole position uncertaintly – analysis of measuring methods and derivation of systematic error model, Jornal of Petroleum Technology, December 1981, pp. 2339-2350.

5. Kovalenko K.V., Vestnik Assotsiatsii burovykh podryadchikov, 2011, no. 4, pp. 10-13.

6. Ekseth R., Kovalenko K., Weston J.L., The reability problem related to directional survey data, IADC/SPE 103734, 2006.

7. Williamson H.S., Accuracy prediction for directional MWD, SPE 56702, 1999.

8. Williamson H.S., Accuracy prediction for directional measurement while drilling, SPE 67616, 2000.

Key words: inclinometry, error, gyroscopes, estimation of reserves, geological modeling.

The errors of calculation of absolute marks by different ways are estimated by the example of several fields. It is shown that the use of modern magnetic inclinometers even at high angles of inclination of the wellbore final error of the calculation of absolute marks is not so great as to exclude those wells from structural imagings at geological models creation and performing calculation of hydrocarbons reserves.

References

1. Metodicheskie rekomendatsii po podschetu geologicheskikh zapasov ob"emnym metodom (Guidelines for the estimation of geological reserves volumetric method), Moscow-Tver: Publ. of VNIGNI, NPTs “Tver’geofizika, 2003.

2. Denisov S.B., Bilibin S.I., D"yakonova T.F.et al., Karotazhnik, 2001, no. 86, 2001, pp. 113-124.

3. Levyant V.B., Ampilov Yu.P., Glogovskiy V.M., Kolesov V.V., Korostyshevskiy M.B., Ptetsov S.N., Metodicheskie rekomendatsii po ispol'zovaniyu dannykh seysmorazvedki (2D, 3D) dlya podscheta zapasov nefti i gaza (Guidelines on the use of seismic data (2D, 3D) for the calculation oil and gas reserves), Moscow: Publ. of OAO “TsGE”, 2006, 40 p.

4. Wolff C.J.M., Wardt J.P., Borehole position uncertaintly – analysis of measuring methods and derivation of systematic error model, Jornal of Petroleum Technology, December 1981, pp. 2339-2350.

5. Kovalenko K.V., Vestnik Assotsiatsii burovykh podryadchikov, 2011, no. 4, pp. 10-13.

6. Ekseth R., Kovalenko K., Weston J.L., The reability problem related to directional survey data, IADC/SPE 103734, 2006.

7. Williamson H.S., Accuracy prediction for directional MWD, SPE 56702, 1999.

8. Williamson H.S., Accuracy prediction for directional measurement while drilling, SPE 67616, 2000.


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