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Increase in accuracy of well position in space measurements by the telemetry system

UDK: 622.24.05:681.5
DOI: 10.24887/0028-2448-2017-12-102-104
Key words: telemetry system, fiber optic gyroscope, accelerometer, vibrations, rotary steerable system
Authors: S.N. Krivoshchekov, M.S. Turbakov, A.A. Melekhin, I.V. Dombrovsky, A.V. Trubitsyn (Perm National Research Polytechnic University, RF, Perm), I.I. Nestertov (Mikont-Engineering LLC, RF, Perm)

The paper reviews the research on testing of the telemetry system block in the conditions of Perm region wells. There are axial, radial and torsional vibrations of the drill string that permanently occur during the drilling and lead to a sharp decrease in the accuracy of measurements of accelerometers. Telemetry systems used together with rotary steerable systems work in more extreme conditions. The major part of drill string rotation creates significant centrifugal forces affecting the readings of accelerometers. The navigational block of the telemetry system consists of a strapdown inertial navigation system and geostationary system. Navigational system is built on the basis of three orthogonally located fiber optic gyroscopes and quartz accelerometers. Gyroscopes serve to measure the azimuth angle and sufficiently replace the magnetometers. Accelerometers are used to measure the zenith angle. The geostationary system includes the base with sensors, electric motor, two shock absorbers mounted on it. The geostationary system is tested on a stand where various rotational speeds are set. The effectiveness of geostationary system is proved by tests where gyroscopes and accelerometers do not increase the error of readings and do not lose initial reference point at rotation of 200 rpm. A strapdown inertial navigation system is tested for the influence of high temperatures and vibrations. Temperature tests in a thermal chamber did not show an increase in the error of sensors at temperatures up to 90C. Effectiveness of shock absorbers and working capacity of the system under the influence with a frequency of up to 200 Hz and acceleration up to 10g is confirmed by tests on the shaker stand.

References

1. Shevchenko I.A., Urgency of the use of downhole telemetry systems for drilling wells with a large step out for the development of offshore oil and gas fields (In Russ.), Nauchnaya perspektiva, 2014, no. 2, pp. 107-111.

2. Noureldin A., Irvine-Halliday D., Mintchev M.P., Measurement-while-drilling surveying of highly inclined and horizontal well sections utilizing single-axis gyro sensing system, Measurement Science and Technology,  2004, V. 15 (12), pp. 2426-2434, DOI 10.1088/0957-0233/15/12/012

3. Zhang C., Wang L., Gao S. et al.,  Vibration noise modeling for measurement while drilling system based on FOGs, Sensors (Switzerland), 2017, V. 10, p. 2367, DOI 10.3390/s17102367.

4. Fedorov V.N., Sheshukov A.I., Meshkov V.M., Hydrodynamic studies of horizontal wells (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2002, no. 8, pp. 92-94.

5. Fatikhov S.Z., Fedorov V.N., Opyt ispolzovaniya telemetricheskikh sistem na mestorozhdeniyakh Respubliki Bashkortostan (Experience in the use of telemetric systems in the fields of the Republic of Bashkortostan), Collected papers Fiziko-khimicheskaya gidrodinamika (Physico-chemical hydrodynamics), Proceedings of The first summer school-conference, 2016, pp. 174-183.

6. Chernyshov S.E., Features of directional wells construction considering the size of buffer zones on the Verkhnekamskoye potassium salt deposit (In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2006, no. 1, pp. 137-143.

7. Nikolaev N.I., Kozhevnikov E.V., Enhancing the cementing quality of the well with horizontal profile (In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2014, no. 11, pp. 29-37, DOI 10.15593/2224-9923/2014.11.3

8. Poplygina I.S., Opportunities of improved development of high-viscosity oil pool in Perm kray (In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2014, no. 11, pp. 57-66, DOI 10.15593/2224-9923/2014.11.6

9. Talipov R.N., Mukhametshin A.A., Technology of drilling two additional bores from horizontal part of directional well (In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2012, no. 2, pp. 45-54.

10. Krysin N.I., Dombrovskiy I.V., Krivoshchekov S.N. et al., Study of fiber optic gyroscopes for telemetry systems of well trajectory monitoring (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 12, pp. 102-105.

11. Krivoshchekov S.N., Melekhin A.A., Turbakov M.S. et al., Development of a telemetric system for monitoring downhole parameters in the course of wells construction (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2017, no. 9, pp. 86-88.

12. Kychkin A.V., Volodin V.D., Sharonov A.A. et al., The synthesis of the hardware and software system structure for remote monitoring and control of the wellbore trajectory while drilling by rotary steerable system (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 11, pp. 128-132.

13. Tereshin V.G., Ivanova G.A., The choice of dynamically tuned and fiber-optic gyroscopes for directional survey (In Russ.), Vestnik UGATU, 2012, no. 1(46), pp. 62-69.

14. Korkishko Yu.N., Fedorov V.A., Prilutskiy V.E. et al., Fiber-optic gyroscopes, blocks of sensitive elements and free-of-charge inertial navigation systems based on them (In Russ.), Foton-ekspress, 2013, no. 6 (110), pp. 44-45.

The paper reviews the research on testing of the telemetry system block in the conditions of Perm region wells. There are axial, radial and torsional vibrations of the drill string that permanently occur during the drilling and lead to a sharp decrease in the accuracy of measurements of accelerometers. Telemetry systems used together with rotary steerable systems work in more extreme conditions. The major part of drill string rotation creates significant centrifugal forces affecting the readings of accelerometers. The navigational block of the telemetry system consists of a strapdown inertial navigation system and geostationary system. Navigational system is built on the basis of three orthogonally located fiber optic gyroscopes and quartz accelerometers. Gyroscopes serve to measure the azimuth angle and sufficiently replace the magnetometers. Accelerometers are used to measure the zenith angle. The geostationary system includes the base with sensors, electric motor, two shock absorbers mounted on it. The geostationary system is tested on a stand where various rotational speeds are set. The effectiveness of geostationary system is proved by tests where gyroscopes and accelerometers do not increase the error of readings and do not lose initial reference point at rotation of 200 rpm. A strapdown inertial navigation system is tested for the influence of high temperatures and vibrations. Temperature tests in a thermal chamber did not show an increase in the error of sensors at temperatures up to 90C. Effectiveness of shock absorbers and working capacity of the system under the influence with a frequency of up to 200 Hz and acceleration up to 10g is confirmed by tests on the shaker stand.

References

1. Shevchenko I.A., Urgency of the use of downhole telemetry systems for drilling wells with a large step out for the development of offshore oil and gas fields (In Russ.), Nauchnaya perspektiva, 2014, no. 2, pp. 107-111.

2. Noureldin A., Irvine-Halliday D., Mintchev M.P., Measurement-while-drilling surveying of highly inclined and horizontal well sections utilizing single-axis gyro sensing system, Measurement Science and Technology,  2004, V. 15 (12), pp. 2426-2434, DOI 10.1088/0957-0233/15/12/012

3. Zhang C., Wang L., Gao S. et al.,  Vibration noise modeling for measurement while drilling system based on FOGs, Sensors (Switzerland), 2017, V. 10, p. 2367, DOI 10.3390/s17102367.

4. Fedorov V.N., Sheshukov A.I., Meshkov V.M., Hydrodynamic studies of horizontal wells (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2002, no. 8, pp. 92-94.

5. Fatikhov S.Z., Fedorov V.N., Opyt ispolzovaniya telemetricheskikh sistem na mestorozhdeniyakh Respubliki Bashkortostan (Experience in the use of telemetric systems in the fields of the Republic of Bashkortostan), Collected papers Fiziko-khimicheskaya gidrodinamika (Physico-chemical hydrodynamics), Proceedings of The first summer school-conference, 2016, pp. 174-183.

6. Chernyshov S.E., Features of directional wells construction considering the size of buffer zones on the Verkhnekamskoye potassium salt deposit (In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2006, no. 1, pp. 137-143.

7. Nikolaev N.I., Kozhevnikov E.V., Enhancing the cementing quality of the well with horizontal profile (In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2014, no. 11, pp. 29-37, DOI 10.15593/2224-9923/2014.11.3

8. Poplygina I.S., Opportunities of improved development of high-viscosity oil pool in Perm kray (In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2014, no. 11, pp. 57-66, DOI 10.15593/2224-9923/2014.11.6

9. Talipov R.N., Mukhametshin A.A., Technology of drilling two additional bores from horizontal part of directional well (In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2012, no. 2, pp. 45-54.

10. Krysin N.I., Dombrovskiy I.V., Krivoshchekov S.N. et al., Study of fiber optic gyroscopes for telemetry systems of well trajectory monitoring (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 12, pp. 102-105.

11. Krivoshchekov S.N., Melekhin A.A., Turbakov M.S. et al., Development of a telemetric system for monitoring downhole parameters in the course of wells construction (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2017, no. 9, pp. 86-88.

12. Kychkin A.V., Volodin V.D., Sharonov A.A. et al., The synthesis of the hardware and software system structure for remote monitoring and control of the wellbore trajectory while drilling by rotary steerable system (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 11, pp. 128-132.

13. Tereshin V.G., Ivanova G.A., The choice of dynamically tuned and fiber-optic gyroscopes for directional survey (In Russ.), Vestnik UGATU, 2012, no. 1(46), pp. 62-69.

14. Korkishko Yu.N., Fedorov V.A., Prilutskiy V.E. et al., Fiber-optic gyroscopes, blocks of sensitive elements and free-of-charge inertial navigation systems based on them (In Russ.), Foton-ekspress, 2013, no. 6 (110), pp. 44-45.


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