A Stability Analysis of Directional Drilling on the Shales with Weak Bedding Planes

doi:10.12972/ksmer.2013.50.3.329

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2013 Vol.50, Issue 3 Next Page

Research Paper

A Stability Analysis of Directional Drilling on the Shales with Weak Bedding Planes 약한 층리면이 발달된 셰일층의 방향성 시추공의 안정성 분석: 윤재필 · 김현태 · 박희원
Jae Pil Yoon, Hyun Tae Kim and Hee Won Park

30 June 2013. pp. 329-338

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Abstract

In this paper, directional wellbore stability analysis is carried out for the shales in which weak bedding planes are developed. Shale layers in Northeastern British Columbia area has been selected for the wellbore stability analysis due to well-known geological and geomechanical properties. In the case of shale layer with weak bedding planes, it was found that breakouts around the wellbore developed asymmetrically. It was also found that wellbore is more stable with the trajectory almost perpendicular to the weak bedding planes. In this case, less mud weight can be applied to achieve more stable directional wellbore with this trajectory. It is expected that the methodologies and results in this paper can be beneficial to wellbore stability analyses for shale layers with similar geological and geomechanical setting to this research area.

Keywords

Weak bedding planes

Shales

directional wellbore stability

drilling trajectory

Mud weight

본 연구에서는 약한 층리면이 발달된 셰일층에서 방향성 시추시 발생할 수 있는 안정성 문제를 분석하였다. 분석을 위해 대체로 지질학적 특성과 암석역학적 자료가 잘 알려진 캐나다 북동 브리티시 콜롬비아 지역의 셰일층을 선택하였다. 연구 결과 약한 층리면이 발달되어 있는 셰일층의 경우에는 붕괴 시 비대칭적 붕괴가 일어나는 것을 알 수 있었다. 또한, 약한 층리면이 발달한 경우에는 시추공이 층리면에 대해 수직에 가까울수록 더욱 안정적인 것을 알 수 있었다. 이러한 경우 최적의 방향성 시추궤도의 선정은 시추이수의 비중을 높이지 않고서도 안정적 시추를 가능케 함을 알 수 있었다. 이 연구 방법 및 결과는 향후 지질학적으로 이 연구지역과 유사한 퇴적특성을 지닌 셰일층에서의 방향성 시추 안정성 평가에 활용할 수 있을 것이다.

키워드

약한 층리면

셰일층

방향성 시추 안정성

시추궤도

시추이수비중

References

Aadnoy, B.S., 1988, “Modeling of the Stability of Highly Inclined Boreholes in Anisotropic Rock Formations,” SPE Drilling Engineering, Vol. 3 No. 3, pp. 259-268.
Al-Wardy, W. and Urdaneta, O.P., 2010, “Geomechanical Modeling for Wellbore Stability during Drilling Nahr Umr Shales in a field in Petroleum Development Oman,” paper SPE 138214 presented at the Abu Dhabi International Petroleum Exhibition & Conference, Abu Dhabi, UAE, 1-4 November.
Amadei, B., 1996, “Importance of Anisotropy When Estimating and Measuring In Situ Stresses in Rock,” International J. of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Vol. 33 No. 3, pp. 293-325.
Bell, J.S., Price, P.R. and McLellan, P.J., 1994, “In-Situ Stress in the Wester Canada Sedimentary Basin,” Chapter 29 in the Geological Atals of the Western Canada Sedimentary Basin, Canadian Society of Sedimentary Geologists and the Alberta Research Council.
Blanton, T.L. and Olson, J.E., 1999, “Stress Magnitudes from Logs: Effects of Tectonic Strains and Temperature,” SPE Reservoir Evaluation & Engineering, Vol. 2 No. 1, pp. 62-68.
Fjaer, E., Holt, R.M., Horsrud, P., Raaen, A.M. and Risnes, R., 2008, Petroleum Related Rock Mechanics, 2^nd Ed., Vol. 53, Elsevier, Amsterdam, Netherlands, pp. 103-123.
Gallant, C., Zhang, J., Wolfe, C.A., Freeman, J., Al-Bazli, T. and Reese, M., 2007, “Wellbore Stability Considerations for Drilling High-Angle Wells through Finely Laminated Shale: A Case Study from Terra Nova,” paper SPE 110742 presented at the SPE Annual Technical Conference and Exhibition, Anaheim, California, U.S.A, 11-14 November.
GMI-SFIB User Manual, 2010, GeoMechanics International, Inc. Houston, Texas, U.S.A., February.
Kim, H. and Min, K., 2012, “Wellbore Stability Analysis in Traverse Isotropic Rock,” Proc. of the 98^th Korean Society for Geosystem Engineering Conference, JeJu Internation Convention Center, Jeju, Korea May 3-4.
Lee, H., Ong, S.H., Azeemuddin, M. and Goodman, H., 2012, “A Wellbore Stability Model for Formations with Anisotropic Rock Strengths,” J. of Petroleum Science and Engineering, Vol. 96-97, pp. 109-119.
McLellan, P.J. and Cormier, K., 1996, “Borehole Instability in Fissil, Dipping Shales, Northeastern British Columbia,” paper SPE 35634 presented at the Gas Technology Conference, Alberta, Canada, 28 April –1 May.
Mingxin, Z., Xinguo, T., Bailin, W., Tan, C., Shiduo, Y. and Shunchang, W., 2009, “Comprehensive Geomechanics Study Helps Mitigate Sever Stuck Pipe Problems in Development Drilling in Bohai Bay, China,” paper IPTC 14091 presented at the International Petroleum Technology Conference, Doha, Quatar, 7-9 December.
Son, H.R., Lee, W.S. and Kim, H.T., 2007, “Rock Properties Evaluation of Tight Gas Reservoir using Geophysical Well Logs in Chimney Butte Field, Wyoming,” J. of Korean Society for Geosystem Engineering, Vol. 44, No. 5, pp. 418-427.
Tare, U.A. and Mody, F.K., 1999, “Novel Approach to Borehole Stability Modeling for ERD and Deepwater Drilling,” paper SPE 52188 presented at the SPE Mid-Continent Operations Symposium, Oklahoma City, Oklahoma, U.S.A., 28-31 March.
Teichrob, R., Kustamsi, A., Hareland, G. and Odiegwu, U., 2010, “Estimating In Situ Stress Magnitudes and Orientations in an Albertan Field in Western Canada,” paper ARMA 10-224 presented at the 44^th US Rock MechanicsSymposium and 5^th U.S.-Canada Rock Mechanics Symposium, Salt Lake City, Utah, U.S.A., 27-30 June.
Willson, S.M., Last, N.C., Zoback, M.D. and Moos, D., 1999, “Drilling in South America: A Wellbore Stability Approach for Complex Geologic Conditions,” paper SPE 53940 presented at the SPE Latin American and Caribbean Petroleum Engineering Conference, Caracas, Venezuela, 21-23 April.
Yi, X., Goodman, H.E., Williams, R.S. and Hilarides, W.K., 2008, “Building a Geomechanical Model for Kotabatak Field with Applications to Sanding Onset and Wellbore Stability Predictions,” paper IADC/SPE 114697 presented at the IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition, Jakarta, Indonesia, 25-27 August.
Zhang, J., Yu, M., Al-Bazali, T.M., Ong, S.H., Chenvert, M.E., Sharma, M.M. and Clark, D.E., 2006, “Maintaining the Stability of Deviated and Horizontal Wells: Effects of Mechanical, Chemical and Thermal Phenomena on Well Designs,” paper SPE 100202 presented at the SPE International Oil & Gas Conference and Exhibition, Beijing, China, 5-7 December.
Zoback, M.D., Barton, C.A., Brudy, M., Castillo, D.A., Finkbeiner, T., Grollimund, B.R., Moos, D.B., Peska, P., Ward, C.D. and Wiprut, D.J., 2003, “Determination of Stress Orientation and Magnitude in Deep Wells,” International Journal of Rock Mechanics and Mining Sciences, Vol. 40, No. 7-8, pp. 1049-1076.
Zoback, M.D., 2008, Reservoir Geomechanics, 1^st Ed., Cambridge Unversity Press, New York, U.S.A., pp. 167-196, 235-255.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 50
No :3
Pages :329-338
DOI :https://doi.org/10.12972/ksmer.2013.50.3.329

[1] Aadnoy, B.S., 1988, “Modeling of the Stability of Highly Inclined Boreholes in Anisotropic Rock Formations,” SPE Drilling Engineering, Vol. 3 No. 3, pp. 259-268.

[2] Al-Wardy, W. and Urdaneta, O.P., 2010, “Geomechanical Modeling for Wellbore Stability during Drilling Nahr Umr Shales in a field in Petroleum Development Oman,” paper SPE 138214 presented at the Abu Dhabi International Petroleum Exhibition & Conference, Abu Dhabi, UAE, 1-4 November.

[3] Amadei, B., 1996, “Importance of Anisotropy When Estimating and Measuring In Situ Stresses in Rock,” International J. of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Vol. 33 No. 3, pp. 293-325.

[4] Bell, J.S., Price, P.R. and McLellan, P.J., 1994, “In-Situ Stress in the Wester Canada Sedimentary Basin,” Chapter 29 in the Geological Atals of the Western Canada Sedimentary Basin, Canadian Society of Sedimentary Geologists and the Alberta Research Council.

[5] Blanton, T.L. and Olson, J.E., 1999, “Stress Magnitudes from Logs: Effects of Tectonic Strains and Temperature,” SPE Reservoir Evaluation & Engineering, Vol. 2 No. 1, pp. 62-68.

[6] Fjaer, E., Holt, R.M., Horsrud, P., Raaen, A.M. and Risnes, R., 2008, Petroleum Related Rock Mechanics, 2^nd Ed., Vol. 53, Elsevier, Amsterdam, Netherlands, pp. 103-123.

[7] Gallant, C., Zhang, J., Wolfe, C.A., Freeman, J., Al-Bazli, T. and Reese, M., 2007, “Wellbore Stability Considerations for Drilling High-Angle Wells through Finely Laminated Shale: A Case Study from Terra Nova,” paper SPE 110742 presented at the SPE Annual Technical Conference and Exhibition, Anaheim, California, U.S.A, 11-14 November.

[8] GMI-SFIB User Manual, 2010, GeoMechanics International, Inc. Houston, Texas, U.S.A., February.

[9] Kim, H. and Min, K., 2012, “Wellbore Stability Analysis in Traverse Isotropic Rock,” Proc. of the 98^th Korean Society for Geosystem Engineering Conference, JeJu Internation Convention Center, Jeju, Korea May 3-4.

[10] Lee, H., Ong, S.H., Azeemuddin, M. and Goodman, H., 2012, “A Wellbore Stability Model for Formations with Anisotropic Rock Strengths,” J. of Petroleum Science and Engineering, Vol. 96-97, pp. 109-119.

[11] McLellan, P.J. and Cormier, K., 1996, “Borehole Instability in Fissil, Dipping Shales, Northeastern British Columbia,” paper SPE 35634 presented at the Gas Technology Conference, Alberta, Canada, 28 April –1 May.

[12] Mingxin, Z., Xinguo, T., Bailin, W., Tan, C., Shiduo, Y. and Shunchang, W., 2009, “Comprehensive Geomechanics Study Helps Mitigate Sever Stuck Pipe Problems in Development Drilling in Bohai Bay, China,” paper IPTC 14091 presented at the International Petroleum Technology Conference, Doha, Quatar, 7-9 December.

[13] Son, H.R., Lee, W.S. and Kim, H.T., 2007, “Rock Properties Evaluation of Tight Gas Reservoir using Geophysical Well Logs in Chimney Butte Field, Wyoming,” J. of Korean Society for Geosystem Engineering, Vol. 44, No. 5, pp. 418-427.

[14] Tare, U.A. and Mody, F.K., 1999, “Novel Approach to Borehole Stability Modeling for ERD and Deepwater Drilling,” paper SPE 52188 presented at the SPE Mid-Continent Operations Symposium, Oklahoma City, Oklahoma, U.S.A., 28-31 March.

[15] Teichrob, R., Kustamsi, A., Hareland, G. and Odiegwu, U., 2010, “Estimating In Situ Stress Magnitudes and Orientations in an Albertan Field in Western Canada,” paper ARMA 10-224 presented at the 44^th US Rock MechanicsSymposium and 5^th U.S.-Canada Rock Mechanics Symposium, Salt Lake City, Utah, U.S.A., 27-30 June.

[16] Willson, S.M., Last, N.C., Zoback, M.D. and Moos, D., 1999, “Drilling in South America: A Wellbore Stability Approach for Complex Geologic Conditions,” paper SPE 53940 presented at the SPE Latin American and Caribbean Petroleum Engineering Conference, Caracas, Venezuela, 21-23 April.

[17] Yi, X., Goodman, H.E., Williams, R.S. and Hilarides, W.K., 2008, “Building a Geomechanical Model for Kotabatak Field with Applications to Sanding Onset and Wellbore Stability Predictions,” paper IADC/SPE 114697 presented at the IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition, Jakarta, Indonesia, 25-27 August.

[18] Zhang, J., Yu, M., Al-Bazali, T.M., Ong, S.H., Chenvert, M.E., Sharma, M.M. and Clark, D.E., 2006, “Maintaining the Stability of Deviated and Horizontal Wells: Effects of Mechanical, Chemical and Thermal Phenomena on Well Designs,” paper SPE 100202 presented at the SPE International Oil & Gas Conference and Exhibition, Beijing, China, 5-7 December.

[19] Zoback, M.D., Barton, C.A., Brudy, M., Castillo, D.A., Finkbeiner, T., Grollimund, B.R., Moos, D.B., Peska, P., Ward, C.D. and Wiprut, D.J., 2003, “Determination of Stress Orientation and Magnitude in Deep Wells,” International Journal of Rock Mechanics and Mining Sciences, Vol. 40, No. 7-8, pp. 1049-1076.

[20] Zoback, M.D., 2008, Reservoir Geomechanics, 1^st Ed., Cambridge Unversity Press, New York, U.S.A., pp. 167-196, 235-255.

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