Technical Review of the Drilling UK-1 Exploratory Well in South Karpovksy Block, Kazakhstan

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2011 Vol.48, Issue 5 Preview Page Next Page

Technical Review of the Drilling UK-1 Exploratory Well in South Karpovksy Block, Kazakhstan 카자흐스탄 South Karpovsky광구 UK-1 탐사정 시추작업에 대한 기술적 고찰: 이도행, 조보규, 배재연, 이준석, 장광훈, 류상수
DoHaeng Lee, BoGyu Cho, JaeYeon Bae, JunSeog Yi, GwangHoon Jang, and SangSoo Ryou

31 October 2011. pp. 648-656

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Abstract

Drilling campaign for the exploratory well(UK-1) was performed for 260 days from July 29, 2010 on the North Pre-Caspian basin in South Karpovksy block, northwestern part of Kazakhstan. This well is not only the first exploratory well ever operated by KNOC in South Karpovsky block but the first well drilled through salt formation including abnormal high pressure zone. This project is meaningful in that prospective reservoir formation data and technical data was obtained as a result of reaching to target depth through long salt formation, which is useful for increasing drilling efficiency forward in this kind of drilling environment. This study aims to suggest considerations for improvements in drilling performance of future operations through technical review of salt drilling, well control and remedial job with coiled tubing.

Keywords

Abnormal high pressure zone

Salt formation drilling

Well control

Coiled tubing

한국석유공사의 공동 운영광구인 카자흐스탄 북서부 North Pre-Caspian분지에 위치한 South Karpovksy광구에서 2010년 7월부터 약 260일에 걸쳐 탐사시추가 수행되었다. UK-1 시추공은 한국석유공사가 주도하여 수행한 South Karpovsky광구에서의 첫 탐사시추인 동시에 이상 고압대를 동반하는 암염층을 관통한 첫 시추이기도 하다. 목표지점까지 시추를 완료함으로써 North Pre-Caspian분지의 지질정보뿐만 아니라 각종 시추관련 자료를 취득할 수 있었으며 이는 향후 동일지역 또는 유사지역에서의 시추작업 시, 효율성 증진을 위한 참고자료로 유용하게 쓰일 수 있을 것이다. 본 기술보고에서는 시추운영 전반에 대한 내용과 함께 암염층 시추과정에서 발생한 시추공벽의 유실, 지층의 유동 및 협착, 지층유체의 유입, 시추이수의 손실 현상과 코일드 튜빙을 이용한 치유 및 제어 과정을 기술 하였으며 이를 통해 향후 시추작업의 개선방안을 제시하였다.

키워드

이상 고압대

암염층 시추

유정제어

코일드 튜빙

References

임종세, 강판상, 김현태, 2010, “육상 석유 심부시추 기술 동향 및 적용사례,” 한국지구시스템공학회지, 제47권 5호, pp. 809-821.
Baker, J.W., Feland, K.W. and Tsao, Y-H., 1994, “Drilling Long Salt Section Along the U.S. Gulf Coast,” SPE Drilling and Completion, Vol. 9, No. 3, pp. 1-2.
Charter, C., Mohan, S. and Imler, M., 2010, “Overcoming a difficult Salt Drilling Environment in the Gulf of Mexico: A Case Study,” paper SPE 128192 presented at the IADC/SPE Drilling Conference and Exhibition held in New Orleans, Louisiana, U.S.A., February 2-4.
Cooper, G.A. and Hatherly, P., 2003, “Prediction of Rock Mechanical Properties from Wireline Data and Their Use in Drilling Simulation,” paper SPE 83059 presented at the SPE Western Regional/AAPG Pacific Section Joint Meeting held in Long Beach, California, U.S.A., May 19-24.
Dupriest, F.E. and Koederitz, W.L., 2005, “Maximizing Drill Rates with Real-Time Surveillance of Mechanical Specific Energy,” paper SPE 92194 presented at the IADC/SPE Drilling Conference and Exhibition held in Amsterdam, Netherlands, February 23-25.
Dusseault, M.B., Maury, V., Sanfilippo, F. and Santarelli, F., 2004, “Drilling Around Salt: Risks, Stresses, And Uncertainties,” ARMA/NARMS, Proc. of the 6th North America Rock Mechanics Symposium, NARMS, Houston, Texas, U.S.A., June 5-9, pp. 2-12.
Portman, L., 2004, “Cementing through Coiled Tubing: Common Errors and Procedures,” paper SPE 89599 presented at the SPE/ICoTA Coiled Tubing Conference and Exhibition held in Houston, Texas, U.S.A., March 23-24.
Rongzun, H., Zuhui, Z., Jingen, D., Yuanfang, C. and Fangrong Z., 1989, “A Study of Viscoelastic-plastic Behavior of Rock Salt And It's Application In Petroleum Engineering,” Proc. of the ISRM International Symposium, ISRM, Pau, France, August 30-September 2, pp. 827-834.
Sas-Jaworsky, A., 2000, “Practical Considerations for Enhancing Coiled Tubing Well Control Operations,” paper SPE 60739 presented at the SPE/ICoTA Coiled Tubing Round Table held in Houston, Texas, U.S.A., April 5-6.
Whitfill, D., Rachal, G. and Lawson, J., 2002, “Drilling Salt - Effect of Drilling Fluid on Penetration Rate and Hole Size,” paper SPE 74546 presented at the IADC/SPE Dlling Conference and Exhibition held in Dallas, Texas, U.S.A., February 26-28.
Wilson, S.M. and Fredrich, J.T., 2005, “Geomechanics Considerations for Through- and Near- Salt Well Design,” paper SPE 95621 presented at the SPE Annual Technical Conference and Exhibition held in Dallas, Texas, U.S.A., October 9-12.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society for Geosystem Engineering
Journal Title(Ko) :한국지구시스템공학회지
Volume : 48
No :5
Pages :648-656

[1] 임종세, 강판상, 김현태, 2010, “육상 석유 심부시추 기술 동향 및 적용사례,” 한국지구시스템공학회지, 제47권 5호, pp. 809-821.

[2] Baker, J.W., Feland, K.W. and Tsao, Y-H., 1994, “Drilling Long Salt Section Along the U.S. Gulf Coast,” SPE Drilling and Completion, Vol. 9, No. 3, pp. 1-2.

[3] Charter, C., Mohan, S. and Imler, M., 2010, “Overcoming a difficult Salt Drilling Environment in the Gulf of Mexico: A Case Study,” paper SPE 128192 presented at the IADC/SPE Drilling Conference and Exhibition held in New Orleans, Louisiana, U.S.A., February 2-4.

[4] Cooper, G.A. and Hatherly, P., 2003, “Prediction of Rock Mechanical Properties from Wireline Data and Their Use in Drilling Simulation,” paper SPE 83059 presented at the SPE Western Regional/AAPG Pacific Section Joint Meeting held in Long Beach, California, U.S.A., May 19-24.

[5] Dupriest, F.E. and Koederitz, W.L., 2005, “Maximizing Drill Rates with Real-Time Surveillance of Mechanical Specific Energy,” paper SPE 92194 presented at the IADC/SPE Drilling Conference and Exhibition held in Amsterdam, Netherlands, February 23-25.

[6] Dusseault, M.B., Maury, V., Sanfilippo, F. and Santarelli, F., 2004, “Drilling Around Salt: Risks, Stresses, And Uncertainties,” ARMA/NARMS, Proc. of the 6th North America Rock Mechanics Symposium, NARMS, Houston, Texas, U.S.A., June 5-9, pp. 2-12.

[7] Portman, L., 2004, “Cementing through Coiled Tubing: Common Errors and Procedures,” paper SPE 89599 presented at the SPE/ICoTA Coiled Tubing Conference and Exhibition held in Houston, Texas, U.S.A., March 23-24.

[8] Rongzun, H., Zuhui, Z., Jingen, D., Yuanfang, C. and Fangrong Z., 1989, “A Study of Viscoelastic-plastic Behavior of Rock Salt And It's Application In Petroleum Engineering,” Proc. of the ISRM International Symposium, ISRM, Pau, France, August 30-September 2, pp. 827-834.

[9] Sas-Jaworsky, A., 2000, “Practical Considerations for Enhancing Coiled Tubing Well Control Operations,” paper SPE 60739 presented at the SPE/ICoTA Coiled Tubing Round Table held in Houston, Texas, U.S.A., April 5-6.

[10] Whitfill, D., Rachal, G. and Lawson, J., 2002, “Drilling Salt - Effect of Drilling Fluid on Penetration Rate and Hole Size,” paper SPE 74546 presented at the IADC/SPE Dlling Conference and Exhibition held in Dallas, Texas, U.S.A., February 26-28.

[11] Wilson, S.M. and Fredrich, J.T., 2005, “Geomechanics Considerations for Through- and Near- Salt Well Design,” paper SPE 95621 presented at the SPE Annual Technical Conference and Exhibition held in Dallas, Texas, U.S.A., October 9-12.

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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