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1990 Fiscal Year Final Research Report Summary

Studies on Thermal Properties of Drilling Mud at High Temperatures and Pressures

Research Project

Project/Area Number 01550489
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 資源開発工学
Research InstitutionTohoku University

Principal Investigator

KIYOHASHI Hiroshi.  Tohoku Univ., Fac. of Eng., Assoc. Prof., 工学部, 助教授 (70005263)

Co-Investigator(Kenkyū-buntansha) KYO Munesuke.  Tohoku Univ., Fac. of Eng., Instructor, 工学部, 助手 (20005458)
ENOMOTO Heiji.  Tohoku Univ., Fac. of Eng., Prof., 工学部, 教授 (80005412)
Project Period (FY) 1989 – 1990
Keywordsdrilling mud / thermal conductivity / high temperature / twin hot wire method / probe method / bentonite mud / accuracy / U-character-shape wire method
Research Abstract

1. OBJECTIVE : Thermal properties, especially, thermal conductivity and apparent viscosity of drilling mud under high temperatures and pressures are needed to analyze the temperature change of the mud circulating in the mud drilling line in high temperature reservoirs and to estimate early virgin strata temperatures around the well drilled. Mud used in exploration and production wells are almost universally water-based mud consisting dispersions of colloidal clay in fresh water and some peptizers. As the results of the constituents, the mud are electrolyte. Objective of this research is to develop a measurement system of the thermal conductivity of the bentonite mud and to evaluate the change of the value with the concentration and temperature, so on. of the mud.
2. RESULTS in Fiscal 1989 : Twin needle probe type apparatus to cancel the end effects in the measurement was developed using Inconel 600 sheath K-thermocouple wires with 0.65mm O. D. and 0.07mm wall thickness. Test results sho … More wed that thermal conductivity, lambda, of pure bentonite mud increased with increasing the mud concentration and temperature in lower temperatures than 100^゚C of the mud autoclaved ones [0.7 at 20^゚C to 0.85W/(m・K) at 250^゚C], however, lambda of it decreased with mud temperature in the case of the mud autoclaved one equal to 200^゚C. Accuracy of the measurements are estimated as <plus-minus>7.0%.
3. RESULTS in Fiscal 1990 : Twin thin platinum wires of U-character-shape type apparatus was developed to measure lambda more accurately. Diameter of the platinum wire is 40 mu m and it is coated with 6 mu m thickness polyamide-imide layer. Measurement errors were estimated as <plus-minus>3.2% for pure water of temperatures from 25 to 50^゚C and <plus-minus>3.8% for glycerol of temperatures from 25 to 150^゚C. Reproducibility of the experimental values of lambda at 20^゚C of the mud having 10% concentration was <plus-minus>1.7% and the mean value was 0.537W/(m・K). It is the subject for a future study to simplify the measurement operation with maintaining the high accurately. Less

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 幾世橋 広・松木 彰・京 宗輔・千葉 昌宏・高杉 真司・村松 茂樹・篠原 信雄: "高温・高圧下におけるベントンナイト基本泥水の熱伝導率の測定" 石油技術協会誌. (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 幾世橋 広・松木 彰・京 宗輔・千葉 昌宏・高杉 真司・村松 茂樹・篠原 信雄: "高温・高圧下におけるベントンナイト基本泥水のレオロジー特性及び熱伝導率との関係" 石油技術協会誌. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 幾世橋 宏・兵藤 正美・高杉 真司・村松 茂樹・京 宗輔: "高温下におけるベントナイト掘削泥水の見掛け粘度に及ぼす固形分の影響" 日本地熱学会誌. (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 幾世橋 宏・菅野 充広・京 宗輔: "U字状細線相殺法による掘削泥水の熱伝導率の高精度測定" 石油技術協会誌. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] KIYOHASHI, Hiroshi: "Measurement of Thermal Conductivity of Bentonite Mud at High Temperature and Pressure" Journal of the Japanese Associ. for Petroleum Technology. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] KIYOHASHI, Hiroshi: "Relations between Rheological Properties and Thermal Conductivity of Bentonite Base Mud at High temperatures and Pressures" Journal of the Japanese Associ. for Petroleum Technology. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] KIYOHASHI, Hiroshi: "Effects of Solid Concentration on Apparent Viscosity of Bentooite Drilling Mud at High Temperature" Journal of the Geothermal Research Society of Japan. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] KIYOHASHI, Hiroshi: "High Accurate Measurement of Thermal Conductivity of Drilling Mud by Twin U-character-shape Wire Method" Journal of the Japanese Associ. for Petroleum Technology. (1992)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-08-12  

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