Abstract
The prediction of a safe mud weight is important when drilling highly inclined or horizontal wells through permeable, poorly consolidated formations. If the mud weight used to drill these types of wells is too high, differential sticking of the drill string will occur. If the mud weight is too low, it is possible that the well bore will collapse. The standard linear elasticity borehole stability analysis methods used by many in industry predicts an unnecessarily high mud weight to prevent borehole collapse,while the safe mud weight is significantly lower. This paper describes a new core-based well stability analysis for horizontal or highly inclined wells in weak formations. New procedures to measure core strength and deformation and the numerical procedure to calculate the well stability for a highly non-linear formation are discussed. Field data and experiences are also included to validate the non-linear borehole stability analysis.
| Original language | English |
|---|---|
| Title of host publication | Proceedings - SPE Annual Technical Conference and Exhibition |
| Editors | Anon |
| Place of Publication | Richardson, TX, United States |
| Publisher | Publ by Society of Petroleum Engineers (SPE) |
| Pages | 187-200 |
| Number of pages | 14 |
| Volume | Delta |
| Publication status | Published - 1993 |
| Event | Proceedings of the SPE Annual Technical Conference and Exhibition. Part 2(of 5) - Houston, TX, USA Duration: 1993 Oct 3 → 1993 Oct 6 |
Other
| Other | Proceedings of the SPE Annual Technical Conference and Exhibition. Part 2(of 5) |
|---|---|
| City | Houston, TX, USA |
| Period | 93/10/3 → 93/10/6 |
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ASJC Scopus subject areas
- Geology
- Geotechnical Engineering and Engineering Geology
Cite this
Core-based horizontal or highly inclined well stability analysis for unconsolidated formations. / Morita, Nobuo; Ross, C. K.
Proceedings - SPE Annual Technical Conference and Exhibition. ed. / Anon. Vol. Delta Richardson, TX, United States : Publ by Society of Petroleum Engineers (SPE), 1993. p. 187-200.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Core-based horizontal or highly inclined well stability analysis for unconsolidated formations
AU - Morita, Nobuo
AU - Ross, C. K.
PY - 1993
Y1 - 1993
N2 - The prediction of a safe mud weight is important when drilling highly inclined or horizontal wells through permeable, poorly consolidated formations. If the mud weight used to drill these types of wells is too high, differential sticking of the drill string will occur. If the mud weight is too low, it is possible that the well bore will collapse. The standard linear elasticity borehole stability analysis methods used by many in industry predicts an unnecessarily high mud weight to prevent borehole collapse,while the safe mud weight is significantly lower. This paper describes a new core-based well stability analysis for horizontal or highly inclined wells in weak formations. New procedures to measure core strength and deformation and the numerical procedure to calculate the well stability for a highly non-linear formation are discussed. Field data and experiences are also included to validate the non-linear borehole stability analysis.
AB - The prediction of a safe mud weight is important when drilling highly inclined or horizontal wells through permeable, poorly consolidated formations. If the mud weight used to drill these types of wells is too high, differential sticking of the drill string will occur. If the mud weight is too low, it is possible that the well bore will collapse. The standard linear elasticity borehole stability analysis methods used by many in industry predicts an unnecessarily high mud weight to prevent borehole collapse,while the safe mud weight is significantly lower. This paper describes a new core-based well stability analysis for horizontal or highly inclined wells in weak formations. New procedures to measure core strength and deformation and the numerical procedure to calculate the well stability for a highly non-linear formation are discussed. Field data and experiences are also included to validate the non-linear borehole stability analysis.
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UR - http://www.scopus.com/inward/citedby.url?scp=0027831292&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0027831292
VL - Delta
SP - 187
EP - 200
BT - Proceedings - SPE Annual Technical Conference and Exhibition
A2 - Anon, null
PB - Publ by Society of Petroleum Engineers (SPE)
CY - Richardson, TX, United States
ER -