Estimation of Pore Pressure and Fracture Gradient in Volve Field, Norwegian North Sea
- Souvik Sen (Geologix Limited) | Shib Sankar Ganguli (CSIR-National Geophysical Research Institute)
- Document ID
- Society of Petroleum Engineers
- SPE Oil and Gas India Conference and Exhibition, 9-11 April, Mumbai, India
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Petroleum Engineers
- 1.6 Drilling Operations, 1.7.6 Wellbore Pressure Management, 1.10 Drilling Equipment, 1.10 Drilling Equipment
- Volve field, Pore pressure estimation, Fracture pressure gradient, CO2 sequestration
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- 163 since 2007
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Maintaining a stable borehole and optimizing drilling are still considered to be vital practice for the success of any hydrocarbon field development and planning. The present study deliberates a case study on the estimation of pore pressure and fracture gradient for the recently decommissioned Volve oil field at the North Sea. High resolution geophysical logs drilled through the reservoir formation of the studied field have been used to estimate the overburden, pore pressure, and fracture pressure. The well-known Eaton’s method and Matthews-Kelly’s tools were used for the estimation of pore pressure and fracture gradient, respectively. Estimated outputs were calibrated and validated with the available direct downhole measurements (formation pressure measurements, LOT/FIT). Further, shear failure gradient has been calculated using Mohr-Coulomb rock failure criterion to understand the wellbore stability issues in the studied field. Largely, the pore pressure in the reservoir formation is hydrostatic in nature, except the lower Cretaceous to upper Jurassic shales, which were found to be associated with mild overpressure regimes. This study is an attempt to assess the in-situ stress system of the Volve field if CO2 is injected for geological storage in near future.
|File Size||1 MB||Number of Pages||8|
Eaton, B. A., 1975. The equation for geopressure prediction from well logs. Society of Petroleum Engineers of AIME. SPE-5544-MS.https://doi.org/10.2118/5544-MS.
Ganguli, S. S., Vedanti, N., Akervoll, I. and Dimri, V. P., 2016. Assessing the Feasibility of CO2-Enhanced Oil Recovery and Storage in Mature Oil Field: A Case Study from Cambay Basin. Jour of Geol Soc of India 88 (03): 273-280.https://doi.org/10.1007/s12594-016-0490-x.
Kundan, A., Vinod, A. K., Bose, P. N. S., Sen, S. and Kumar, M., 2015. Analysis of Wellbore Breakouts and Determination of Horizontal Stress Direction from Four Arm Calipers – A Study from Gulf of Kutch, Western Offshore Basin. Presented at the 11th Biennial International Conference & Exposition, SPG, Jaipur, India. paper ID 37.
Plumb, R. A., Evans, K. F. and Engelder, T., 1991. Geophysical log responses and their correlation with bed to bed stress contrasts in Paleozoic rocks, Appalachian plateau, New York. Jour Geophy Res 91:14509–14528. https://doi.org/10.1029/91JB00896.
Sen, S., Kundan, A., Kumar, M., 2018. Post-drill analysis of Pore Pressure and Fracture Gradient from Well Logs and Drilling Events – An Integrated Case Study of a High Pressure Exploratory Well from Panna east, Mumbai Offshore Basin, India. Presented at the AAPG Geosciences Technology Workshop, Perth, Australia, 6-7 June.