Abstract
Following coring and retrieval of the core sample, knowing its exact orientation with respect to the formation bedding contributes to better understanding the geological structure of the reservoir. Knowing the structure, in turn, helps to identify the most efficient recovery methods. However, this knowledge is not conventionally available unless oriented coring is utilized. Therefore, application of this method is mainly recommended in complex reservoir structures in the drilling and production phases (inferred from Brindley 1988; Laubach and Doherty 1999; Dennis et al. 1987).
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Notes
- 1.
Also called Main Reference Line (MRL) or Master Orientation Line (MOL).
- 2.
Especially, in formations consisting of fluvial deposits.
- 3.
Currently, many coring companies cannot run the oriented coring for the wireline method as it is not feasible with their current kits. However, it would be potentially possible with some engineering input or modification of the wireline continuous system to accommodate the oriented mode system. Such a system is expected to face the limitation of use in high inclination angles (e.g., for angles > 25°).
- 4.
In some sources, it stands for ‘Electronic Multi-Shot Survey’.
References
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Brindley, C.P. and Sperry-Sun, N.L. 1988. Continuous Orientation Measurement Systems Minimize Drilling Risk During Coring Operations, SPE-17217-MS, Presented at SPE/IADC Drilling Conference, 28 February-2 March, Dallas, Texas.
Dennis, B., E. Standen, D.T. Georgi, and G.O. Callow. 1987. Fracture Identification and Productivity Predictions in a Carbonate Reef Complex, SPE 16808-MS. Presented at the 62nd SPE Annual Technical Conference and Exhibition, Dallas, Texas.
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Ashena, R., Thonhauser, G. (2018). Oriented Coring. In: Coring Methods and Systems. Springer, Cham. https://doi.org/10.1007/978-3-319-77733-7_10
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DOI: https://doi.org/10.1007/978-3-319-77733-7_10
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