Assessing skin factor through open hole logging
UDC: 550.8.056
DOI: -
Authors:
ORLOV N.M.
1,
KOZHEVNIKOV S.V.1,
KOVALENKO K.V.1
1 National University of Oil and Gas "Gubkin University", Moscow, Russia
Keywords: productive formation permeability damage, skin factor of a productive formation, near-wellbore zone, invasion zone, geophysical well logging, logging while drilling, petrophysical modelling, resistivity log analysis
Annotation:
The authors of the article propose an approach to open hole well logging data interpretation aimed at definite characterizing the degree of changing bottomhole zone permeability differentiated by depth and predicting the skin factor formation. Skin factor is looked upon as a function of four parameters including the radius of impacted zone and its equivalent permeability, which could be derived from complexing well logging data and core analysis. The approach utilizes radial modelling of petrophysical properties (resistivity, saturation, permeability) using differences in the depth of investigation of various logging methods to determine the size and effective permeability of zone that experienced technogenic impact during initial formation penetration. The conditions of the method application and recommendations for its petrophysical support are outlined. The proposed interpretation algorithm can be used for prompt assessment of the formation skin factor during primary drilling-in based on real-time logging-while-drilling or cable logging data. The characteristic of the permeability change in the bottomhole formation zone obtained at the early stages of the well’s life can find various areas of application, including correction of drilling parameters; design of formation tests, geological and technical measures and secondary drilling-in.
Bibliography:
1. Kremenetskiy M.I., Ipatov A.I. Primenenie promyslovo-geofizicheskogo kontrolya dlya optimizatsii razrabotki i monitoringa dobychi. – M.–Izhevsk: Institut komp’yuternykh issledovaniy, 2020. – 660 s.
2. Hawkins M.F. Jr. A Note on the Skin Effect // Journal of Petroleum Technology. – 1956. – Vol. 8. – Is. 12. – Pp. 65–66. – SPE-732-G. – DOI: 10.2118/732-G
3. Ahmed T., McKinney P.D. Advanced Reservoir Engineering // Gulf Publishing Company, 2005. – Pp. 37–38.
4. Yanturin A.Sh., Yanturin R.A. Ob ispol’zovanii skin-faktora dlya interpretatsii rezul’tatov geofizicheskikh issledovaniy skvazhin // Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdeniy. – 2014. – № 4. – S. 39–46.
5. Civan F. Reservoir Formation Damage: Fundamentals, Modeling, Assessment and Mitigation. – Gulf Publishing Company, 2000. – 760 p.
6. Mikhaylov N.N. Informatsionno-tekhnologicheskaya geodinamika okoloskvazhinnykh zon. – M.: Nedra, 1996. – 339 s.
7. Di Jiao, Sharma M.M. Formation Damage Due to Static and Dynamic Filtration of Water-Based Muds // Society of Petroleum Engineers, 1992. – SPE 23823. – DOI: 10.2118/23823-MS
8. Crain E.R. Crain’s Petrophysical Handbook. – 2023. – URL: www.spec2000.net (data obrashcheniya 27.12.2023).
9. Corey A.T. The interrelation between gas and oil relative permeabilities // Producers Monthly. – 1954. – Is. 19 (November). – Pp. 38–41.
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