Abstract
K oil field of Central Asia has several characteristics: sand grain is relatively fine, reservoirs heterogeneous character is obvious, oil viscosity is high, and water flooding is serious. Based on long-term work on well log interpretation for K oil field, an effective method for evaluating water-flooded layers has been found out, and a new reservoir classification chart has been generated, which is applied especially in heterogeneous reservoirs. The key of log interpretation of water-flooded layers is mastering the reduction degree of oil saturation of reservoirs rather than the oil saturation itself, especially to the old oil field with incomplete data. K oil field has three grades of reservoir: Type I is mainly fine sandstone that deposits in distributary channel; Type III is mainly argillaceous sandstone that deposits in mouth bar; Type II is mainly silt that deposits in both distributary channel and mouth bar. Besides, the relationship between resistivity and oil column height of hundreds of wells’ original oil layers has been analyzed, and these oil layers in cross plot of resistivity and oil column can be divided into three groups according to reservoir classification and a sole capillary pressure curve. The resistivity of each group of oil layers has been made multivariate regression. As a result, the resistivity of water-flooded layers could be inversed, and water cut could be estimated. According to the study of well log on flooded zoon, the application in 34 new wells showed that the coincidence rate is 85.3%, and this method can be used to other old oil fields in Central Asia.
Copyright 2018, Shaanxi Petroleum Society.
This paper was prepared for presentation at the 2018 International Field Exploration and Development Conference in Xi’an, China, September 18–20, 2018.
This paper was selected for presentation by the IFEDC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC Committee and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Committee, its members. Papers presented at the Conference are subject to publication review by Professional Committee of Petroleum Engineering of Shaanxi Petroleum Society. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of Shaanxi Petroleum Society are prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC. Contact email: paper@ifedc.org.
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References
Tian ZY, Mu LX, Sun DM, Lv LH. The characterize and mechanical study of water flooded layers in sandstone and conglomerate reservoirs. Acta Petrol Sin. 2002;23(6):50–5.
Yang JQ, Lu Y, Ma HY, et al. On variation regularity of resistivity of mixed formation water in water-flooded zone. Well Logging Technol. 2006;30(3):195–7 (in Chinese).
Chen C, Song XM, Li J. Dominant flow channels of point-bar reservoirs and their control on the distribution of remaining oils. Acta Petrol Sin. 2012;33(2):257–63 (in Chinese).
Li Z, Zhang YSH, QYu Y, et al. Fine modelling analysis method of water flooded layer porosity and permeability for Wenxisan block. Well Logging Technol. 2015;39(6):733–9.
Yang Li, Liqiang SiMa, Xuequn Tan, Junfa Zhang. Evaluation method of water-flooded layers based on geologic factors and well logs: case study from M reservoir, porous carbonate, Central Asia. Prog Geophys. 2016;31(1):251–9.
Acknowledgements
The authors would like to thank the “Special and Significant Project of National Science and Technology: Global oil and gas resources assessment and constituencies with research” to support this study, and the fund number is 2016ZX05029.
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Lin, Y., Guo, Z., Sheng, S., Zheng, J., Luo, M., Liang, H. (2020). A New Method for Flooded Layer Evaluation by Logging with Strong Heterogeneous in Heavy Oil Reservoirs, K Field, Central Asia. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2018. IFEDC 2018. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-7127-1_31
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DOI: https://doi.org/10.1007/978-981-13-7127-1_31
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