Volume 8, Issue 6, November 2020, Page: 124-129
Improved Water Injection Index Curve on Estimation of Oil in Place for Fractured Vuggy Carbonate Reservoirs
Fan Haijun, School of Petroleum Engineering, China University of Petroleum, Qingdao, China
Kang Zhijiang, Petroleum Exploration & Production Research Institute, SINOPEC, Beijing, China
Zheng Songqing, Petroleum Exploration & Production Research Institute, SINOPEC, Beijing, China
Zhu Guiliang, Petroleum Exploration & Production Research Institute, SINOPEC, Beijing, China
Received: Oct. 15, 2020;       Accepted: Oct. 26, 2020;       Published: Nov. 4, 2020
DOI: 10.11648/j.ogce.20200806.11      View  53      Downloads  28
Abstract
Fractured vuggy carbonate reservoirs play an important role in the world crude oil resources. The significant reservoir heterogeneity represented by complex distribution of multi-scale fractures and vugs brings challenges to reservoir oil in place (OIP) estimation, which is a fundamental parameter in oil field development. OIP estimation based on production dynamic analysis is regularly carried out in oilfield practice, the result of which is normally adopted as a comparison to volumetric calculation from geological study for mutual verification. This paper introduces a widely used water injection index curve method on OIP estimation of fractured vuggy carbonate reservoir in Tarim oilfield, which is a straight forward plot of bottom-hole pressure versus cumulative water injection. An improved model taking into consideration the compressibility of second gas gap is presented and applied on real well from Tahe carbonate reservoir. The application of the new model demonstrated that conventional method tends to over-estimate the OIP, while the improved model gives a relatively reliable estimation. The improved water injection index curve in this paper is easy to be conducted based on well production and injection dynamic and shows advantages on convenient pressure conversion from well-head to well-bottom and avoiding dealing with the high uncertainty of aquifers in carbonate reservoir.
Keywords
Fractured Vuggy Carbonate Reservoir, Oil in Place, Water Injection Index Curve, Oil Compressibility
To cite this article
Fan Haijun, Kang Zhijiang, Zheng Songqing, Zhu Guiliang, Improved Water Injection Index Curve on Estimation of Oil in Place for Fractured Vuggy Carbonate Reservoirs, International Journal of Oil, Gas and Coal Engineering. Vol. 8, No. 6, 2020, pp. 124-129. doi: 10.11648/j.ogce.20200806.11
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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