Abstract
Suizhong 36-1 oil field is located in Liaodong Bay of Bohai Sea. In the paper, residual oil content and distribution of target area is displayed and the ultimate goal is to study gas-polymer alternating injection and work out an appropriate injection scheme for it. First, gas-polymer alternating injection mechanism is demonstrated. Second, A and B platform’s fault upper area of phase I is selected as the target block to adopt gas-polymer alternating injection experiment. Third, the geological modeling for SZ36-1 oil field is established to describe sandstone distributing regularities in vertical and horizontal directions and further make it clear how residual oil distributes. Then, by the means of numerical simulation, history match is conducted. At last, through orthogonal design, the optimum injection program is determined successfully. With the help of orthogonal design, applying range analysis and variance analysis procedure, the optimum parameters of gas-polymer alternating injection are obtained from 16 forecast scenarios. They are as follows: the gas injection volume is 0.3 PV, the injection rate is 0.03 PV/a, the gas–liquid ratio is 1:2, and alternating injection cycle is 30 days. Furthermore, compared with polymer flooding, the oil recovery gas-polymer alternating injection increases by about 5%.
Copyright 2017, Shaanxi Petroleum Society.
This paper was prepared for presentation at the 2017 International Petroleum and Petrochemical Technology Conference in Beijing, China, 20–22 March, 2017.
This paper was selected for presentation by the IFEDC&IPPTC 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&IPPTC Committee and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC&IPPTC 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 is 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&IPPTC. Contact email: paper@ifedc.org or paper@ipptc.org.
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Zhang, X., Huang, S., Ding, G. (2019). Study and Optimization of Gas-Polymer Alternating Injection Technique for Offshore Oil Field After Polymer Flooding. In: Qu, Z., Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2017. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-10-7560-5_68
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DOI: https://doi.org/10.1007/978-981-10-7560-5_68
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