Production optimization in well-6 of Habiganj gas field, Bangladesh: a prospective application of Nodal analysis approac
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ORIGINAL PAPER--PRODUCTION ENGINEERING
Production optimization in well‑6 of Habiganj gas field, Bangladesh: a prospective application of Nodal analysis approach Md. Shaheen Shah1,2 · Md Hafijur Rahaman Khan3,4,5 · Ananna Rahman3,4,5 · Stephen Butt1 Received: 16 February 2020 / Accepted: 6 May 2020 © The Author(s) 2020
Abstract The overall performance of gas reservoirs and the optimization of production, as well as its sensitivity analysis, are affected by several factors such as reservoir pressure, well configuration and surface facilities. The Habiganj well no. 06 (HBJ-06) is one of the significant gas-producing vertical wells of the Habiganj gas field, currently producing 14.963 MMscfd of natural gas from the upper gas sand. The widely used Nodal analysis is an optimization technique to improve the performance and was applied for the HBJ-06 to increase its production rate by optimizing manners. By this analysis, each component starting from the reservoir to the outlet pressure of the separator was identified as a resistance in the system by evaluating their inflow performance relationship and vertical lift performance. The F.A.S.T. VirtuWell™ software package was used to perform this analysis, where the declinations of wellhead pressures were suggested as 1300, 1200, 1100 and 1000 psi(a) without any modification of the tubing diameter and skin factor. Hence, the respective optimized rates of the daily gas production were increased to 38.481, 40.993, 43.153 and 46.016 MMscfd. At the same time, the optimized condensate gas ratio was calculated as 0.07, 0.06, 0.06 and 0.05, associated with the optimized condensate water ratio of 0.11, 0.10, 0.09 and 0.08, respectively. Keywords Nodal analysis · Gas production optimization · F.A.S.T VirtuWell™ · IPR · VLP · Habiganj gas field List of symbols μ Average viscosity ∆ptotal Total pressure c Coefficient from well data h Reservoir height (pay zone) k Permeability * Md. Shaheen Shah [email protected] * Md Hafijur Rahaman Khan [email protected] 1
Department of Oil and Gas Engineering, Memorial University of Newfoundland, St. John’s, Newfoundland A1C 5S7, Canada
2
Department of Petroleum and Mining Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh
3
Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
4
Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 510301, China
5
University of Chinese Academy of Sciences, Beijing 100049, China
n Exponent obtained from well tests Pi Initial pressure Pr Average reservoir pressure ptf Tubing flowing pressure Pwf Bottom-hole flowing pressure q Production rate Qg Gas production rate Qw Water production rate Qc Condensate production rate re Radius of reservoir rw Production tube diameter s Skin Z Gas compressibility factor Abbreviations AOF Absolute open flow BGFCL Bangladesh Gas Field Company L
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