Transient Behavior of Vertical Commingled Well in Vertical Non-Uniform Boundary Radii Reservoir

Bing Sun, Wenyang Shi, Rui Zhang, Shiqing Cheng, Chengwei Zhang, Shiying Di and Nan Cui
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Bing Sun: SINOPEC Petroleum Exploration and Production Research Institute, Beijing 100083, China
Wenyang Shi: State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
Rui Zhang: SINOPEC Petroleum Exploration and Production Research Institute, Beijing 100083, China
Shiqing Cheng: State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
Chengwei Zhang: State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
Shiying Di: State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
Nan Cui: School of Geography, University of Leeds, Leeds LS2 9JT, UK

Energies, 2020, vol. 13, issue 9, 1-13

Abstract: Transient behavior analysis, including rate transient analysis (RTA) and pressure transient analysis (PTA), is a powerful tool to investigate the production performance of the vertical commingled well from long-term production data and capture the formation parameters of the multilayer reservoir from transient well testing data. Current transient behavior analysis models hardly consider the effect of vertical non-uniform boundary radii (VNBR) on transient performances (rate decline and pressure response). The VNBR may cause an obvious novel radial flow regime and rate decline type, which can easily be mistaken as a radial composite reservoir. In this paper, we present a VNBR transient behavior analysis model, the extended vertical uniform boundary radii (VUBR), to investigate the rate decline behavior and pressure response characteristics through diagnostic type curves. Results indicate that the dimensionless production integral derivative curve or pressure derivative curve can magnify the differences so that we can diagnose the outer-convex shape and size of the VNBR. Therefore, it is significant to incorporate the effects of VNBR into the transient behavior analysis models of the vertical commingled well, and the model proposed in this paper enables us to better evaluate well performance, capture formation characteristics and diagnose flow regimes based on rate/pressure transient data.

Keywords: rate transient analysis; pressure transient analysis; vertical commingled well; vertical non-uniform boundary radii; type curve (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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