Title | Unified Pressure and Rate Transient Analysis of Production and Shut-in Data from Fractured Horizontal Wells |
Publication Type | Conference Paper |
Year of Publication | 2021 |
Authors | Wang, H., and M. M. Sharma |
Conference Name | SPE Hydraulic Fracturing Technology Conference and Exhibition |
Date Published | 05/2021 |
Publisher | Society of Petroleum Engineers |
Conference Location | Virtual, May 4-6, 2021 |
Other Numbers | SPE-204136-MS |
Abstract | Market-induced production shut-downs and restarts offer us an opportunity to gather step-rate and shut-in data for pressure transient analysis (PTA) and rate transient analysis (RTA). In this study, we present a unified transient analysis (UTA) to combine PTA and RTA in a single framework. In this new approach continuous production data, step-rate data, shut-in data and re-start data can be visualized and analyzed in a single superposition plot, which can be used to estimate both and infer formation pore pressure in a holistic manner by utilizing all available data. Most importantly, we show that traditional log-log and square root of time plots can lead to false interpretation of the termination of linear-flow or power-law behavior. Field cases are presented to demonstrate the superiority of the newly introduced superposition plot, along with discussion on the calibration of long-term bottom-hole pressure with short-term measurements. |
DOI | 10.2118/204136-MS |