Pressure transients to characterize cavities dissolved for natural gas storage
| Autor: | Lawrence C. Murdoch, Leonid N. Germanovich, Jong-Won Choi, James W. Castle |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
Natural gas storage Petroleum engineering business.industry 0211 other engineering and technologies Energy Engineering and Power Technology 02 engineering and technology 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Pressure sensor Pipeline transport Fuel Technology Brine Electrical conduit Natural gas Boundary value problem Material properties business 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Journal of Natural Gas Science and Engineering. 33:611-623 |
| ISSN: | 1875-5100 |
| DOI: | 10.1016/j.jngse.2016.03.082 |
| Popis: | This paper describes an analysis of pressure transients in conduits that includes effects of variable conduit diameter and contrasts in fluid material properties. The analysis considers pressure applied to the outside of a submerged conduit, as well as that transmitted along the submerged conduit's interior with potential applications such as analysis of submerged pipelines or tubing in oil wells or in wells used in solution mining. In this work, we present a method for monitoring the dissolution of carbonate rock with acid to create a cavern for storing natural gas. This process includes an acid injection pipe and a brine production pipe submerged in the fluid-filled cavern. The motivation is to characterize the geometry of the cavern by analyzing pressure transients traveling down the acid injection pipe, interacting with the walls of the cavern and compressing the brine pipe, and traveling to a pressure transducer in the brine pipe. The conventional water-hammer equations were modified to include the pressure applied to the outside of a submerged conduit, and the resulting boundary value problems were solved with perturbation analysis. The results show that peak pressure at an observation point decreases more than one order of magnitude when the cavern diameter increases one order of magnitude. This suggests that the proposed approach is sensitive to cavern diameter. Consideration of the external loading provides a potential mechanism for locating an interface between fluids of different properties, such as the interface between acid/CO 2 mixture and underlying brine. |
| Databáze: | OpenAIRE |
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