초록 ▼

A method of determining the volume of a test fluid injected into a section of an underground cavity, and thereby also the volume of the section, utilizes pressurization data with respect to another fluid, such as brine, to derive a compressibility ratio according to one aspect of the invention which

A method of determining the volume of a test fluid injected into a section of an underground cavity, and thereby also the volume of the section, utilizes pressurization data with respect to another fluid, such as brine, to derive a compressibility ratio according to one aspect of the invention which is used in conjunction with brine pressure values measured during test fluid injection to determine the cavity section volume.

대표청구항 ▼

A method comprising: (a) filling an underground cavity with a first fluid; (b) pressurizing the cavity by injecting further first fluid into the cavity after step (a) until a predetermined first fluid pressure is reached; (c) measuring the total volume of first fluid injected into the cavity in step

A method comprising: (a) filling an underground cavity with a first fluid; (b) pressurizing the cavity by injecting further first fluid into the cavity after step (a) until a predetermined first fluid pressure is reached; (c) measuring the total volume of first fluid injected into the cavity in step (b) and also measuring the corresponding first fluid pressure at a plurality of points during step (b) to yield a set of volume-pressure data pairs, wherein each data pair includes a volume value V and a corresponding first fluid pressure value P; (d) fitting a linear mathematical function relating V and P to the set of data pairs; (e) injecting a second fluid into the cavity after step (b) so as to form an interface between the first fluid and the second fluid, the interface being moved during said second fluid injection from a first level to a second level, wherein the first and second levels define therebetween a cavity section which is occupied by second fluid at the completion of this step; (f) measuring the first fluid pressure when the interface is at the first level and also the first fluid pressure when the interface is at the second level; and (g) determining the volume of second fluid occupying the cavity section by utilizing the pressure values measured in (f) and the linear mathematical function of (d), said volume of second fluid also being the volume of the cavity section.