METHOD OF LOCATING HYDROCARBON PRODUCING STRATA AND THE INSTRUMENT THEREFOR

摘要

METHOD OF LOCATING HYDROCARBON PRODUCING STRATA AND THE INSTRUMENT THEREFOR A cylinder is mounted to descend a borehole for purposes of measuring the mass flow rate of gas flowing upward in the borehole. Within the cylinder is a source of tracer gas which is ejected at a constant mass flow rate from near the lower end of the cylinder. A tracer gas concentration measuring means near the top of the cylinder will measure the degree of concentration of the tracer gas and thereby provide a measurement of the mass flow rate of other gases flowing upwardly around the cylinder