| 摘要 |
Conventional injection tests conducted on petroleum operating wells are effected by measuring the hydraulic characteristic quantities of the fluid injected into the well (mainly pressure, temperature, flowrate). The present invention adds microseismic measurements representative of the acoustic emission induced by injection and employs a probe constituted by a tube combination mainly containing tubular cartridges interconnected by flexible cables with at least some of the cartridges housing means to measure the microseismic quantities representative of the acoustic emission induced by the injection of a fluid into the well. All the cartridges have a sufficiently small diameter so as to be engaged inside tubing disposed in the well. The present invention is also directed to a measurement method using this probe during an injection test including at least one period for injecting the fluid, followed by a no injection period, the tubing of the well including at least one perforation level, wherein the probe is lowered into the well and then is immobilized close to the perforation level so as to measure at least the microseismic quantities, preferably associated with hydraulic quantities, at least during the no injection period. Apart from obtaining a more accurate picture of the injectivity of the well, the present invention thus concerns a test procedure much better adapted to actual requirements (via the modularity of the probe) and one which is much less cumbersome (the probe carrying out several measurements during a single to-and-fro movement in the well).
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