IDENTIFICATION OF THERMAL CONDUCTIVITY PROPERTIES OF FORMATION FLUID

摘要

A downhole well fluid sensing device is disclosed for determining thermal conductivity of a formation fluid produced by a sampled subterranean well, the sensor package having an annulus shaped, elongate body defining a cylindrical fluid sampling space, the elongate body and the sampling space having a common longitudinal center axis. The elongate body has a fluid entrance port that provides well fluid ingress into the fluid sampling space and a fluid exit port that provides well fluid egress out of the fluid sampling space. A heat source is coupled to the elongate body and located along a portion of the fluid path, and the heat source inputs heat into sampled well fluid. Finally, temperature sensing devices located between the fluid entrance port and fluid exit port measure heat conducted to the sampled well fluid, wherein each of the temperature sensing devices is radially spaced from the heat source.

主权项

1. A downhole well fluid sensing device for determining thermal conductivity of a formation fluid produced by a sampled subterranean well, the sensing device comprising:
an annulus shaped, elongate body interiorly defining a substantially cylindrical fluid sampling space, the elongate body and the sampling space having a common longitudinal center axis; a fluid entrance port providing well fluid ingress into the fluid sampling space; a fluid exit port providing well fluid egress out of the fluid sampling space; an upstream-to-downstream fluid flow path for a sampled well fluid extending from the fluid entrance port to the fluid exit port across the sampling space; a heat source coupled to the elongate body and located along a portion of the fluid flow path between the fluid entrance port and the fluid exit port for inputting heat into the sampled well fluid; and a plurality of temperature sensing devices coupled to the elongate body and located between the fluid entrance port and fluid exit port for measuring heat conducted to the sampled well fluid, wherein each of the plurality of temperature sensing devices is radially spaced from the heat source and wherein the measurement is used to calculate the thermal conductivity of the formation fluid.