Apparatus and methods for characterizing a reservoir

摘要

An apparatus comprising a downhole tool configured for conveyance within a borehole penetrating a subterranean formation, wherein the downhole tool comprises: a probe assembly configured to seal a region of a wall of the borehole; a perforator configured to penetrate a portion of the sealed region of the borehole wall by projecting through the probe assembly; a fluid chamber comprising a fluid; and a pump configured to inject the fluid from the fluid chamber into the formation through the perforator.

主权项

1. An apparatus for conveyance within a borehole extending into a subsurface formation, the apparatus comprising:
a probe assembly disposed in a first portion of a tool body; an actuator configured to move the probe assembly between a retracted position and a deployed position, wherein the probe assembly is configured to seal a region of the borehole wall when in the deployed position; a perforator configured to penetrate the borehole wall at a plurality of azimuthal locations within the borehole by projecting through the probe assembly; a swivel coupled to the probe assembly to rotate the perforator to the plurality of azimuthal locations within the borehole, wherein the swivel is configured to rotate the probe assembly azimuthally with respect to a second portion of the tool body and the borehole wall, wherein the swivel is coupled between the first portion of the tool body housing the probe assembly and the second portion of the tool body housing an anchor assembly, and wherein the swivel permits rotation of the probe assembly azimuthally within the borehole with respect to the anchor assembly; a flex joint disposed in the first portion of the tool body to permit non-coaxial alignment between the anchor assembly and the probe assembly; a flow line fluidly communicating with the perforator; and a pump carried within the tool body and operatively coupled to the flow line to inject fluid into the subsurface formation through the perforator at the plurality of azimuthal locations within the borehole.