Method and apparatus for sampling formation fluids
AssigneeSchlumberger Technology Corporation
InventorsAnthony R.H. Goodwin, Peter S. Hegeman
Life of this patent
Estimating the term…
Abstract
A method of retrieving a formation fluid from a formation adjacent a borehole wall includes estimating at least one of a permeability of the formation and a viscosity of the formation fluid. A first tool is selected based on the estimation, the first tool being selected from one of a heating and sampling tool, an injection and sampling tool, and a coring tool. An attempt to retrieve a formation fluid sample from the formation is then made with the first tool, and a formation fluid sample is retrieved from the formation. A second retrieval process may then be initiated, in which the second retrieval process includes increasing the mobility of the formation fluid.
Claims13
A method of retrieving a formation fluid from a formation adjacent a borehole wall, comprising:
- lowering a tool into the wellbore;
- initiating a first retrieval process, the first retrieval process including attempting to increase the mobility of the formation fluid;
- measuring at least one downhole parameter related to the mobility of the fluid;
- changing the first retrieval process based on the measured downhole parameter;
- initiating a second retrieval process, the second retrieval process including increasing the mobility of the formation fluid;
- and
- retrieving the formation fluid sample from the formation with the tool.
Dependencies are inferred from the claim text.