Testing imbibition of fluid
A convenient method of testing imbibition of one or more imbibant fluids by a matrix of particles with a fluid already therein, comprises making a body 4 of packed particles with a matrix fluid filling the interstices between the particles, placing an imbibant fluid in each of a plurality of capillaries 6, 7, partially inserting each capillary into the body 4 so that part of the capillary with imbibant fluid therein projects from the body 4 and observing time for fluid to be taken from each capillary into the body. The method allows comparison of multiple imbibant fluids by placing each fluid in a respective capillary.
1. A method of testing imbibition of an imbibant fluid by a matrix of particles with a fluid therein, comprising:
making a body of packed particles with a matrix fluid filling the interstices between the particles;
placing an imbibant fluid in a capillary;
partially inserting the capillary into the body, so that part of the capillary with imbibant fluid therein projects from the body; and
observing time for fluid to be taken from the capillary into the body.
2. A method according to claim 1 , wherein the time which is observed is the time for the surface of the imbibant fluid in the capillary to travel between two points on the capillary.
3. A method according to claim 1 , wherein the body of particles is formed by filtration of a slurry of the particles.
4. A method according to claim 1 , wherein the body of particles is formed by filtration of a slurry of the particles followed by introduction of the matrix fluid.
5. A method according to claim 1 , comprising:
placing an imbibant fluid in each of a plurality of capillaries;
partially inserting each capillary into the body, so that part of the capillary with imbibant fluid therein projects from the body; and
observing time for fluid to be taken from each capillary into the body.
6. A method according to claim 1 or any other previous claim wherein the matrix fluid is a hydrocarbon oil phase and the or each imbibant fluid is an aqueous solution.