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Technology
Assessment & Research (TA&R) Program
| Project Number |
276 |
| Date of Summary |
May 01, 2000 |
| Subject |
Mitigating the Problem of Gas
Migration After Primary Cementing |
| Performing Activity |
Westport Technology Center International |
| Principal Investigator |
Mr. Cyrus Irani |
| Contracting Agency |
Minerals Management Service |
| Estimated Completion |
December 1, 1999 |
| Description |
This is a Joint
Industry Project (JIP). Two tasks were set for the project:
1) Develop a comprehensive understanding of
the nature and extent of the gas migration problem. A survey form was
prepared, interviews with cementing experts are taking place, and a
database of relevant information is being developed;
2) Conduct screening studies of existing remedial
solutions.
Fluids of 1 cP and higher viscosity are commercially
available, and the sponsors will pick three of them for screening. The second group of
fluids to be evaluated will be 0.5 cP and lower systems involving polymers dissolved in
light hydrocarbons. Westport will develop an ethane and propane based system for testing.
A bundle of capillary tubes of different diameters will be used to screen the pumpability
of the different fluids through simulated fractures. |
| Progress |
Westport has experienced problems
with placing enough of its low viscosity polymer plugging system into the test
microfractures. The commercial higher viscosity systems are delivering more plugging agent
than the low viscosity formulations. Westport will therefore begin testing higher
viscosity polymer systems and taking advantage of the fact that the polymer system has
zero set time (it is activated by pressure drop). |
| Report |
|
AA
(58
pages) |
Irani, Cyrus A. Mitigating the
Problem of Gas Migration Final Report CEA-96, Westport Technology Center International.
June 26, 2000. |
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