Designing a Mobility Control Foam for Western Venezuela Reservoirs: Experimental Studies SPE 69543
Language: Inglés Series: Romero, C ; Publication details: Dallas, Texas Society of Petroleum Engineers 2001Online resources: Summary: This paper presents the results of laboratory tests, performed in a mobility control foam design for Western Venezuelan Reservoirs. In this operational area, two Water Alternate Gas (WAG) injection projects are currently under way using natural gas, but they are expected to change to nitrogen. The tests presented in this paper were performed mainly with nitrogen, although a final displacement test was designed using fluids that are currently under use in the Lagocinco VLE WAG injection project. The final goal was to achieve a mobility control foam, for gas profile modification in WAG injector wells. The experimental work was divided in several steps: (1) preliminary screening tests for adequate surfactant selection; (2) mobility reduction tests at average Western Venezuelan conditions; (3) adsorption tests; and (4) a final displacement test in a composite reservoir core using fluids and conditions for the Lagocinco VLE Field. The selected surfactant for the foam was an alpha oleofinsulfonate (AOS) combined with a fluorinated surfactant for added stability to oil. Surfactant-gas co-injection was used in all core displacement tests as injection scheme. The foam achieved a Mobility Reduction Factor (MRF) of 100 at average Western Venezuelan conditions, while at Lagocinco VLE conditions the MRF values were as high as 800.| Current library | Status | Barcode | |
|---|---|---|---|
| Biblioteca virtual | Not for loan | 200003107 |
This paper presents the results of laboratory tests, performed in a mobility control foam design for Western Venezuelan Reservoirs. In this operational area, two Water Alternate Gas (WAG) injection projects are currently under way using natural gas, but they are expected to change to nitrogen. The tests presented in this paper were performed mainly with nitrogen, although a final displacement test was designed using fluids that are currently under use in the Lagocinco VLE WAG injection project. The final goal was to achieve a mobility control foam, for gas profile modification in WAG injector wells. The experimental work was divided in several steps: (1) preliminary screening tests for adequate surfactant selection; (2) mobility reduction tests at average Western Venezuelan conditions; (3) adsorption tests; and (4) a final displacement test in a composite reservoir core using fluids and conditions for the Lagocinco VLE Field. The selected surfactant for the foam was an alpha oleofinsulfonate (AOS) combined with a fluorinated surfactant for added stability to oil. Surfactant-gas co-injection was used in all core displacement tests as injection scheme. The foam achieved a Mobility Reduction Factor (MRF) of 100 at average Western Venezuelan conditions, while at Lagocinco VLE conditions the MRF values were as high as 800.
