Engineering new oil recovery methods. [1800-3,000 psi]

Journal Article · Sun Jun 01 04:00:00 EDT 1969 · Pet. Eng.; (United States)

OSTI ID:5352132

Crawford, P B

In the LPG slug process, propane under normal pressures of a few hundred psi and temperatures in the order of 150/sup 0/F is a liquid. With the methane-LPG slugs, an LPG slug miscible displacement program may be operated at fairly shallow depths. Even if the reservoir depth is only 1,500 ft, it would be possible to carry out an LPG slug miscible displacement program. It is not difficult to maintain miscibility between methane and propane. A crude of very low viscosity should be selected to reduce solvent dispersion and costs of a miscible displacement project. It is necessary that the LPG slug be of sufficient size so that miscibility does not break down prematurely and result in a very low oil recovery. Enriched gas drives are designed to achieve miscible displacement at pressures ranging from about 1,800 to 3,000 psi. Miscibility may also be achieved at pressures outside this range.The cost of establishing a miscible zone in LPG or enriched gas drives can be quite expensive. In the case of an enriched gas drive, size of the zone becomes quite large. Although the size of the zone may be fairly small for the case of LPG slugs, the cost of acquiring the LPG can be prohibitive, in some cases.

• Research Organization: Texas Petroleum Res Comm
• OSTI ID: 5352132
• Journal Information: Pet. Eng.; (United States), Journal Name: Pet. Eng.; (United States) Vol. 41:6; ISSN PENGA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030900 -- Natural Gas-- Artificial Stimulation
Plowshare-- (-1989)
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
HIGH PRESSURE
LIQUEFIED GASES
LIQUEFIED PETROLEUM GASES
LIQUIDS
MISCIBLE-PHASE DISPLACEMENT
NATURAL GAS LIQUIDS
NATURAL GAS WELLS
OIL WELLS
PETROLEUM PRODUCTS
RECOVERY
STIMULATION
WELL STIMULATION
WELLS