REASONABLE VELOCITY OF N2 INJECTION NONMISCI2 BLE FLOODING IN TILTINGMULTILAYER RESERVOIR

doi:10.3863/j.issn.1000-2634.2002.05.011

西南石油大学学报(自然科学版) ›› 2002, Vol. 24 ›› Issue (5): 34- 36.DOI: 10.3863/j.issn.1000-2634.2002.05.011

• 石油工程 • Previous Articles Next Articles

REASONABLE VELOCITY OF N2 INJECTION NONMISCI^₂BLE FLOODING IN TILTINGMULTILAYER RESERVOIR

XIONG Yu SUN Liang-tian SUN Lei PAN Xiao-xia ZHAO Ming

Southwest Petroleum Institute , NanchongSichuan 637001 , China

Received:2002-01-21 Revised:1900-01-01 Online:2002-10-20 Published:2002-10-20
Contact: XIONG Yu

Abstract

Abstract: Gas injection velocity has strong effected on oil recovery fornonOmiscible flooding. Based on theoretical model of twoOdimensional displacement in porous media and interface stability condition of N₂ nonOmiscible flooding after waterflooding , the determination method of reasonable N₂ injection velocity limit and the performance analysis ways as to tilting multilayer reservoir have been presented in this paper by taking both permeability and effective gas imbibition thickness into account . It has been found that reasonable N₂ injection velocity is proportional to the product of permeability by effective gas imbibition thickness , and reasonable N₂ injection velocity must be less than minimum value of maximum N₂ injection velocity in all layers.
Partial stability will occur when N₂ injection velocity is greater than minimum velocity and less than maximum velocity. Oil recovery will gradually decrease in such situation. Comparing results from N₂ injection performance analysis of actual reservoir with that of simulation indicated that methods presented in the paper are reasonable and effective ways for determining reasonable N²injection velocity and analyzing injection performance in tilting multilayer reservoir.

Key words: non miscible flooding, stability, EOR, gas injection

CLC Number:

TE357

XIONG Yu SUN Liang-tian SUN Lei PAN Xiao-xia ZHAO Ming. REASONABLE VELOCITY OF N2 INJECTION NONMISCI^₂BLE FLOODING IN TILTINGMULTILAYER RESERVOIR[J]. 西南石油大学学报(自然科学版), 2002, 24(5): 34- 36.

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REASONABLE VELOCITY OF N2 INJECTION NONMISCI^₂BLE FLOODING IN TILTINGMULTILAYER RESERVOIR

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