Naslov
Thermally Induced Fracturing in Waterflooding

Autori
Čikeš, Marin

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
IOR Methods for Economical Recovery from Small Size and/or Marginal Oil Fields / - Zagreb : Rudarsko-geološko-naftni fakultet Sveučilišta u Zagrebu, 2004, 31-43

Skup
Petroleum Engineering Summer School, Workshop 14

Mjesto i datum
Dubrovnik, Hrvatska, 07.06.2004. - 11.06.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Thermally induced fracturing
(thermally induced fracturing)

Sažetak
Thermally induced fracturing (TIF) is well known process that spontaneously occurs during injection of a cold fluid into the hot formation. As the numerous pressure fall-off test analyses prove that, TIF happens during waterflooding in many cases. Although waterflooding is normally designed so that injection pressure do not exceed fracturing pressure, pressure fall-off test analyses usually show the presence of the fracture, which can be attributed to the thermally induced fracturing. The final result of a water injection under such conditions is an unfavorable vertical injectivity profile, i.e. the low permeable layers accept less and less fluid, while the main stream goes into the high permeable zone. This problem can be solved by appropriate placement the perforated interval and subsequent initiation of the fracture hydraulically in a low permeable zone. Immediate water injection, at a rate enough to keep opened the hydraulic fracture, will provoke the TIF in low permeable layers and allow slowly fracture growing into the unperforated highly permeable zones. Finally, all zones will be connected by the fracture and each zone will take fluid proportionally to its thickness-permeability product.

Izvorni jezik
Hrvatski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo

POVEZANOST RADA