核心期刊网首页> 外文期刊> 化工 & 能源

Special features of fracture network in Iranian fractured reservoirs


U raspucanim le?i?tima nafte zbog postojanja dva razli?ita tipa porozne sredine, nazvane blokovi matriksa i pukotine, postoji vi?e vrsti pona?anja le?i?ta. Zbog kompleksnosti strukture raspucanih le?i?ta, pridobivanje nafte je rezultat kombinacija nekoliko mehanizama proizvodnje kao ?to su gravitacijsko dreniranje i apsorpcija. Kapilarne i gravitacijske sile su dvije glavne sile koje kontroliraju ove mehanizme proizvodnje. Ovaj rad je usredoto?en na utjecaj kapilarnog tlaka pukotina koji je razli?it od nule, relativnu propusnost pora koje nisu pravocrtne, pojavu reinfiltracije, visinu bloka matriksa i pona?anje aktivnih mehanizama u raspucanim le?i?tima za vrijeme prirodnog iscrpljivanja le?i?ta i injektiranja nemje?ljivog plina. Terenske studije simulacije polja napravljene su kori?tenjem simulatora ECLIPSE s formulacijom obi?ne sirove nafte i opcijom dvostruke poroznosti. Rezultati simulatora, obzirom na relativnu propusnost pora koje nisu pravocrtne, pokazuju da utjecaj tog parametra na pona?anje le?i?ta ovisi ne samo o fizi?kim svojstvima pukotina ve? i o kapilarnom tlaku praga matriksa i visini bloka matriksa.rnRezultati simulacije pokazuju da je na pridobivanje nafte utjecao, u rasponu od 1% do 2%, razmatrani kapilarni tlak praga matriksa od 0,007 bara (0,1 psi) do 0,214 bara (3,1 psi). Isto tako na pridobivanje nafte utje?e, u rasponu od 1,5% do 0,5%, razmatrana visina bloka matriksa od 4,57 m (15 f5) do 18,29 m (60 ft). Na?i rezultati simulacije sugeriraju da je za raspucana le?i?ta s malom visinom bloka ili velikim kapilarnim tlakom praga matriksa, neophodno izna?i adekvatnu, od nule razli?itu, krivulju kapilarnog tlaka pukotina. Nakon toga smo prou?ili djelovanje relativne propusnosti zakrivljenih pora na pona?anje le?i?ta. Rezultati su istaknuli ovisnost utjecaja relativne propusnosti nelinearnih pukotina na visinu bloka matriksa. Rezultati simulacije dobiveni primjenom razli?itih visina bloka matriksa pokazuju pove?anje iscrpka u rasponu od 2,3% do 5,2%, primjenom injektiranja nemje?ljivog plina. Stoga su ovi rezultati pokazali da le?i?ta s najvi?im blokom matriksa mogu biti dobri kandidati za primjenu injektiranja nemje?ljivog plina.%Due to the presence of two different types of porous media, namely matrix blocks and fractures; there are varieties of reservoir performance behaviors in fractured oil reservoirs. Because of this complex structure of fractured reservoirs, oil recovery is the result of the combination of several production mechanisms such as gravity drainage and imbibition. Two main forces controlling these production mechanisms are capillary and gravity forces.rnThis work is focused on the influence of non-zero fracture capillary pressure, non-straight line fracture relative permeability, reinfiltration phenomenon and matrix block height on the performance of active mechanisms in fractured reservoirs during natural depletion and immiscible gas injection project. The field simulation studies were performed using ECLIPSE commercial simulator with black oil formulation and dual porosity option. Simulator results considering non-zero fracture capillary pressure indicated that the influence of this parameter on reservoir performance depended not only on fracture physical properties, but also it depended on matrix threshold capillary pressure and matrix block height. Simulation results indicated that oil recovery was affected by the range from 1 % to 2% considering matrix threshold capillary pressure of 0.1 psi (0.007 bar) to 3.1 psi (0.214 bar). Also oil recovery was affected by the range from 1.5% to 0.5% considering matrix block heights of 15 ft (4.57 m) to 60 ft (18.29 m). Our simulation results suggest that for the fractured reservoirs with small block heights or with large matrix threshold capillary pressure, the appropriate non-zero fracture capillary pressure curve is necessary. Subsequently we have investigated the effect of non-straight line fracture relative permeability on reservoir performance. The results emphasized that the matrix block height depended on the influence of linear line fracture relative permeability. Simulation results acquired by applying different matrix block heights indicated the enhancement in oil recovery by immiscible gas injection in the range from 2.3% to 5.2% considering matrix block heights of 15 ft (4.57 m) to 60 ft (18.29 m). Hence, these results showed that the fractured reservoirs with the highest matrix block heights could be good candidates for implementing the immiscible gas injection operation.......

【作者名称】: S. Razzagh Famian, M. Masihi
【作者单位】: Department of Chemical & Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran, Iran, PO Box 11365-9465, Department of Chemical & Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran, Iran, PO Box 11365-9465
【关 键 词】: fractured reservoirs, capillary pressure, reinfiltration, block-to- block interaction
【期刊名称】: Oil
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 108,463,420
【摘要长度】: 4,546
【上篇论文】: 外文期刊 - УТИЦАJ ЗАОБЛЕНА КРИСТАЛА ДЕТЕКТОРА НА ИЗРАЧУНАВАНЕ ЕФИКАСНОСТИ ДЕТЕКЦИJЕ ГАМА-ЗРАЧЕНА -ТЕОРИJСКА РАЗРАДА ИrnПРИМЕНА У СОФТВЕРУ ANGLE ACCOUNTING FOR DETECTOR CRYSTAL EDGE ROUNDING IN GAMMA-EFFICIENCY CALCULATIONS: THEORETICAL ELABORATION AND APPLICATION IN ANGLE SOFTWARE
【下篇论文】: 外文期刊 - Kokkasho Reprocessing Project From Design to the End of Active Tests: 21 Years of Fruitful French-Japanese Cooperation

【论文下载】: 免费获取 该期刊&论文全文内容