PEGN 513 Reservoir Simulation I Fall 2009

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1 Hmer #3 l The smples rm r aerld a lear cre ally saraed h l ad a resdal aer sara h gravy r capllary eecs s represeed by he -dmesal Bcley-Levere maeral balace eqa () Eplc sl Csderg he space dscreza sh Fgre he eplc sl hs eqa s gve by () T mprve he cmpa prcess ad avd sg a magary grd a he le he rs de he llg eqa s sed r he rs de These eqas (Eqs. ad 3) ca be slved eplcly r aer sara a he e me sep (). (3) 3 - IMAX- IMAX / / -/ / IMAX-/ Fgre. -dmesal cre space dscreza

2 /8 Implc sl Csderg he space dscreza sh Fgre he mplc sl eqa () s gve by (4) The racal l a me ca be relaed he racal l a me sg he Taylr plymal rs rder (5) bsg (5) (4) ad rerderg a eqa h s ( s a ) s baed (6) Fr de hs eqa ca be slve eplcly as lls / / / / / / / (7) here r / / / A bac-sbs prcedre ca be appled seqeally slve r he res he de saras sg eqa (6). Bh he eplc ad mplc rmlas ere cded MATLAB slve he -dmesal Bcley-Levere prblem. The prcedre slve aalycally r he dervave racal l h respec aer sara s sh a he ed hs repr as a addedm.

3 l r Case : Eplc sl. day IMAX Table shs he vales aer sara r he grd s a days. A pl aer sara prle as a c dsace alg pah l a every ve me seps s sh Fgre. The al cd (a ) crrespds he hrzal le csa aer sara eqal.5 (.e. r ). The gre shs a crease aer sara h me ad h he aer jec r prpagaes alg he -dmesal cre. The spread he crves s a dcave mercal dspers. Table. Waer sara vales r he grd s a days Grd de (rac) Waer ara (rac) Dsace alg pah l () Fgre. Waer sara prle alg he pah l a every ve me seps 3/8

4 l r Case : Eplc sl. day IMAX 5 Table shs he vales aer sara r he grd s a days r Case. A pl aer sara prle as a c dsace alg pah l a every ve me seps s sh Fgre 3. Ths case ses a small ha Case ad mre des; ca be bserve a sharp aer jec r cmpars h he spread crves Case hch meas a decrease mercal dspers h a decrease grd sze he drec. Table. Waer sara vales r he grd s a days. Case Grd de (rac) Grd de (rac) Waer ara (rac) Dsace alg pah l () Fgre 3. Waer sara prle alg he pah l a every ve me seps. Case 4/8

5 l r Case 3: Implc sl. day IMAX Table 3 shs he vales aer sara r he grd s a days Case 3. A pl aer sara prle as a c dsace alg pah l a every ve me seps s sh Fgre 4. I ca be bserve he aer jec r prpaga h me alg he -dmesal cre he rm spread sara crves becase mercal dspers. Table 3. Waer sara vales r he grd s a days. Case 3 Grd de (rac) Waer ara (rac) Dsace alg pah l () Fgre 4. Waer sara prle alg he pah l a every ve me seps. Case 3 5/8

6 l r Case 4: Implc sl. day IMAX 5 Table 4 shs he vales aer sara r he grd s a days r Case 4. A pl aer sara prle as a c dsace alg pah l a every ve me seps s sh Fgre 5. Ths case ses a small ha Case 3 ad mre des eqal Case ; ca be bserve a sharp aer jec r b ha sharp as Case 3 hch meas ha he decrease mercal dspers as less he mplc case. Table 4. Waer sara vales r he grd s a days. Case 4 Grd de (rac) Grd de (rac) Waer ara (rac) Dsace alg pah l () Fgre 5. Waer sara prle alg he pah l a every ve me seps. Case 4 6/8

7 Fgre 6 shs he aer sara prle as a c dsace alg pah l a.5 days (5 me seps) r he r cases csdered. The case ha shs a greaer mercal dspers maesed by a spreader sara crve s Case 3 he mplc sl h carse grd. Fr he mercal parameers (me sep. day ad grd sze ) csdered he eplc Case shs a ler mercal dspers ha he mplc Case 3. A redc he mercal dspers s sh r he cases ad 4 hch have a er grd h he eplc Case shg he sharper aer jec r (.e. he les mercal dspers). As ca be see he eplc rmla ers a ler mercal dspers ha he mplc rmla he he same grd s sze ad me sep s sed..9 Case - Eplc Case - Eplc 5 Case 3 - Implc Case 4 - Implc Waer ara (rac) Dsace alg pah l () Fgre 6. Cmpars he eplc ad mplc Bcley-Levere sl a.5 days r he r cases sded 7/8

8 8/8 Addedm Dervave racal l h respec aer sara r r r r r r λ λ λ r r r r r r r r lvg dervaves relave permeably h respec aer sara r r r r r r r r r r r r r r r r r r r r r r bsg r r r r r r r r r r r r r r r r r r r r r r r

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