Berlajut ke tampilan berikutnya .Teknik Reservoir 1

.Perhitungan Cadangan (1)Cadangan (reserve) adalah jumlah hidrokarbon yang dapat diproduksi secara eknomis dari suatu reservoar.Bila diketahui kumulatif produksi, Qp

Global EOR Target in Indonesia

.Perhitungan Cadangan (2)Metode VolumetrikN= OOIP, STBA= luas, acreh= ketebalan, ftf= porositas, fraksiSoi= saturasi minyak awal, fraksiBoi= faktor volume formasi minyak awal, RB/STBRB= reservoar barelSTB= stock tank barrel

.Perhitungan Cadangan (3)RF= recovery factor at pb, % OOIPf= porositas, fraksiSwi= saturasi minyak awal, fraksiBob= faktor volume formasi minyak pada pb, RB/STBk= permeabilitas absolut, Darcymab= viskositas minyak, cPpb= bubble point pressure, psiapa= abandonment pressure, psiaRF untuk solution gas drive reservoar:RF untuk water drive reservoar:RF= recovery factor at pb, % OOIPf= porositas, fraksiSwi= saturasi minyak awal, fraksiBoi= faktor volume formasi minyak awal, RB/STBmwi= viskositas air awal, cPmoi= viskositas minyak awal, cPpi= tekanan awal, psia

.Perhitungan Cadangan (4)Metode Material BalanceExpansion of oil + dissolved gas

.Perhitungan Cadangan (5)Expansion of the gascap gasG= Initial gascap gas, scfBgi= faktor volume formasi gas awal, bbl/scfBg= faktor volume formasi gas pada p

.Perhitungan Cadangan (6)Expansion of the connate water and formationDp= pi - pcw= water compressibility, psia-1cf= formation compressibility, psia-1

.Perhitungan Cadangan (6)Underground withdrawal Np= Cumulative oil produced, STBRp= Cumulative gas oil ratio, scf/STBRs= Initial gas solubility, scf/STB

.Perhitungan Cadangan (6)General Material Balance Equation We= Cumulative water influx from aquifer, STBWp= Cumulative amount of aquifer water produced, STBBw= water formation volume factor, RB/STB

.Perhitungan Cadangan (6)Recovery Factor for Solution Gas Drive Assumed:No initial gascapNo water influx into the oil reservoirAbove bubble point pressure (undersaturated oil reservoir)Below bubble point pressure (saturated oil reservoir)Assumed:Changes in PV is negligible once solution gas develops in the reservoir

*