03322nas a2200253 a 450000500170000000800410001703500150005810000330007324500960010626000670020230000430026949000280031250001820034050200590052252021120058165000440269365000440273770000370278170000410281870000440285971000390290381000600294285600660300220260817173421.0140127s2012    th      r     000   eng d  a.b121258660 aChalatchawan Surapongshandej10aComparision of in-situ and conventional gas lift for commingled reservoirs in Pattani Basin  aPathum Thani, Thailand :bAsian Institute of Technology,c2012  a1 online resource (80 leaves) :bill. 1 aThesis ;vno. OTM-12-07  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Offshore Technology and Management, School of Engineering and Technology  aThesis (M. Eng.) - Asian Institute of Technology, 2012  aThere  are  many  methods  to  help  lift  oil  to  the  surface.  For  instance,  gas  lift  method.  This approach is widely used to gain more oil recovery than let the oil flow by itself. In this study, gas lift methods, both conventional gas lift and in-situ gas lift, are studied in the deep detail to determine  an  appropriate  way  to  improve  oil  recovery. By  simulation  oil  reservoirs  in  commingled production through using conventional gas lift as a base case and in-situ gas lift cases  in  several  conditions.  There  are  several  conditions  for  in-situ  gas  lift  cases  because  improvement  of  oil  recovery  by  using  in-situ  gas  lift  method  needs  to  find  the  suitable  gas  reservoir  for  good  results  of  oil  recovery. The  parameters  that  effect  amount  of  gas  and  gas  flow  rate  need  to  be  concerned  such  as  permeability  (k),  perforation  interval  (hp),  depth  and  thickness  of  gas  reservoirs  (h). The  results  from  ECLIPSE  simulation  show  that  both  conventional  gas  lift  and  in-situ  gas  lift  can  help  improve  oil  recovery  quite  well.  For  the  variable outcome (permeability, perforation interval, depth and thickness of gas reservoir), the factor  that  directly  takes  effect  to  amount  of  gas  in  gas  reservoir  is  thickness  and  the  other  studied  factors  directly affect    the  gas  flow  rate.  Although  gas  help  lift  up  the  oil,  amount  of  gas and gas rate must not have or flow too high because the excess gas will flow very quicklyup to the surface. Hence, there is not enough time to allow gas blend with oil then oil cannot flow smoothness. By the way, the oil recovery factor comparisons of conventional gas lift case and  in-situ  gas  lift  cases  demonstrate  that  the  conventional  gas  lift  can  improve  oil  recovery  factor  better  than  in-situ  gas  lift  cases.  Nevertheless,  the  conventional  gas  lift  case  spends  more cost than in-situ gas lift cases.  In addition, some it-situ gas lift cases obtain oil recovery production closely the conventional gas lift. 0aGas lift pumpszThailandzPattani Basin 0aGas reservoirszThailandzPattani Basin1 aChiu, Gregory L.F.,eChairperson0 aSuwat Athichanagorn,eCo-Chairperson0 aJirawat Chewaroungroaj,eCo-Chairperson2 aRTG Fellowship,eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. OTM-12-07  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B03626