화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.25, No.3, 262-267, June, 2014
Export Citation
고온 고압 스팀을 주입하는 SAGD 공정에서 CO2주입이 오일샌드 역청 회수율에 미치는 영향
Effect of CO2 Injection in SAGD Process for Oil Sand Bitumen Recovery
송병진1, 2, 유난숙1, 이재훈3, 이철위1, †
  • 1한국화학연구원 그린화학공정연구본부
  • 2성균관대학교 화학과
  • 3에너지관리공단
Byung Jin Song1, 2, Nansuk You1, Jae Hoon Lee3, and Chul Wee Lee1, †
  • 1Division of Green Chemistry & Engineering Research, Korea Research Institute of Chemical Technology (KRICT), Daejeon 305-600, Korea
  • 2Department of Chemistry, Sungkyunkwan University, Gyeonggi-do 440-746, Korea
  • 3Korea Energy Management Corporation, Gyeonggi-do, 448-994, Korea
E-mail:
초록
오일샌드에서 비투맨(bitumen)을 회수하는 지하회수방식 중 가장 많이 사용하는 기술인 SAGD (steam assisted gravity drainage)공정으로부터 비투맨의 회수율을 향상시키고자 스팀과 함께 주입한 첨가제의 효과와 매커니즘에 대해서 연구하였다. 실제 광구에서 쓰이는 SAGD공정을 150 : 1로 축소한 실험실 규모의 모사장비가 사용되었으며, 지하 박층을 모사할 수 있는 장치(이하 GM, geological model)가 사용되었다. 초중질유와 글래스비드(glass bead 1.5 mm)의 혼합물은 오일샌드의 모사재료로 사용되었다. 첨가제로서 CO2가 사용되었으며, 스팀 챔버(steam chamber)의 성장 변화를 비교분석하였다. CO2의 주입방식에 따른 효과를 확인하기 위하여 스팀과 CO2를 연속 주입하는 실험(cCO2-SAGD)과 순차적으로 주입하는 실험(sCO2-SAGD)을 실시하였다. 그 결과 sCO2-SAGD 실험의 경우 Control 실험 대비 오일 회수율은 60.2%에서 69.3%로 향상되었으며 cSOR의 경우 7.1에서 6.0으로 낮아졌다. 반면에 cCO2-SAGD 실험의 경우 60.2%에서 57.6%, 7.1에서 7.3으로 증가 되었다.
SAGD (steam assisted gravity drainage) process is the most commonly used in-situ technology for the recovery of bitumen from oil sand. It was investigated that the effects of different additives on bitumen recovery rate from oil sand in SAGD process among many possible mechanisms studied throughout the study. Bitumen recovery from thin layer oil sand reservoirs was simulated by using an experimental SAGD apparatus with scale of 150:1. To improve the simulation accuracy of thin layer oil reservoir, we have attached geological model (GM). Oil sand was simulated by using a mixture of extra heavy oil and glass beads with a diameter of 1.5 mm. CO2 was used as an additive and the evolution of steam chambers were closely monitored, and the effects of CO2 as an additive was investigated. Two types of injection methods were tested; continuous(cCO2-SAGD) and sequential interruption (sCO2-SAGD) CO2 injection. For the sCO2-SAGD experiment, it was observed that the recovery rates and CSOR were efficiently improved control experiment from 60.2% to 69.3% and 7.1 to 6.0, respectively, whereas cCO2-SAGD experiment decreased from 60.2% to 57.6% and 7.1 to 7.3.
Keywords:Oil sand;SAGD;Bitumen;Additives;CO2
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