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2010 Vol.47, Issue 5 Preview Page
Enhanced Gas Recovery and Its Application

가스전 회수증진 기술 동향 및 적용사례

임종세, 서광원, 이선아, 이정환, 안승희, 신창훈

Jong-Se Lim, Kwangwon Seo, Sun-A Lee, Jeonghwan Lee, Seunghee An and Changhoon Shin

31 October 2010. pp. 798-808
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Abstract
Enhanced gas recovery means to increase gas production when a reservoir is difficult to produce commercially natural gas. There are several engineering approaches such as water shut off, CO2 injection, infill drilling, hydraulic fracturing etc. in enhanced gas recovery technique. The water shut off is a technique that control water production by applying various mechanical and chemical methods in the case that a production well has trouble with excessive water production from aquifer. The CO2 injection is method to improve natural gas production by injecting CO2 into reservoir for re-pressurization of the reservoir and displacement of natural gases. This method has been received attention recently because of its possibility for connecting with carbon capture and sequestration technique. To apply the infill drilling technique, petrophysical properties in reservoir are estimated by analysing static and dynamic data from the gas production field and a location of infill drilling are determined by various analysis techniques like ‘Moving Window’ method, reservoir simulation based method etc. The hydraulic fracturing is the way to enhance mobility and connectivity by creating artificially fractures in well vicinity. In this study, various methods for enhancing gas recovery are investigated and its applications are analysed.
Keywords
Enhanced gas recovery
Water shut off
CO2 injection
Infill drilling
Hydraulic fracturing
가스전 회수증진은 상업적 생산이 어려운 저류층에 대해 다양한 생산기법을 적용함으로써 회수율을 증진시키는 것을 의미한다. 가스 회수증진 기법으로는 지층수 차단, 이산화탄소 주입, 추가 시추, 수압파쇄 등이 있다. 지층수 차단은 대수층으로부터 다량의 물이 유입되는 시추공에 기계적 및 화학적 기법을 적용함으로써 물의 생산을 억제하는 방법이다. 또한 최근 이산화탄소 지중처분기술과 연계하여 이산화탄소를 주입하여 저류층을 재가압하고 가스를 대체함으로써 회수율을 증진시키는 방법이 주목받고 있다. 추가 시추의 경우 기생산 가스전의 정적 및 동적 자료를 해석하여 저류층의 물성을 파악하고 ‘Moving Window’ 기법, 저류층 시뮬레이션 기반 기법 등을 통해 생산성을 향상시킬 수 있는 위치를 선정하여야 한다. 수압파쇄법은 시추공 부근에 인공적인 균열대를 형성하여 저류층의 유동도 및 연결성을 향상시키는 방법이다. 이 연구에서는 다양한 가스회수증진 기법에 대해 조사하고 각각에 대한 적용사례를 분석하였다.
키워드
가스 회수증진
지층수 차단
이산화탄소 주입
추가 시추정 시추
수압파쇄법
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Information
  • Publisher :The Korean Society of Mineral and Energy Resources Engineers
  • Publisher(Ko) :한국자원공학회
  • Journal Title :Journal of the Korean Society for Geosystem Engineering
  • Journal Title(Ko) :한국지구시스템공학회지
  • Volume : 47
  • No :5
  • Pages :798-808
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