방향성 시추를 위한 RSS 기술특성 및 적용사례 분석
Investigation on the Technical Characteristics and Test Cases of RSS for Directional Drilling
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초록
RSS(rotary steerable system)는 시추 비트의 각을 변화시키거나 횡력을 가하여 즉각적인 방향제어가가능한 기술로써, 높은 굴진율로 시추기간을 단축시켜 시추비용을 절감할 수 있다는 장점을 갖고 있어 대규모의유·가스전 개발뿐만 아니라 셰일가스 등의 비전통자원개발에 널리 적용되고 있다. 본 연구에서는 RSS의 작동메커니즘에 관한 기술적 특징에 대해 고찰하고 시추 시험을 수행한 실험실 및 현장 프로젝트 사례를 소개하였다. 실험실 시험사례를 통해 RSS의 방향성 거동 예측이 가능함을 확인하였으며, 현장 적용사례 분석 결과 슬라이드없이 작업해 굴진율이 증가함으로써 시추시간이 단축됨을 확인하였다. 다양한 콘크리트 강도와 비트 특성에따른 방향성 거동 분석 결과는 향후 국내외 유전 개발 시 RSS를 이용한 방향성 시추 계획 수립 및 적용에활용할 수 있을 것으로 판단된다.
Abstract
The rotary steerable system(RSS) is technically capable of controlling a direction during drilling bychanging angle of bits or applying lateral force. The RSS has an advantage which is reducing the drilling timedue to its high rate of penetration(ROP). RSS has been widely applied to develop oil and gas reservoir, as wellas unconventional resources such as shale gas. This study presents technical characteristics about mechanism ofthe RSS operating and introduces laboratory experimental cases and field projects. Laboratory tests show thatit is possible to predict directional behavior of RSS. Furhemore, field projects show that the drilling time is reducedby the increasing ROP since slide was not required. The results in the directional behavior by various concretestrength and bit characteristics can be used to build and apply to a directional drilling plan for oil and gas fielddevelopment.
참고문헌 (15)
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