수압파쇄 생산정에서 유정시험을 통한 사후 평가
Post-Fracturing Evaluation of a Hydraulic-Fractured Well Using Well Testing Interpretation
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초록
수압파쇄법은 투과도가 좋지 않아 생산성이 낮은 유정에 높은 압력으로 유체를 주입하여 인위적으로 균열을 발생시키는 방법이다. 이러한 방법을 통해 매장량과 생산량을 동시에 늘릴 수 있다. 수압파쇄 후 그 결과를 평가하는 것은 향후 인접 유정에 대해 수압파쇄를 수행할 때 기준이 될 뿐만 아니라 전체 필드에서 생산정 시추에 대한 전략을 수립할 때 중요한 역할을 한다. 수압파쇄 후 평가하는 방법은 지구물리적인 방법으로 생성된 균열을 탐지하는 직접적인 방법과 유정시험 및 생산량을 분석하는 간접적인 방법이 있다. 이 연구에서는 수압파쇄 적용 후 유정시험 및 생산량에 대한 분석을 통해 수압파쇄 작업 결과를 평가하였다. 그 결과 유정 주위에 균열이 양호하게 생성되었으며 생산량이 급증하여 성공적인 수압파쇄 작업이었음을 확인하였다.
Abstract
Hydraulic fracturing is a technique to fracture low-permeability reservoir by injecting special engineered fluids at high pressure. Through this technique, both of reserves and production volume can be increased. Post-fracture evaluation is an important work because it can support not only to conduct another hydraulic fracturing of adjacent wells but also to develop a drilling strategy for optimized production. Post-fracture evaluation method can be divided into direct method, which detects fractures geophysically, and indirect method such as well testing interpretation and production analysis. In this paper, post-fracture evaluation is conducted by well testing interpretation and production analysis. As a result, it is confirmed that vertical fracture was created effectively so it enhances production rate of the well. Therefore it can be concluded that this hydraulic fracturing was conducted successfully.
참고문헌 (16)
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