이전|다음

오르도스 분지 중동부 석탄암 가스 축적 메커니즘 및 유리 구역 예측 방법

  • role： First author第一作者
  • Affiliation：

    College of Geosciences， China University of Petroleum （Beijing）， Beijing 102249， China

    State Key Laboratory of Petroleum Resources and Engineering， Beijing 102249， China

  • Email：putycup@163.com
  • Introduction：蒲庭玉（2000—），男，博士研究生，油气藏形成机制与分布规律。E-mail：putycup@163.com。
PU Tingyu12,  
  • role： Corresponding author通信作者
  • Affiliation：

    College of Geosciences， China University of Petroleum （Beijing）， Beijing 102249， China

    State Key Laboratory of Petroleum Resources and Engineering， Beijing 102249， China

  • Email：pangxq@cup.edu.cn
  • Introduction：庞雄奇（1961—），男，教授、博士研究生导师，油气藏形成机理与分布规律、含油气盆地分析与资源评价。E-mail：pangxq@cup.edu.cn。
PANG Xiongqi12*,  
  • Affiliation：

    College of Geosciences， China University of Petroleum （Beijing）， Beijing 102249， China

    State Key Laboratory of Petroleum Resources and Engineering， Beijing 102249， China

LIN Hao12,  
  • Affiliation：

    College of Geosciences， China University of Petroleum （Beijing）， Beijing 102249， China

    State Key Laboratory of Petroleum Resources and Engineering， Beijing 102249， China

CHEN Yuxuan12,  
  • Affiliation：

    College of Geosciences， China University of Petroleum （Beijing）， Beijing 102249， China

    State Key Laboratory of Petroleum Resources and Engineering， Beijing 102249， China

WANG Lei12,  
  • Affiliation：

    College of Geosciences， China University of Petroleum （Beijing）， Beijing 102249， China

    State Key Laboratory of Petroleum Resources and Engineering， Beijing 102249， China

ZHANG Ziyin12,  
  • Affiliation：

    College of Geosciences， China University of Petroleum （Beijing）， Beijing 102249， China

    PetroChina Coalbed Methane Company Limited， Beijing 100028， China

DING Rong13,  
  • Affiliation：

    Research Institute of Petroleum Exploration and Development， PetroChina， Beijing 100083， China

    Unconventional Petroleum Research Institute， China University of Petroleum （Beijing）， Beijing 102249， China

DENG Ze45,  
  • Affiliation：

    Research Institute of Petroleum Exploration and Development， PetroChina， Beijing 100083， China

TIAN Wenguang4,  
  • Affiliation：

    College of Geosciences， China University of Petroleum （Beijing）， Beijing 102249， China

    State Key Laboratory of Petroleum Resources and Engineering， Beijing 102249， China

XIAO Huiyi12

추상적인

오르도스 분지 심부 석탄암 가스 탐사가 중대한 돌파구를 이루었으며, 완전히 새로운 발전 분야를 개척했습니다. 현재 심부 석탄암 가스의 축적 메커니즘과 유리한 탐사 방향에 대한 인식에는 여전히 분분한 의견이 있어, 축적 메커니즘 연구가 더욱 심화되어야 함을 보여줍니다. 오르도스 분지 중동부 석탄기 벤시조 8번 탄층을 연구 대상으로 하여, 지질 분석, 통계 분석 및 석유 가스 동력장 이론을 종합적으로 활용하여 심부 석탄암 가스의 축적 조건과 유리한 구역 분포를 탐구하였습니다. 연구 결과에 따르면, 역반사율(Ro)이 약 1.5%~2.5%인 핵심 진화 단계에서 석탄암 가스의 생성, 저장, 이동 및 보존 조건이 시간 및 공간적으로 중첩되는 뚜렷한 특징을 보이며, 가스 풍부 스위트 스폿 형성과 분포에 주도적인 역할을 합니다. 구체적으로 다음의 네 가지를 나타냅니다: ① 이 단계 석탄암의 가스 생성 속도가 높고 생성 강도가 커서 가스 축적의 물질적 기초를 마련합니다. ② 석탄암 기공률이 비정상적으로 높으며, Ro 약 2.0%일 때 2차 최고점에 도달하고, 미세공 및 거대공 부피가 동기 증가하여 석탄암 가스 축적에 우수한 저장 공간을 제공합니다. ③ 석탄암 절리계가 고도로 발달하여, 절리 밀도가 Ro 약 1.9%일 때 최고점을 이루며 석탄암 가스의 운집 축적을 위한 효율적인 수송 통로를 구축합니다. ④ 석탄암 주변 변성암은 좁은 동력장에 위치하여 가스 풍부 스위트 스폿 형성에 좋은 보존 환경을 조성합니다. 이를 바탕으로 ‘생-저-도-보’ 네 가지 요소를 정량적으로 표지하는 심부 석탄암 가스 유리 구역 종합 평가 모델을 구축하였고, 다중 파라미터 중첩 방법으로 연구 지역 내 유리 구역을 등급별 예측하였습니다. 예측 결과 연구 지역은 Ⅰ류, Ⅱ류 및 Ⅲ류 유리 구역으로 나누었습니다. 시추 결과 Ⅰ류 유리 구역 내 고함기 공(함기량 ≥ 18 m³/t)이 90%를 차지하며 평균 함기량은 24.04 m³/t로 모델 예측과 실제 탐사 결과가 잘 부합함을 보여줍니다. 연구 성과는 오르도스 분지 심부 석탄암 가스 유리 구역 선별 및 추가 탐사 배치를 위한 신뢰할 수 있는 이론적 근거와 기술적 지원을 제공하며, 자원 개발 효율 향상과 국가 에너지 안보 보장에 중요한 의미를 가집니다.

키워드

기공 구조; 완전 석유 가스 시스템; 유리 구역 예측; 석유 가스 축적; 석탄암 가스; 오르도스 분지

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