이전|다음

심층 석탄 지질가스 균열망 활성화 무모래 압쇄 이론 기초 및 실천

  • role： First author第一作者
  • Affiliation：

    Changqing Oilfield Company， PetroChina， Xi’an， Shaanxi 710018， China

    National Engineering Lab for Prospecting & Exploration of Low-Permeability Oil-Gas Field， Xi’an， Shaanxi 710018， China

  • Email：zhaosong7198_cq@petrochina.com.cn
  • Introduction：赵松（1971—），男，正高级工程师，天然气开发。E-mail：zhaosong7198_cq@petrochina.com.cn。
ZHAO Song12,  
  • Affiliation：

    Changqing Oilfield Company， PetroChina， Xi’an， Shaanxi 710018， China

    National Engineering Lab for Prospecting & Exploration of Low-Permeability Oil-Gas Field， Xi’an， Shaanxi 710018， China

HOU Yuting12,  
  • role： Corresponding author通信作者
  • Affiliation：

    National Engineering Lab for Prospecting & Exploration of Low-Permeability Oil-Gas Field， Xi’an， Shaanxi 710018， China

    No. 2 Gas Production Plant， Changqing Oilfield Company， PetroChina， Yulin， Shaanxi 719000， China

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

  • Email：fshix_cq@petrochina.com.cn
  • Introduction：费世祥（1984—），男，正高级工程师，天然气开发。E-mail：fshix_cq@petrochina.com.cn。
FEI Shixiang234*,  
  • Affiliation：

    National Engineering Lab for Prospecting & Exploration of Low-Permeability Oil-Gas Field， Xi’an， Shaanxi 710018， China

    Exploration and Development Research Institute， Changqing Oilfield Company， PetroChina， Xi’an， Shaanxi 710018， China

CUI Yuehua25,  
  • Affiliation：

    National Engineering Lab for Prospecting & Exploration of Low-Permeability Oil-Gas Field， Xi’an， Shaanxi 710018， China

    Oil & Gas Technology Research Institute Changqing Oilfield Company， PetroChina， Xi’an， Shaanxi 710018， China

WEN Xiaoyong26,  
  • Affiliation：

    National Engineering Lab for Prospecting & Exploration of Low-Permeability Oil-Gas Field， Xi’an， Shaanxi 710018， China

    Exploration and Development Research Institute， Changqing Oilfield Company， PetroChina， Xi’an， Shaanxi 710018， China

LEI Wenzhi25,  
  • Affiliation：

    Oil and Gas and New Energy Branch， PetroChina， Beijing 100007， China

HU Yunpeng7,  
  • Affiliation：

    National Engineering Lab for Prospecting & Exploration of Low-Permeability Oil-Gas Field， Xi’an， Shaanxi 710018， China

    Exploration and Development Research Institute， Changqing Oilfield Company， PetroChina， Xi’an， Shaanxi 710018， China

PENG Yue25,  
  • Affiliation：

    National Engineering Lab for Prospecting & Exploration of Low-Permeability Oil-Gas Field， Xi’an， Shaanxi 710018， China

    Exploration and Development Research Institute， Changqing Oilfield Company， PetroChina， Xi’an， Shaanxi 710018， China

CHEN Hongfei25

추상적인

오르도스 분지는 풍부한 석탄 지질가스 자원을 보유하고 있으며, 이는 중국 천연가스 공급 능력 향상에 중요한 의미를 갖는다. 석탄 지층의 원위치 조건에서 투과성은 매우 약하며, 현재는 주로 대규모 모래 압쇄를 통해 생산량 돌파를 이루고 있으나 이 방법은 비용이 높고 경제성이 낮다. 연구 대상은 오르도스 분지 동부 석탄기 벤시조 8번 석탄층으로, 저장층 특성 분석, 암석 역학 시험, 수-석탄 반응 실험 및 압쇄 후 유동성 평가 방법을 종합하여 광산 현장 실무와 결합하여 체계적인 연구를 진행하였다. 연구 결과 석탄 내에는 천연 절리들이 발달해 강한 소성을 가지며, 상부 및 하부 고정지지 조건 하에 "응력 봉인 상자"와 유사한 구조를 형성한다. 고압 유체 주입은 석탄에서 인장-전단 복합 파괴와 미끄럼을 유발하여 석탄체 파쇄 및 천연 절리 활성화를 촉진시켜 복잡한 균열망을 형성한다. 파쇄된 석탄은 원위치 조건에서 투과 공간을 크게 확대하여 균열이 파쇄액 배출 후에도 높은 유동성능을 유지할 수 있다. 이러한 인식을 바탕으로 석탄 지질가스 "균열망 활성화 무모래 압쇄" 개념을 제안하여 압쇄 방식이 "안정 액체 모래 제어 — 극한 모래 제어 — 무모래 압쇄"로 전환되었다. 현장 시험 결과 무모래이고 액체량이 유사한 조건에서 무모래 압쇄 단일 공정 생산성은 기존 압쇄와 동등하며, 이는 액체 규모가 생산성에 대한 주된 제어 인자임을 나타낸다; 수평 구간 길이 1,500m, 유입액량 24,500㎥의 무모래 압쇄 조건에서 일일 가스 생산량은 4×10⁴㎥ 이상으로 안정적이다. 무모래 압쇄 기술은 석탄지층 저장층의 지질-공학적 고유 특성을 최대한 활용하여 생산량 안정성을 유지함과 동시에 비용 절감의 장점을 가지고 있어 심층 석탄 지질가스 대규모 개발에 중요한 의의를 가진다.

키워드

광산 시험; 수-석탄 반응; 물리 시뮬레이션; 투과 증가 메커니즘; 응력 봉인 상자; 균열망 활성화 무모래 압쇄; 석탄 지질가스; 오르도스 분지

References

  1. 1.
    ZOU Caineng， ZHAO Qun， LIU Hanlin， et al. China’s breakthrough in coal-rock gas and its significance［J］. Natural Gas Industry， 2025， 45（4）： 1-18.
  2. 2.
    ZHOU Lihong， XIONG Xianyue， DING Rong， et al. Connotation， enrichment mechanism and practical significance of coal-rock gas［J］. Natural Gas Industry， 2025， 45（3）： 1-15.
  3. 3.
    FEI Shixiang， CUI Yuehua， LI Xiaofeng， et al. Main factors controlling the efficient production of horizontal wells for deep coal-rock gas in the eastern and central Ordos Basin［J］. Oil & Gas Geology， 2025， 46（1）： 273-287.
  4. 4.
    FEI Shixiang， HOU Yuting， ZHANG Zhengtao， et al. Differentiated and refine geosteering methods for coal-rock gas horizontal wells and their applications in the eastern Ordos Basin［J］. Natural Gas Geoscience， 2025， 36（6）： 985-999.
  5. 5.
    HOU Yuting， ZHOU Guoxiao， HUANG Daojun， et al. Geological characteristics of coal-rock gas accumulation in the Nalinhe area， Ordos Basin［J］. Oil & Gas Geology， 2024， 45（6）： 1605-1616.
  6. 6.
    LI Yong， XU Fengyin， TANG Shuheng， et al. Progress and development direction of coalbed methane （coal-rock gas） exploration and development in the Ordos Basin［J］. Natural Gas Industry， 2024， 44（10）： 63-79.
  7. 7.
    ZHANG Yanming， LIN Xiaobo， ZHOU Changjing， et al. Key reservoir stimulation technologies and application for deep coal-rock gas in Ordos Basin［J］. China Petroleum Exploration， 2025， 30（4）： 160-170.
  8. 8.
    LI Yong， XU Lifu， ZHANG Shouren， et al. Gas bearing system difference in deep coal seams and corresponded development strategy［J］. Journal of China Coal Society， 2023， 48（2）： 900-917.
  9. 9.
    WEN Xiaoyong， CHEN Lei， YE Liang， et al. Breaking properties and fracture conductivity of new type of gas reservoir rocks in Ordos Basin［J］. Journal of Xi’an Shiyou University （Natural Science Edition）， 2024， 39（2）： 12-21， 46.
  10. 10.
    YANG Hua， LIU Xinshe， YAN Xiaoxiong. The relationship between tectonic-sedimentary evolution and tight sandstone gas reservoir since the Late Paleozoic in Ordos Basin［J］. Earth Science Frontiers， 2015， 22（3）： 174-183.
  11. 11.
    LI Xiaogang， TANG Zheng， ZHU Jingyi， et al. Research progress and prospect of deep coalrock fracturing［J］. Natural Gas Industry， 2024， 44（10）： 126-139.
  12. 12.
    ZHANG Caili， LIU Xinshe， YANG Yajuan， et al. Petroleum exploration history and enlightenment of Changqing Oilfield in Ordos Basin［J］. Xinjiang Petroleum Geology， 2021， 42（3）： 253-263.
  13. 13.
    NIU Xiaobing， ZHAO Weibo， SHI Yunhe， et al. Natural gas accumulation conditions and exploration potential of Benxi Formation in Ordos Basin［J］. Acta Petrolei Sinica， 2023， 44（8）： 1240-1257.
  14. 14.
    XI Shengli， YAN Wei， LIU Xinshe， et al. New fields， new types and resource potentials of natural gas exploration in Ordos Basin［J］. Acta Petrolei Sinica， 2024， 45（1）： 33-51， 132.
  15. 15.
    NIU Xiaobing， FAN Liyong， YAN Xiaoxiong， et al. Enrichment conditions and resource potential of coal-rock gas in Ordos Basin， NW China［J］. Petroleum Exploration and Development， 2024， 51（5）： 972-985.
  16. 16.
    ZHANG Zhengtao， FEI Shixiang， LUO Wenqin， et al. Reservoir evaluation and sweet spot optimization for coal rock gas in Benxi Formation， eastern Ordos Basin［J］. Xinjiang Petroleum Geology， 2025， 46（3）： 263-272.
  17. 17.
    LI Yong， PAN Songqi， NING Shuzheng， et al. Coal measure metallogeny： Metallogenic system and implication for resource and environment［J］. Science China Earth Sciences， 2022， 52（10）： 1948-1965.
  18. 18.
    LI Yong. Coal structure evolution and its fuel， raw material and functional material properties development［J］. Journal of China Coal Society， 2022， 47（11）： 3936-3951.
  19. 19.
    HUANG Yougen， ZHENG Xiaopeng， ZHANG Daofeng， et al. Microscopic characteristics of and gas occurrence in coal rock in Benxi Formation， Ordos Basin［J］. Xinjiang Petroleum Geology， 2025， 46（3）： 253-262.
  20. 20.
    WANG Hongyan， DUAN Yaoyao， LIU Honglin， et al. Preliminarily exploring the theories and technologies for coalbed methane production using horizontal wells： Comparison of conditions for coalbed methane and shale gas exploitation［J］. Coal Geology & Exploration， 2024， 52（4）： 47-59.
  21. 21.
    ZHANG Daofeng， MENG Kang， HUANG Yougen， et al. Characteristics of methane carbon isotopes in desorbed gas from the Carboniferous Benxi coal rock in Ordos Basin and their geological significance［J］. Natural Gas Geoscience， 2025， 36（9）： 1728-1740.
  22. 22.
    HOU Yuting， ZHOU Guoxiao， HUANG Daojun， et al. Geological characteristics of coal-rock gas accumulation in the Nalinhe area， Ordos Basin［J］.Oil & Gas Geology， 2024， 45（6）： 1605-1616.
  23. 23.
    YAN Xia， XIONG Xianyue， XU Fengyin， et al. Deep coal geomechanical influence mechanism and its control factors of Daji Block in Ordos Basin［J］. Journal of China Coal Society， 2025， 50（5）： 2550-2566.
  24. 24.
    XIONG Dong， HE Jiayuan， MA Xinfang， et al. Fracturing simulation with different perforation positions at deep coal seam and roof/floor rock—case study at the No.8 deep coal seam of a gas field in the Ordos Basin［J］. Journal of China Coal Society， 2024， 49（12）： 4897-4914.
  25. 25.
    LIAO Songze， HU Jinghong， ZHANG Yuan. Mechanism of hydraulic fracture vertical propagation in deep shale formation based on elastic-plastic model［J］. Engineering Fracture Mechanics， 2024， 295： 109806.
  26. 26.
    WANG Junting， XU Dongjin， TAO Zhenqiang， et al. Effects of particle size and shape of unconventional oil and gas proppants on breakage rate and fracture conductivity［J］. Science Technology and Engineering， 2025， 25（9）： 3672-3679.
  27. 27.
    YAN Jiwei， LIANG Weiguo， SONG Xiaoxia. Distribution of quartz sand and coal fines in hydraulic fracturing coal seams and its impact on coalbed methane extraction［J］. Journal of China Coal Society， 2026， 51（2）： 1476-1486.
  28. 28.
    LI Mingrui， SHI Yunhe， FAN Liyong， et al. Comparison of main reservoir characteristics between deep coal-rock gas of the No.8 coal seam of the Upper Paleozoic Benxi Formation and tight sand gas reservoirs， Ordos Basin［J］. Oil & Gas Geology， 2024， 45（6）： 1590-1604.
  29. 29.
    WANG Bo， XU Fengyin， ZHANG Aoxiang， et al. Coupling effect of water-rock in the process of coalbed methane extraction and its response to production capacity-Fanzhuang block in Qinshui Basin as an example［J］. Journal of China Coal Society， 2025， 50（8）： 4008-4021.
  30. 30.
    LV Kunhong， ZHANG Hui， WU Baokang， et al. Damage constitutive model and experimental study of deep coal rock under thermal-hydro-mechanical coupling［J］. Scientific Reports， 2025， 15（1）： 29337.
  31. 31.
    WU Baoyang， SONG Jiahui， LI Peng， et al. Damage and mechanical property deterioration of coal rocks under different water flooding［J］. Chinese Journal of Underground Space and Engineering， 2024， 20（S1）： 84-93.
  32. 32.
    HE Jiayuan， ZHANG Shicheng， GUO Xusheng， et al. Experimental study and production of long-term conductivity in deep coal seam propped fractures［J］. Natural Gas Geoscience， 2025， 36（9）： 1753-1766.
  33. 33.
    JI Yinlin， ZHANG Supeng， ZHU Honggu， et al. Mechanisms and control techniques of friction-permeability coupling of rock discontinuities in deep underground engineering： State of the art and future perspectives［J］. Journal of Mining and Strata Control Engineering， 2025， 7（6）： 063541.
  34. 34.
    GE Zhaolong， LI Shihua， ZHOU Zhe， et al. Modeling and experiment on permeability of coal with hydraulic fracturing by stimulated reservoir volume［J］. Rock Mechanics and Rock Engineering， 2019， 52（8）： 2605-2615.

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