摘要
基于煤系全油气系统理论新认识,针对鄂尔多斯、四川和准噶尔等盆地广泛发育的海陆过渡相及陆相煤岩,利用大量煤岩气及其他油气井资料进行关键参数论证,开展全国陆上煤岩气资源评价。取得以下主要成果和认识:①构建了一套适用于各类地质条件和不同资料丰富程度的煤岩气资源评价方法体系。②明确了深层煤岩气资源评价的起评界限:按照盆地地质条件差异将煤岩气临界深度上限分别定为1500,2000,2500 m,煤岩储层厚度下限定为1 m,中低煤阶和中高煤阶煤岩气的含气量下限分别定为2,10 m^(3)/t。③基于煤岩气实验测试、测井资料等基础数据,建立了煤岩含气量、孔隙度和技术可采系数等关键参数的取值方法。④资源评价结果表明,中国陆上14个主要含煤盆地煤岩气地质资源量为55.11×10^(12)m^(3),其中埋深1500~3000,3000~5000,5000~6000 m的资源量分别占总资源量的50.29%,43.11%,6.60%;煤岩气资源分类评价结果显示,Ⅰ类资源占比21.80%,Ⅱ类资源占比32.76%,Ⅲ类资源占比45.44%;Ⅰ+Ⅱ类技术可采资源量约13.23×10^(12)m^(3)。⑤鄂尔多斯盆地是中国煤岩气勘探开发的主战场,四川、准噶尔和塔里木等盆地是勘探开发的重要领域,渤海湾、柴达木、吐哈、松辽和海拉尔等盆地可作为远景区。预计未来10~15年内具备年产500×108 m^(3)的开发潜力,煤岩气有望成为中国天然气上产主要领域和保障国家天然气供应安全的重要接替资源,为建设能源强国贡献非常规力量。
Based on new understandings of the whole petroleum system theory for coal measures,and utilizing data from coal-rock gas wells and other oil and gas wells in numerous pilot test areas for key parameter validation,this study conducted a national resource assessment of coal-rock gas widely developed in marine–continental transitional and continental strata in major petroliferous basins like Ordos,Sichuan and Junggar in China.The main achievements and understandings were obtained as follows.(1)A resource evaluation methodology for coal-rock gas was established,incorporating varying geological/data conditions.(2)Key parameter thresholds for deep coal-rock gas resource evaluation were defined,including the upper limits of burial depth(1500,2000,2500 m),lower limit of reservoir thickness(1 m),and lower limits of gas content in medium-low rank and medium-high rank coals(2,10 m^(3)/t),depending on varying geological conditions across basins.(3)Methods for determining key parameters such as gas content,porosity,and technical recovery factor were developed using the basic data from coal-rock gas experiments/tests and logging.(4)Evaluation results indicate that the geological resources of coal-rock gas in the 14 major basins of onshore China amount to 55.11×10^(12)m^(3).Resources at depths of 1500–3000,3000–5000,5000–6000 m account for 50.29%,43.11%,6.59%of the total,respectively.Resource classification shows that ClassⅠ,Ⅱ,andⅢresources constitute 21.79%,32.76%,45.44%,with the estimated ClassⅠandⅡrecoverable resources of approximately 13.23×10^(12)m^(3).(5)The Ordos Basin remains the most favorable province,while the Sichuan,Junggar and Tarim basins are the promising targets,for future exploration and development of coal-rock gas in the country.Other basins including Bohai Bay,Qaidam,Tuha,Songliao and Hailar are considered as prospective options.Coal-rock gas production is expected to reach 500×10^(8)m^(3)annually within the next 10–15 years,positioning it as a major contributor to the natural gas production growth of China and a crucial alternative resource for ensuring the national gas supply.
作者
李国欣
张君峰
赵群
陈浩
陈艳鹏
张国生
田文广
王玫珠
邓泽
徐旺林
LI Guoxin;ZHANG Junfeng;ZHAO Qun;CHEN Hao;CHEN Yanpeng;ZHANG Guosheng;TIAN Wenguang;WANG Meizhu;DENG Ze;XU Wanglin(PetroChina Company Limited,Beijing 100007,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;PetroChina Oil,Gas&New Energies Company,Beijing 100007,China;CNPC Key Laboratory of Coal-rock Gas,Langfang 065007,China;CNPC Key Laboratory of Gas Reservoir Formation and Development,Beijing 100083,China)
出处
《石油勘探与开发》
北大核心
2025年第6期1231-1245,共15页
Petroleum Exploration and Development
基金
新型油气勘探开发国家科技重大专项“深层煤岩气成藏机理与效益开发技术”(2025ZD1404200)
中国石油天然气股份有限公司前瞻性基础性项目(2024DJ23)
中国石油勘探开发研究院科学研究与技术开发项目(2024vzz)。
关键词
煤岩气
深层煤岩气
原生型煤岩气
再生型煤岩气
资源评价方法
地质资源量
技术可采资源量
资源分类评价
前景展望
coal-rock gas
deep coal-rock gas
primary coal-rock gas
secondary coal-rock gas
resource evaluation method
geological resources
technically recoverable resources
resource classification and evaluation
prospect
