澳大利亚Bowen盆地与Surat盆地煤层特征及应用

Coal seam characteristics and application of Bowen basin and Surat basin in Australia

Bowen盆地二叠系Bandanna组煤层固定碳含量为45%~60%,Surat盆地侏罗系Walloon亚群煤层固定碳含量为20%~40%,Bowen盆地煤层煤化程度高于Surat盆地煤层。显微组分实验显示Bowen盆地煤层镜质组含量为30%~90%,壳质组含量小于5%,Surat盆地煤层镜质组含量大于70%,壳质组含量10%~20%,Surat盆地煤层生烃潜力大于Bowen盆地。Bowen盆地煤层镜质体反射率值位于0.73%~0.96%之间,为Ⅱ型与Ⅲ型中煤级烟煤,适合做燃料,同时也可用作炼焦原料。Surat盆地煤层镜质体反射率值位于0.4%~0.65%之间,为低煤级煤和Ⅰ型中煤级褐煤,褐煤热解后可以制作半焦和煤焦油,可进行煤层气开发。通过分析Bowen盆地及Surat盆地煤层特点,认为澳大利亚煤质优良,投资环境良好,中国的石油、煤炭、电力、基础设施建设企业可以组建联合公司前往澳大利亚投资,并提前做好充分的尽职调查以及应对方案,以降低投资风险。

Fixed carbon content of the Permian Bandanna formation coal seam in Bowen basin is mainly about 45%~60%, while Walloon subgroup coal seam in Surat basin is mainly in the range of 20%~40%, which indicates that coalification of Bowen basin is higher than that of Surat basin.Microscopic component experiment showed that vitrinite content of Bowen basin was in the range of 30%~90%, exinite content was less than 5%.Most of vitrinite content of Surat basin was more than 70%, exinite was10%~20%, which indicated that the hydrocarbon generating potential of Surat was higher than Bowen basin.Vitrinite reflectance of Bowen basin was around 0.73%~0.96% belonging to type Ⅱand Ⅲ medium rank Bituminous coal, which was suitable for fuel and used as coking raw material.Vitrinite reflectance of Surat basin was about 0.4%~0.65% belonging to low rank and type Ⅰ medium rank lignite.The pyrolysis of lignite could produce semi-coke and coal tar, and the coal seam of Surat could also be used for coal-bed methane development.According to analyzing coal seam characteristics of Bowen basin and Surat basin, the author believed Australia had excellent coal quality and investment environment, and Chinese enterprises of oil, coal, electricity and infrastructure construction could establish joint company to invest in Australia, and conduct adequate due diligence and response plans in advance to reduce investment risks.