海外陆相页岩油地质特征与资源潜力

中国陆相页岩油资源丰富,历经十余年的基础研究、重点地区攻关和选区评价,在技术创新、工业化试验与试生产、规模性开发等方面均取得了显著进展,是未来油气勘探的接替领域。通过对全球典型陆相页岩油地质特征、资源潜力、开发现状进行系统调研和分析,为我国陆相页岩油地质评价和勘探开发部署提供参考。结果表明:(1)美国尤因塔盆地Uteland Butte段的有机质丰度高且具有超压的脆性钙质层和多孔白云岩层为有利区。(2)除美国外,全球101个页岩油盆地152个页岩油层系中,陆相页岩油层系为24个,陆相页岩油资源量占比约为19%。(3)阿根廷6个在产富油气盆地发育6套陆相页岩油层系,其陆相页岩油勘探开发受限于低有机碳含量和烃源岩厚度。(4)澳大利亚库珀盆地REM组以埋藏深度(小于2 000 m)、镜质体反射率(R_o为0.7%～1.0%)以及储层厚度(大于15 m)为标准确定3个页岩油有利区,预测技术可采资源量为2.4亿t。(5)乍得邦戈尔盆地Prosopis组、Mimosa组和Kubla组页岩TOC含量高、热成熟度适中(R_o为0.7%～1.2%)和浅埋深(500...

Geological characteristics and resource potential of overseas terrestrial shale oil

China is rich in terrestrial shale oil resources. After more than a decade of exploration of terrestrial shale oil focusing on basic research,key areas and selection evaluation,remarkable progress has been made in technological innovation,industrial test and pilot production,large-scale development,making it a key area for future oil and gas exploration. The systematic analysis was carried out about the geological characteristics,resource potential and development status of typical terrestrial shale oil all over the world,which can provide a reference for the geological evaluation and exploration and development of terrestrial shale oil in China. The results show that:(1) It is a superiority of high organic matter abundance,overpressure,and fragile calcareous layers and porous dolomite of the Uteland Butte member,Uinta Basin,USA,providing favorable conditions for horizontal well drilling.(2) Except for the USA,of the 152 shale oil formations in 101 basins worldwide,24 are terrestrial shale oil formations,accounting for about 19% of the total terrestrial shale oil resources.(3) There are six terrestrial source rock units are developed in six petroliferous basins in Argentina where the exploration and development of terrestrial shale oil is limited by low TOC content and source rock thickness.(4) REM Formation in Cooper Basin was estimated for about 2.4×10⁸ t of technically recoverable resource according to burial depth(less than 2 000 m),vitrinite reflectance(R_o=0.7%-1.0%) and reservoir thickness(greater than 15 m).(5) The Prosopis, Mimosa and Kubla Formation in the Bongor Basin of Chad are the target formations for shale oil development, estimated a technically recoverable resource of 3.42×10⁸ t,with the characteristics of high TOC content,moderate thermal maturity(R_o=0.7%-1.2%) and shallow depth(500-3 000 m).(6) The technically recoverable resources of shale oil of Early Cretaceous in Doseo Basin are 9.77×10⁸ t.(7) The counterpart of the Brown Shale Formation and Talang Akar Formation in Sumatra Basin are 3.8×10⁸ t and 5.61×10⁸ t,respectively.(8) The terrestrial shale oil resources in Western and Northern Europe are mainly found in the Permian-Carboniferous Formation in Paris Basin,France,and the Wealden Formation in Lower Saxony Basin,Germany,and the technically recoverable shale oil resources are 4.36×10⁸ t and 0.18×10⁸ t respectively based on organic matter maturity and burial depth. The study can provide a reference for terrestrial shale oil exploration in China.