柴达木盆地石油地质条件、资源潜力及勘探方向
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摘要
通过对柴达木盆地石油地质条件的分析,总结建立了富烃凹陷古构造成藏、源外古隆起-古斜坡成藏、源上晚期构造成藏以及富烃凹陷周缘斜坡致密油-岩性成藏等4类石油成藏模式,优选类比法和成因法客观评价了盆地不同区带、不同区块、不同层系的常规油及致密油资源,得出常规油地质资源量为29.59×10~8 t,致密油资源量为8.58×10~8 t。结合盆地石油勘探现状,理清了剩余常规石油地质资源及其分布,明确柴西地区为剩余常规石油地质资源最丰富、资源丰度最大的地区。指出盆缘古隆起及斜坡区、盆内凹陷-斜坡区、盆内大型晚期构造带是近期重点勘探领域:狮子沟—大乌斯构造带、油泉子—开特米里克构造带、阿尔金山前西段是常规石油有利勘探目标,柴西南区的跃东—扎哈泉—乌南和红柳泉—跃进一带,以及柴西北区的小梁山—南翼山等地区是致密油勘探现实有利区。
Based on the analysis of petroleum geological conditions of Qaidam Basin, four patterns of oil accumulation in paleouplift around hydrocarbon-rich sag, in paleouplift-paleoslope outside source rocks, in late structure above source rocks and in tight reservoir or lithologic traps are setup. The analogy method and genesis method are used to objectively evaluate the oil resource of different zones, blocks and strata.The results show that the amounts of the conventional oil and tight oil resource are29.59×10~8 t and 8.58×10~8 t respectively. Combining with the current situation of petroleum exploration in the basin, the remaining conventional oil resources and their distribution are clarified. The areas with the most abundant remaining oil resources are located in the western Qaidam Basin. It is pointed out that paleo-uplift of basin margin and slope area, sag-slope zone in basin and large-scale late structural zone in basin are the key exploration fields in the near future. It is also suggested that ShizigouDawusi structural zone, Youquanzi-Katmerik structural zone and western segment in front of Altun Mountain are favorable targets for conventional oil exploration, and Yuedong-Zahaquan-Wunan zone, Hongliuquan-Yuejin zone in southwestern Qaidam Basin and Xiaoliangshan-Nanyishan in northwestern Qaidam Basin are favorable targets for tight oil exploration.
Based on the analysis of petroleum geological conditions of Qaidam Basin, four patterns of oil accumulation in paleouplift around hydrocarbon-rich sag, in paleouplift-paleoslope outside source rocks, in late structure above source rocks and in tight reservoir or lithologic traps are setup. The analogy method and genesis method are used to objectively evaluate the oil resource of different zones, blocks and strata.The results show that the amounts of the conventional oil and tight oil resource are29.59×10~8 t and 8.58×10~8 t respectively. Combining with the current situation of petroleum exploration in the basin, the remaining conventional oil resources and their distribution are clarified. The areas with the most abundant remaining oil resources are located in the western Qaidam Basin. It is pointed out that paleo-uplift of basin margin and slope area, sag-slope zone in basin and large-scale late structural zone in basin are the key exploration fields in the near future. It is also suggested that ShizigouDawusi structural zone, Youquanzi-Katmerik structural zone and western segment in front of Altun Mountain are favorable targets for conventional oil exploration, and Yuedong-Zahaquan-Wunan zone, Hongliuquan-Yuejin zone in southwestern Qaidam Basin and Xiaoliangshan-Nanyishan in northwestern Qaidam Basin are favorable targets for tight oil exploration.
引文
[1]付锁堂,马达德,陈琰,等.柴达木盆地油气勘探新进展[J].石油学报,2016,37(增刊1):1-10.
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[7]纪友亮,马达德,薛建勤,等.柴达木盆地西部新生界陆相湖盆碳酸盐岩沉积环境与沉积模式[J].古地理学报,2017,19(5):757-772.
[8]孙秀建,杨巍,白亚东,等.柴达木盆地基岩油气藏特征与有利区带研究[J].特种油气藏,2018,25(6):49-54.
[9]李建明,史玲玲,汪立群,等.柴西南地区昆北断阶带基岩油藏储层特征分析[J].岩性油气藏,2011,23(2):20-24.
[10]付锁堂,马达德,郭召杰,等.柴达木走滑叠合盆地及其控油气作用[J].石油勘探与开发,2015,42(6):712-722.
[11]付锁堂.柴达木盆地西部油气成藏主控因素与有利勘探方向[J].沉积学报,2010,28(2):373-379.
[12]李元奎,奎万仓,铁成文,等.柴达木盆地英东地区地质综合评价及勘探目标优选[J].地球学报,2012,33(1):57-64.
[13]郭秋麟,谢红兵,黄旭南,等.油气资源评价方法体系与应用[M].北京:石油工业出版社,2016.
[14]郭秋麟,陈宁生,刘成林,等.油气资源评价方法研究进展与新一代评价软件系统[J].石油学报,2015,36(10):1305-1314.
[15]吴晓智,王社教,郑民,等.常规与非常规油气资源评价技术规范体系建立及意义[J].天然气地球科学,2016,27(9):1640-1650.
[2]付锁堂,袁剑英,汪立群,等.柴达木盆地油气地质成藏条件研究[M].北京:科学出版社,2014.
[3]郭召杰,付锁堂,程丰,等.走滑叠合盆地构造及其控油气作用:柴达木盆地研究新进展[C]//中国地球科学联合学术年会:专题53:环青藏高原盆地体系构造过程与油气聚集论文集, 2014:2368-2369.
[4]袁剑英,付锁堂,曹正林,等.柴达木盆地高原复合油气系统多源生烃和复式成藏[J].岩性油气藏,2011,23(3):7-14.
[5]王明儒.柴达木盆地中新生代三大含油气系统及勘探焦点[J].西安石油学院学报(自然科学版),2001,16(6):8-12.
[6]陈迎宾,胡烨,王彦青.柴达木盆地德令哈坳陷石炭系烃源岩评价[J].特种油气藏,2014,21(5):43-47.
[7]纪友亮,马达德,薛建勤,等.柴达木盆地西部新生界陆相湖盆碳酸盐岩沉积环境与沉积模式[J].古地理学报,2017,19(5):757-772.
[8]孙秀建,杨巍,白亚东,等.柴达木盆地基岩油气藏特征与有利区带研究[J].特种油气藏,2018,25(6):49-54.
[9]李建明,史玲玲,汪立群,等.柴西南地区昆北断阶带基岩油藏储层特征分析[J].岩性油气藏,2011,23(2):20-24.
[10]付锁堂,马达德,郭召杰,等.柴达木走滑叠合盆地及其控油气作用[J].石油勘探与开发,2015,42(6):712-722.
[11]付锁堂.柴达木盆地西部油气成藏主控因素与有利勘探方向[J].沉积学报,2010,28(2):373-379.
[12]李元奎,奎万仓,铁成文,等.柴达木盆地英东地区地质综合评价及勘探目标优选[J].地球学报,2012,33(1):57-64.
[13]郭秋麟,谢红兵,黄旭南,等.油气资源评价方法体系与应用[M].北京:石油工业出版社,2016.
[14]郭秋麟,陈宁生,刘成林,等.油气资源评价方法研究进展与新一代评价软件系统[J].石油学报,2015,36(10):1305-1314.
[15]吴晓智,王社教,郑民,等.常规与非常规油气资源评价技术规范体系建立及意义[J].天然气地球科学,2016,27(9):1640-1650.