Acta Petrolei Sinica ›› 2023, Vol. 44 ›› Issue (12): 2231-2249.DOI: 10.7623/syxb202312014

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Unconventional oil-gas accumulation conditions and exploration potentials in Hexi Corridor and its adjacent areas

Wei Haoyuan, Zhu Zongliang, Wei Deqiang, Li Yudong, He Heng, Yang Yinping, Li Henan, Ren Xueyao   

  1. Research Institute of Petorleum Exploration and Development, PetroChina Yumen Oilfield Company, Gansu Jiuquan 735019, China
  • Received:2023-06-20 Revised:2023-10-16 Online:2023-12-25 Published:2024-01-06

河西走廊及其邻区非常规油气成藏条件及勘探潜力

魏浩元, 朱宗良, 韦德强, 李昱东, 何恒, 杨银平, 李赫楠, 任雪瑶   

  1. 中国石油玉门油田公司勘探开发研究院 甘肃酒泉 735019
  • 通讯作者: 魏浩元,男,1984年5月生,2014年获中国石油大学(北京)地质工程专业硕士学位,现为中国石油玉门油田公司勘探开发研究院高级工程师,主要从事油气地质综合研究工作。Email:ymweihy@petrochina.com.cn
  • 作者简介:魏浩元,男,1984年5月生,2014年获中国石油大学(北京)地质工程专业硕士学位,现为中国石油玉门油田公司勘探开发研究院高级工程师,主要从事油气地质综合研究工作。Email:ymweihy@petrochina.com.cn
  • 基金资助:
    中国石油天然气股份有限公司科技专项"中石油'十四五’油气资源评价"(2023YQX20114)资助。

Abstract: The sedimentary basins in Hexi Corridor and its adjacent areas have been explored as the prospecting areas of Yumen oilfield. In the complex process of exploration, seven oil fields, including Laojunmiao, Qingxi, and Jiudong, have been discovered in Jiuquan Basin. However, no substantial breakthroughs have been made in peripheral basins. In recent years, a comprehensive geological evaluation has been performed on the oil-gas resources of sedimentary basins in Hexi Corridor and its adjacent areas. It is judged that the study area has certain exploration potential for unconventional oil and gas, dominated by shale oil and tight sandstone gas. Shale oil resources are mainly distributed in the Qingxi sag and Huahai sag of Jiuquan Basin, as well as Xiaohu subsag and Suotuo subsag of Yabulai Basin. Tight sandstone gas resources are mainly detected in Wuwei Basin, Minle Basin and South Qilian Basin. The total scale of shale oil resources in Qingxi sag are estimated as being over 100 million tons. Currently, the exploratory wells like Liuye 1H have been deployed, marking the beginning of shale oil exploration in Jiuquan Basin. Huahai sag, Xiaohu subsag, and Suotuo subsag all possess geological conditions favorable for shale oil accumulation, and the shale oil geological resources evaluated during the 13th Five-Year Plan period is about 0.6×108t, 1.5×108t and 0.2×108t, respectively. The exploration level of Wuwei Basin, South Qilian Basin, and Minle Basin is relatively low. The comprehensive geological evaluation suggests that these basins have good exploration prospects for tight sandstone gas, and further evaluation of unconventional oil and gas exploration is needed to determine the resource scale and exploration potential.

Key words: Hexi Corridor and its adjacent areas, unconventional oil-gas, shale oil, tight sandstone gas, accumulation conditions, resource potential

摘要: 河西走廊及其邻区沉积盆地作为玉门油田探区,在曲折的勘探实践过程中,在酒泉盆地先后发现了老君庙、青西和酒东等7个油田,但外围盆地均未取得实质性突破。近年来对河西走廊及其邻区沉积盆地开展的全面油气地质评价认为,河西走廊地区非常规油气具有一定勘探潜力,以页岩油和致密砂岩气为主。页岩油资源主要分布在酒泉盆地的青西凹陷和花海凹陷,以及雅布赖盆地的小湖次凹和梭托次凹;致密砂岩气资源主要分布在武威盆地、民乐盆地和南祁连盆地。青西凹陷页岩油总体估算的资源规模在亿吨级以上,目前已部署的风险探井柳页1H井,拉开了酒泉盆地页岩油勘探的序幕;花海凹陷、小湖次凹和梭托次凹均具备形成页岩油的地质条件,其在"十三五"期间评价的页岩油地质资源量分别约为0.6×108t、1.5×108t和0.2×108t;武威盆地、南祁连盆地、民乐盆地的勘探程度较低,地质综合评价认为这些盆地中致密砂岩气发育,具有较好的勘探前景,需进一步开展非常规油气勘探评价,落实资源规模及勘探潜力。

关键词: 河西走廊及其邻区, 非常规油气, 页岩油, 致密砂岩气, 成藏条件, 资源潜力

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