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柴达木盆地石油地质条件、资源潜力及勘探方向

作    者:陈 琰,雷 涛,张国卿,袁 莉,王 铎,吴志雄,陈景华,杨乾霞
单    位:中国石油青海油田分公司
基金项目:受中国石油集团重大专项之课题“柴达木盆地第四次油气资源评价”资助
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29.59×108 t,致密油资源量为8.58×108 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。
关键词:地质条件;成藏模式;资源潜力;勘探方向;石油;柴达木盆地

The geological conditions, resource potential and exploration direction of oil in Qaidam Basin

Author's Name: WU Zhixiong, CHEN Jinghua, YANG Qianxia
Institution: Qinghai Oilfield Branch of PetroChina
Abstract:
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 are 29.59×108 t and 8.58×108 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 Shizigou-Dawusi 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.
Keywords: geological conditions; accumulation patterns; resource potential; exploration direction; oil; Qaidam Basin
投稿时间:2019-03-28  
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