收稿日期: 2013-11-25
修回日期: 2014-05-04
网络出版日期: 2014-09-10
基金资助
国家科技重大专项“大型油气田及煤层气开发”(编号:2011ZX05007);中国石油重大科技专项“柴达木盆地建设千万吨油气田综合配套技术研究”(编号:2011E-03)联合资助.
Formation Conditions of Tight Oil and Gas and Its Exploration Fields in the Western Qaidam Basin
Received date: 2013-11-25
Revised date: 2014-05-04
Online published: 2014-09-10
在明确致密油气定义的基础上,分析了柴达木盆地西部(简称“柴西”)地区致密油气形成的地质条件:首先发育多套大面积的烃源岩,具有多个生烃凹陷;其次广泛发育致密储层,主要包括致密砂岩储层和裂缝型(泥质岩和碳酸盐岩)致密储层。致密砂岩储层以南翼山和红柳泉E13砂岩、乌南N12砂岩为代表;裂缝型致密储层以南翼山E23、狮子沟E13、开特米里克和油泉子N1的储层为代表;且源储交互叠置分布。致密油气在柴西地区广泛分布,古构造斜坡区和生油凹陷中心是致密油气分布集中区。致密油气可能的成藏组合包括源内包裹组合、源上广覆组合、源下依伏组合和源侧披覆组合等4种。按照储层成因类型,柴西地区致密油气勘探领域主要有:三角洲前缘砂体致密油气、滩坝和浊积扇砂体致密油气以及碳酸盐岩致密油气3个领域。针对每个领域,通过致密油气形成条件分析,按照区域和层位,共优选出8个有利勘探区带。
郭泽清,孙平,张春燕,田继先,曾旭 . 柴达木盆地西部地区致密油气形成条件和勘探领域探讨[J]. 天然气地球科学, 2014 , 25(9) : 1366 -1377 . DOI: 10.11764/j.issn.1672-1926.2014.09.1366
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