摘要
页岩油作为一种重要的非常规资源类型,拓展了油气勘探开发的新领域。中国东部断陷盆地古近系湖相泥页岩分布范围广、有机质丰度高、厚度大、埋藏较浅、普遍处于生油高峰阶段,具有巨大的页岩油资源潜力。在与北美典型页岩油产区对比的基础上,对中国东部断陷盆地古近系页岩油地质条件进行综合分析,根据富有机质泥页岩的沉积相带、岩石组合、储集空间类型、烃源条件等特征,将页岩油藏划分为深凹区纯泥页岩型、盐间型(盐间高压泥页岩裂缝型、盐间泥页岩夹薄砂岩裂缝型、盐间泥质云岩裂缝型)和泥页岩夹脆性层型(泥页岩夹薄砂岩型、泥页岩夹灰岩型、云质泥岩夹白云岩型)3大类页岩油藏类型,并对其分布特征进行了探讨。在此基础上,对东部断陷盆地古近系页岩油的勘探潜力进行了初步分析,并预测了页岩油有利区。
Shale oil is one of the important unconventional petroleum resources, and its exploration and development has greatly expanded the traditional domain of the industry. The lacustrine shale in the faulted basins of East China has been considered as having great potential for shale oil based on the facts that it has large coverage, high organic matter content, and considerable thickness matched well with shallow buried depth, and that most of it is still within the oil-generating peak stage. Based on comparison with the typical shale oil producing plays in the US, the paper analyzes geological condi- tions of shale oil in these basins in accordance with their sedimentary facies belt, lithology combination, reservoir space types, hydrocarbon source condition of the organic-rich mudstone and shale. Based on the results, the paper explores char- acteristics of these reservoirs and classifies three main types of shale oil reservoirs, i. e. pure shale reservoir in deep de- pression, shale reservoirs within salt layers, and shale reservoirs with thin brittle interbed such as thin sandstone, lime- stone and dolomite. A preliminary analysis of the exploration potential for shale oil in these basins is also carried out and favorable zones for its exploration are identified.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2013年第4期455-462,共8页
Oil & Gas Geology
基金
国家科技重大专项(2009QYXQ15-07)
国家自然科学基金项目(41202103)
关键词
成藏条件
分布特征
页岩油藏类型
有利区带
页岩油
东部断陷盆地
accumulation condition
distribution characteristics
shale oil reservoir type
favorable zone
shale oil
faultedbasins in East China
