摘要
泥页岩存在较强的有机非均质性,实测地化数据受到样品数量的限制,难以精确描述油气在泥页岩体系中的分布特征。基于改进的ΔlgR模型评价泥页岩有机质丰度和残留烃含量,参照页岩油资源评价分级标准,可清楚地刻画页岩油富集、低效、无效资源的空间分布。根据热解色谱分析参数校正实验和组分生烃热模拟实验,确定S1的重烃、轻烃补偿系数,采用体积法定量评价不同级别页岩油资源量,指明有利的勘探区块。研究结果表明,改进的ΔlgR模型较好地改善了测井资料评价地化参数的精度,可操作性强。应用结果显示,松辽盆地南部青山口组页岩油资源主要富集在青山口组一段中、下部,区域上分布于扶新隆起、红岗阶地和长岭凹陷北部,富集资源量48.08×108t,约占总资源量的1/3。通过有机非均质性刻画来评价页岩油气资源的分布特征,不仅阐明了页岩油的空间分布特征,而且还节约分析化验的成本,为页岩油下一步勘探开发提供实质性的指导。
It is well known that shale has strong organic heterogeneity. As the amount of measured geochemical data is imited by the available samples,it is hard to describe the spatial distribution of shale oil and gas precisely. Through evaluation of organic abundance and retained hydrocarbon content by using the improved ΔlgR model,the spatial distributions of enriched,low-efficiency and inefficient shale oil resources are well mapped respectively with reference to the shale oil resources grading evaluation standards. The heavy hydrocarbon and light hydrocarbon compensate coefficients for S1 are determined through correcting the experiments and component hydrocarbon generation thermal simulation experiment with pyrolysis chromatography parameters. Volume method is used to quantitatively evaluate different grade shale oil resources,and recognize favorable exploration areas. Research shows that the improved ΔlgR model enhances the accuracy and operability of evaluating geochemistry parameters with logging data. Application results show that the shale oil resources of the Qingshankou Formation in southern Songliao Basin occur in the lower-middle part of its first member. And the play fairways are distributed in Fuxin Uplift,Honggang terrace and northern Changling Sag,where the estimated shale oil resources is 4. 808 billion tons,accounting for a third of the total resources. The method of evaluating distribution of shale oil /gas by describing organic heterogeneity not only can reveal the spatial distribution features of shale oil,but also can save the cost of laboratory test,and more important,it can provide substantial guidance for future exploration and development of shale oil.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2014年第5期704-711,共8页
Oil & Gas Geology
基金
国家自然科学基金项目(40972101)
中央高校基本科研业务费专项(27R1421002A)
关键词
非均质性
页岩油气
资源评价
青山口组
松辽盆地
heterogeneity
shale oil and gas
resource evaluation
Qingshankou Formation
Songliao Basin
