摘要
利用低温样品前处理技术并与地质分析相结合,建立了应用氯仿沥青"A"和热解参数定量评价页岩中滞留烃的方法。通过自生自储油气藏中原油与烃源岩氯仿抽提物组分对比,建立了东营凹陷主要生油窗范围内氯仿沥青"A"轻烃恢复系数随烃源岩生烃演化而变化的关系曲线,Ro小于0.5%,氯仿沥青"A"恢复系数较小,其重要增加发生在Ro为0.7%以后,Ro在1.2%时达到1.40以上。通过新鲜冷冻样品与常温保存样品的对比,建立了热解过程中散失轻烃的确定方法,并建立了不同演化阶段的散失系数,其变化规律与氯仿沥青"A"恢复系数相似。通过原样及抽提残渣的热解对比分析,建立了不同演化阶段烃源岩热解S2中滞留烃的比例系数,在成熟阶段(Ro为0.8%),这一比例可高达50%以上。通过上述技术方法,可以客观评价页岩中滞留烃含量,对油气资源评价具有重要意义。
Based on low-temperature samples pre-treatment technology in combination with geological analysis,the quantitative evaluation method for residual hydrocarbons in shale was built using chloroform bitumen＂A＂and pyrolysis parameters.Through comparison of components in the crude oil of self-generating and self-preserving reservoir and chloroform extract from source rock,this paper presents the curve of relationship between light hydrocarbon of chloroform bitumen＂A＂and source rock hydrocarbons in the main oil generation window of Dongying sag：the recovery coefficient of the former varies with evolution of the latter.The recovery coefficient is small when Rois less than 0.5%,and increase significantly when Rois greater than 0.7%;the value will be greater than 1.4 when Rois 1.2%.Through comparison between the fresh frozen and normal temperature preserved samples,a method for measuring the lost light hydrocarbons during pyrolysis process and the losing coefficient in different evolutionary stages were established in this study.The losing coefficient changes in a similar way as the recovery coefficient of chloroform bitumen＂A＂.Moreover,residual hydrocarbon ratios of the pyrolysis hydrocarbon S2 in different evolution stages of source rock are obtained by contrastive pyrolytic analysis of the original samples and extraction residues.In the mature stage（Rois 0.8%）,the ratio is above 50%.Based on above methods,an objective evaluation can be made on the content of residual hydrocarbons in shale,which is of great significance for oil and gas evaluation.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2015年第1期13-18,共6页
Acta Petrolei Sinica
基金
国家自然科学基金项目(No.41072096
No.41372129)
国家重点基础研究发展计划(973)项目(2014CB239105)
国家重大科技专项(2011ZX05006-001)
中国石油化工股份有限公司科技攻关项目(P14068
P11066)资助
关键词
页岩
滞留油
氯仿抽提
热解参数
轻烃散失
shale
residual oil
chloroform extraction
Rock-Eval parameters
light hydrocarbons loss
