未熟油与成熟油的混源实验、混源理论图版及其应用  

The mixture laboratory experiment of immature oils and mature oils, making and using the mixture source theory plat and its application.

作　　者：王文军[1] 宋宁[1] 姜乃煌[2] 宋孚庆[2] 

机构地区：[1]江苏石油勘探局地质科学研究院 [2]中国石油天然气集团公司石油勘探开发科学研究院

出　　处：《石油勘探与开发》1999年第4期34-37,共4页Petroleum Exploration and Development

摘　　要：苏北盆地不同成熟度原油混合的现象比较普遍。选择Ｓ７ 井典型成熟油与Ｔ６ 井典型未熟油，将它们按质量百分比混合进行混源实验，以验证混源对族组分、饱和烃、生物标志化合物等地球化学参数的影响。实验研究结果表明，目前勘探发现的“未熟油”， 其正构烷烃的主要来源仍是干酪根生成的成熟油。计算了成熟度参数Ｃ２９２０Ｓ／（２０Ｓ＋ ２０Ｒ） 、∑ｎＣ１５ ＋ ／∑ααα甾烷Ｃ２７ ～２９２０Ｒ及饱和烃含量之间的关系，并分析了实验数据与理论计算结果的差异。根据油气初次运移及二次运移对地球化学参数影响较小的特点，用排烃条件较差的油源岩自然演化的样品数据代表原始的不同成熟度原油，进行某一特定未熟油与不同成熟度原油的理论混源计算，绘制出理论图版。应用该图版，可计算各油田未熟油与成熟油的比例，还可分析成熟油的最大成熟度、油藏成藏时间、生物降解及油气运移等情况。The phenomena of different maturity crude oils mixing are common in Subei basin. The authors experimented with the typical immature oils (from Well T6) and the typical mature oils (from Well S7) according to the percent of weight, and verified the effect of different source on geochemical data, for example, composition of oils, and the characteristic of saturated hydrocarbon GC and GC MS. The study shows that the main source of the so called immature oils is from mature oils. On the bases of experiment data, the authors calculated theoretically the relation of maturity indicators C 2920S/(20S+20R), ΣnC 15+/Σ ααα steranes C 27 2920R and saturated HC (Sat%), and analyzed the difference of the data from laboratory and from theoretical calculation. According to the small effect of the first and secondary migration on the geochemical data, the natural evolution curve of source rocks in which the efficiency of effluent oils are low, represent the different maturity original crude oils. Using an immaturity crude oil to calculate some different maturity crude oils, the authors drawn out the theory plot then find out the ratio of immaturity crude oil and maturity crude oil in every oil field. It can also make clean that the maximum maturity of oil source, the formation time of oil pools, and the distance of migration.

关 键 词：未熟油 成熟油 混源 图版 实验 油气勘探 

分 类 号：P618.130.8[天文地球—矿床学] P618.130.4[天文地球—地质学]