摘要
冀中坳陷饶阳凹陷马西洼槽存在两套主力烃源岩,一套为由沙一下亚段油页岩、鲕灰岩、泥质白云岩和暗色泥岩组成的浅湖-较深湖相烃源岩,另一套为沙三段暗色泥岩淡水湖相烃源岩,它们共同为沙二段、沙一段圈闭提供油源。由于这两套烃源岩的生油母质及成熟度不同,所形成的油层在气测录井资料上响应特征差别很大,以传统的按层位总结油气显示特征的方法效果并不理想,尤其是沙二段。鉴于这两套烃源岩在岩石热解气相色谱资料上很好区分,笔者尝试采用岩石热解气相色谱资料中的植烷峰的高低快速识别油源,针对不同的油源分别建立油层评价标准,在此基础上,分别建立了沙一段、沙二段储集层皮克斯勒和轻重烃比值解释评价图板。实例分析表明其应用效果良好。
There are two sets of main hydrocarbon source rocks in Maxi subsag,Raoyang sag,Jizhong depression.One is shallow lake-deeper lake phase source rock which is composed of oil shale,oolitic limestone,argillaceous dolomite and dark mudstone in Es1 lower sub-member,and the other is Es3 dark mudstone freshwater lacustrine source rock,both of them provide oil source for Es2 and Es1 traps.As the organic matter and maturity of the two sets of source rocks are different,response characteristics of the formed reservoirs are different in gas logging data.The traditional mehtod was not good,especially for Es2 formation,which summarized oil-gas showing features according to the horizon.As these two sets of hydrocarbon source rocks are easy to distinguish from the rock pyrolysis gas chromatography data,the authors tried to use phytane peak in rock pyrolysis gas chromatography data to identify oil source quickly.The reservoir evaluation criteria were set up for different oil sources and on this basis,the interpretation and evaluation charts of Pixler and the ratio of light hydrocarbon to heavy hydrocarbon were established respectively for Es1 and Es2 reservoirs.The practice showed the good results.
出处
《录井工程》
2013年第2期49-53,92,共5页
Mud Logging Engineering
