DEGASIFICATION METHODS AND APPLICATION OF HIGH QUALITY MARINE SOURCE ROCKS IN SOUTH CHINA
-
摘要: 对南方海相烃源岩进行吸附气和酸解气脱气方法研究,并对其组分进行色谱和同位素分析,该方法组分含量的最大相对偏差小于10%,碳同位素值的最大绝对偏差小于1‰。对南方海相烃源岩的酸解气和吸附气的适用范围进行研究,结果表明:煤系样品不适合进行酸解气分析,吸附气的甲烷碳同位素一般不受有机质含量和碳酸盐含量的影响,酸解气的甲烷碳同位素则受有机质含量和碳酸盐含量的影响。进行气源对比应优先选用酸解气分析。运用该方法对南方海相二叠系烃源岩进行吸附气和酸解气组分碳同位素的演化模式研究,结果表明:随着演化程度的增加,吸附气和酸解气组分碳同位素逐渐变重,在过成熟阶段趋于平缓。Abstract: Degasification methods of adsorbed gas and acid decomposed gas in marine facies source rocks in South China are studied in this paper.GC and isotopes analyses of gas compositions are also done.The maximum relative deviation of composition contents is less than 10%,and the maximum absolute deviation of carbon isotopes is less than 1‰.Applications of the methods are studied.Coal samples are not fit for acid decomposed gas analyses.Methane isotopes of adsorbed gas generally will not be influenced by organic matter or carbonate contents.But for methane isotopes of acid decomposed gas,things are different.Acid decomposed gas is favorable for gas-source correlation.Evolution model studies of carbon isotopes of adsorbed gas and acid decomposed gas from marine facies Permian source rocks in South China are done,indicating that,as evolution degree increases,carbon isotopes of adsorbed gas and acid decomposed gas become heavier until over-mature stage.
-
Key words:
- acid decomposed gas /
- adsorbed gas /
- carbon isotopes /
- application research /
- marine source rocks /
- South China
-
[1] 翟光明.中国石油地质志(卷十二)[M].北京:石油工业出版社,1992.1～21 [2] 马永生,郭旭升,郭彤楼等.四川盆地普光大型气田的发现与勘探启示[J].地质论评,2005,51(4):477～480 [3] 蒋启贵,张志荣,宋晓莹等.轻烃指纹分析及其应用[J].地质科技情报,2005,24(1):61～64 [4] 刘光祥,蒋启贵,潘文蕾等.干气中浓缩轻烃分析及应用:以川东北、川东地区天然气气/源对比为例[J].石油实验地质,2003,25(增刊):585～589 [5] 马力,陈焕疆,甘克文等.中国南方大地构造和海相油气地质[M].北京:地质出版社,2005.265～275 [6] 何志高.应用酸解气态烃评价碳酸盐岩生油岩[J].石油实验地质,1983,5(2):160～164 [7] 胡惕麟,葛保雄,张义刚等.源岩吸附烃和天然气烃类指纹参数的开发和应用[J].石油实验地质,1990,12(4):275～394 [8] 张晓宝,徐永昌,沈平等.我国不同赋存状态烃类气体的研究现状与展望[J].地球科学进展,1997,12(3):230～235 -
计量
- 文章访问数: 802
- HTML全文浏览量: 103
- PDF下载量: 305
- 被引次数: 0
下载:
苏公网安备32021102000780号