二连盆地氧化——还原程度和沉积速率对有机质保存的影响  

The Impact on Organic Matter Preservation by the Degree of Oxidation and Reduction and Sedimentation Rates of Erlian Basin

作　　者：丁修建[1,2] 柳广弟[1,2] 卢学军 黄志龙[1,2] 孙明亮[1,2] 陈哲龙 柳庄小雪 

机构地区：[1]中国石油大学地球科学学院,北京102249 [2]油气资源与探测国家重点实验室,北京102249 [3]中国石油华北油田分公司勘探开发研究院,河北任丘062552

出　　处：《天然气地球科学》2014年第6期810-817,共8页Natural Gas Geoscience

基　　金：国家自然科学基金项目(编号:41102086)资助

摘　　要：沉积环境的氧化—还原程度和沉积速率是影响有机质保存的重要因素。以中国北部的二连盆地为研究对象探讨了氧化—还原程度和沉积速率对有机质保存的影响,发现二者均明显影响着有机质的保存:还原性越强越有利于有机质保存,沉积速率越大越有利于有机质的保存。综合分析发现有机质的保存并非受单一因素控制,氧化—还原程度偏氧化的凹陷中如果沉积速率较高,有机质快速埋藏可以缩短有机质的降解时间,从而使有机质也能得到较好的保存;沉积速率低的凹陷中如果氧化—还原程度偏还原,有机质也能得到较好的保存。有机质保存受氧化—还原程度和沉积速率的综合影响,它们在有机质的保存中起到"相互补充"的作用,单一通过氧化—还原程度或沉积速率分析有机质的保存程度是片面的。The degree of oxidation and reduction of sedimentary environment and sedimentation rates are two vital factors impacting the preservation of organic matter. The author has attempted to study their impaction by instance of Erlian Basin in northern China and found that the strong reducing environment and high sedimentation rates are favorable for the preservation of organic matter. By comprehensive analysis, the author found that the preservation of organic matter is not controlled by a single factor,for example in some sags with their sedimentary environments proximal to oxidation, if the sedimentation rates were higher,the rapid burial of organic matter could shorten the time of degradation;in other sags with lower sedi- mentation rates, if their sedimentation environment was reducing, organic matter can also be well preserved. In summary, the preservation of organic matter is affected synthetically by the degree of oxidation and reduction and sedimentation rates. They play a role of ＂mutual complementation＂ during the preservation of organic matter. Previous research on the preservation of organic matter only analyzed single factor such as the degree of oxidation and reduction or sedimentation rates, which is somewhat partial.

关 键 词：氧化-还原程度 沉积速率 有机质保存 二连盆地 

分 类 号：TE121.1[石油与天然气工程—油气勘探]