金刚烷类在煤岩热演化过程中形成与转化

项目名称： 金刚烷类在煤岩热演化过程中形成与转化

项目编号： No.41502133

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 天文学、地球科学

项目作者： 宋换新

作者单位： 长江大学

项目金额： 18万元

中文摘要： 对金刚烷类在地质体中的形成机理与演化规律等基础性问题认识不足，是制约其在油气勘探领域应用成效的关键因素。前人的研究存在一个普遍问题是没有结合实际地质演化剖面（或具可对比性的连续样品系列）来研究金刚烷类的热演化规律。申请者在前期研究中，对南祁连木里坳陷中侏罗统窑街组煤岩进行了系统的地化特征研究，发现在坳陷不同构造部位煤矿中采集的大量煤岩样品在形成环境、有机质及黏土矿物组成等方面具有高度的相似性，而在热演化程度上具有连续性（RO为0.48%～2.06%）。对这一样品系列初步研究表明，随热演化程度的增加，低级金刚烷类具有从无到有、含量从低到高的演化特征。采用实际样品系列与热模拟样品系列对比、分布特征与绝对浓度相结合的研究方法，对低级金刚烷类在地质体中的形成过程与演化特征进行研究，阐明其变化规律与演化机理。研究成果对于深入认识金刚烷类成因及形成机理、推动其在油气勘探众多领域的应用都有重要意义。

中文关键词： 金刚烷；煤岩；热演化；形成机理；转化规律

英文摘要： The limited understanding of some basic problems such as diamondoids’ forming mechanisms and evolution rules in formation is the key problem to restrict its application in petroleum exploration. A common problem in the previous research is that the researchers have not integrated with practice geological evolution profiles (or continuously collect the samples that can use in stratigraphic correlation )to study the thermal evolution regularity of diamondoids. The geochemical characteristics and hydrocarbon potential of the coals from J1-2y in Muli area of Qilian mountain have been researched in applicant’s previous study. It is found that a great deal of coals from different mines in different tectonic belts in that depression have high similarity in formation environment, organic matter and clay minerals composition. And the samples have been discovered to be continuous in thermal evolution (with Ro ranged in 0.48%～2.06%)..The initial research results indicated that the content of low-level diamondoids increased with thermal evolution. A method of actual geological samples compared with the thermal simulation samples, and distribution characteristics combined with absolute concentration will be adopted to study the forming process and evolution feature, so that the thermal evolution rules of the low-level diamondoids will been delineated and the evolution mechanism will been discussed. The research results will provide importance in deeply understanding the forming mechanisms and the application in many different ways in petroleum exploration.

英文关键词： diamondoids;coal rock;thermal evolution;formation mechanisem;transformation rule