排序方式： 共有38条查询结果，搜索用时 500 毫秒
1.
本文对南海深海和冲绳海槽二个柱状样进行了正构烷烃、甾烷和萜烷生物标记化合物分布特征的研究。由于它们所处的沉积环境和生源母质上的差异,反映在正构烷烃的CPI值、C_(17)和C_(18)的含量、轻重烃比值、化合物构型的转化、有机质的成熟度和17α(H)-22,29,30-三降藿烷与18α(H)-22,29,30-三降新藿烷的比值等地球化学参数上的差别。冲绳海槽沉积物的多源性决定了其有机组分的特殊性,如生物来源的C_(17)和C_(18)量占有优势,有机碳含量(1.0—1.3％)高于南海样(0.3—1.0％),重排甾烷量少,生物构型的ββ藿烷已转变成地质构型的αβ藿烷和βα型莫烷化合物。 相似文献
2.
在草海盆地和柴窝堡湖沉积物中分析鉴定出十几种甾醇、甾二烯醇和甾烷醇等。草海盆地生物输入以陆生高等植物为主,柴窝堡湖以浮游动、植物为主。对比二者甾醇类分布,表明高等植物贡献较多的 C_(29)甾醇,浮游生物、尤其是浮游动物贡献较多的 C_(27)甾醇和其他甾二烯醇等多种化合物;还原条件有利于甾醇转化为甾烷醇,它们在早期成岩作用阶段易于脱水产生甾烯。 相似文献
3.
4.
5.
史继扬 《矿物岩石地球化学通报》1986,(2)
我应印度石油、天然气委员会(ONGC)的邀请,参加了85年11月25—28日在印度台拉登召开的首届“亚非地区石油地球化学勘探国际会议”。这次会议由ONGC所属的KDM(Keshara Dera Malaviya)石油勘探研究所发起。该所在北部的台拉登市,是印度主要从事石油地质,地球化学和地球物理科研单位,拥有一千多名研究、技术人员。印度石油地质界和新闻界对此次会议给予高度的重视。召开这次会议的主要目的是为了交流亚非地区石油地球化学和勘探的研究成果,促进学术交流和技术合作。并借此推动成立亚非石油地球化学学会加强同行间的合作与交流。 相似文献
6.
7.
Presented in this paper are the rypes,salinities,homogenization temperatures and organic components of fluid inclusions formed at the four stages of diagenetic authigenesis in the Eogene of the Biyang Depression.The results of cooling experiments on fluid inclusions were used to determine the fluid system and composition of saline aqueous solution in each of the stages .The homogenization temperatures of saline aqueous solution inclusions and hydrocarbon organic inclu-sions have been corrected by two approaches ,and the trapping temperatures and pressures of fluid inclusions at each of the stages have been obtained.This strdy has shed light on the physicochemistry and evolution of diagenetic fluids.The diagentic fluid system is a system which was transformed from a chloride-bearing to a carbonate-bearing system along with the diagenic evolu-tion.The decrease of diagenetic temperature at Stage III of diagenetic authigenesis suggests that the depression would have experiences uplifting at that time.The fluorescent characteristics of fluid inclusions indicate the varieties of organic components in fluid inclusions both in time and in space. 相似文献
8.
石油演化理论与实践(Ⅱ)——石油演化的实践模型和石油演化的实践意义 总被引：7，自引：1，他引：7
我们在前文中已经讨论了石油演化的机理和阶段,提出了一个初步的石油演化模式。本文则讨论石油演化在石油地质中的应用,包括适用于一定地区的石油演化上、下限标准以及它们在油气远景评价、油气藏成因分析和石油地球化学方面应用等问题。 相似文献
9.
本文研究了泌阳凹陷下第三系四期成岩自生矿物中流体包裹体的类型、盐度、温度和有机组分等性质。由冷冻法确定各期包裹体中盐水溶液的体系和组成,用两种方法对各期盐水溶液包裹体和烃有机包裹体的均一温度进行压力校正获得包裹体捕获温度和压力。包裹体研究结果反映了泌阳凹陷成岩流体的物理化学条件,随成岩演化,成岩流体由氯化物型转变为碳酸盐型;第三期矿物形成时成岩温度降低反映了凹陷的上升作用。包裹体的荧光特征表明包裹体的有机组分在时间和空间上的变化。 相似文献
10.
Experimental Study on Hydrocarbon Formation Due to Reactions Between Carbonates and Water or Water—Bearing Minerals in Deep Earth 总被引：2，自引：0，他引：2
In order to investigate the mechanism of formation of abiogenetic hydrocarbons at the depth of the Earth,experimental research on reactions between carbonates and water or waterbearing minerals was carried out at the pressure of about 1GPa and the temperature range of 800-1500℃.The reactions took place in an open and nonequilibrium state.Chromatographic analyses of the gas products indicate that in the experiments there were generated CH4-dominated hydrocarbons,along with some CO2 and CO.Accordingly,we think there is no essential distinction between free-state water and hydroxy in the minerals in the process of hydrocarbon formation.This study indicates that reactions between carbonates and water or water-bearing minerals should be an important factor leading to the formation of abiogenetic hydrocarbons at the Earth‘s depth. 相似文献