摘要
应用镜下岩石组构分析、电子探针测试、阴极发光技术，在成岩作用研究（成岩作用类型的鉴别、成岩阶段及矿物期次的划分）的基础上，对塔里木盆地叶城凹陷白垩纪至晚第三纪各成岩阶段不同矿物形成期包裹体的均一温度、盐度、密度等物理参数进行了测试，恢复了上述地质时代（地层缺乏镜质体）的古地温，计算了古地热梯度，晚白垩世至早第三纪古地热梯度为２１．４４℃／ｋｍ，中新世古地热梯度为２８．８７℃／ｋｍ。虽然古地热梯度偏低、生油门限深度较大，但埋藏较深的古生界海相油源层热成熟度仍然偏高，有利于天然气成藏与运聚，在本区探获油气的前景应是乐观的。图２表３参８（梁大新摘）
Through the analyses of petrologic fabric under microscope, electron probe measurement and cathodoluminescence method, the diagenesis of K N was studied including distinguishing diagenetic types, differentiating diagenetic stages and their mineral period, and measuring the homogenization temperature and other physical parameters in inclusions in different mineral periods of each diagenetic stage. The paleo temperature of K N in Yecheng depression which lacks vitrinite were restored by inclusion method. Meanwhile, the paleo geotemperature gradients were also calculated, i.e., that of K 2 E is 21.44℃/km, and that of N 1 is 28.87℃/km. Moreover, the relation beween paleo geotemperature and oil gas is inquired into.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1998年第3期26-30,共5页
Petroleum Exploration and Development
基金
"八五"国家科技攻关项目
关键词
白垩地
盆地
晚第三纪
成岩作用
油气成藏
Talimu basin,Cretaceoussystem, Tertiary period, Diagenesis, Paleotemperature, Inclusion (geology), Yecheng sag
