彰武地区中生代张强凹陷地热史研究

Study on Geo thermal History in Mesozoic Era of ZQ Depression in Zhangwu Area

对张强凹陷粘土矿物Ｘ射线衍射谱线特征及有机质干酪根类型的定性分析和镜质体反射率（Ｒ０）与温度之间关系的定量模拟计算，恢复了凹陷的地热史；通过古热流的计算，恢复了凹陷的热沉降史，从定量的角度进一步证实了凹陷古热流在时间上表现为由低→高→低的变化规律，从而证实了凹陷属于裂谷盆地．通过研究，指出对凹陷进行进一步勘探开发有利的生油层位．

In order to further explore and develop ZQ Depression of Zhangwu Area,the paper restored the geo thermal history of the depression by quantitatively analysing the diffracted ray characteristics of X ray for clay mineral in the depression,qualitatively analysing the type of organic kerogen and quantitatively simulating and computing the relationship between vitrinite reflectivity (Ro) and temperature,and restored the heat setting history by computing the paleo heat transfer.From the quatitative point of view,it is further proved that the change of paleo heat transfer in the depression followed the law of“low high low”with time,which proves that the depression belongs to a rift basin.By study,the paper pointed out the preferable oil generating intervals for further exploring and developing the depression,and programmed for the computer with C language for systematically studying the geo thermal history of the basin.Results of the study are as follows:(1)In this area,the paleo geotemperature is higher than the present geotemperature;the change of heat transfer with time comforms with the changing law of a rift basin,so it belongs to a rift basin;(2)The paleo geotemperature determined by the method of anthigenic mineral and that of vitrinite reflectiuity is the same,the former is little higher;(3)The method of vitrinite reflectivity is more suitable for this area;(4)The difference between the heat transfer value of this area and that of SL Basin can be interpreted by the location of heat swell.