松辽盆地西部斜坡带烃类微渗漏遥感信息提取

HYDROCARBON MICROSEEPAGE DETECTING BY REMOTE SENSING IN WESTERN SLOPE OF SONGLIAO BASIN

松辽盆地西部斜坡带位于吉林省西部白城地区。 2 0多口探井证实 ,油气显示主要集中在东北部套保地区 ,油气显示最好的井是洮 13井 ,其次为洮 5井和洮 6井。烃类微渗漏遥感直接探测技术是一种直接找油方法 ,是 90年代以来发展的一种新方法 ,目前已被国内外石油勘探部门广泛应用。通过对液态、气态、固态石油物质光谱特征的分析 ,采用比值处理 ,如TM 4/TM 7、TM 4/TM 5、TM 4/TM 3来增强微弱的烃类微渗漏异常 ,并将波段的比值或原波段进行彩色合成提取了研究区烃类微渗漏异常 ,其结果与已知钻孔的含油气情况一一对应 ,同时在研究区西北角发现一些新的油气渗漏异常区 ,可作为研究区油气勘探进一步工作的优先靶区 ,对研究区的油气勘探有较好的指导意义。

The western slope of Songliao basin is located in Baicheng district, western Jilin province. It has been certified by more than 20 exploring bores that oil gas occurrence is concentrated in Taobao area, northeast of Songliao basin, the best of which is Well Tao 13 and the second in Well Tao 5 and Well Tao 6. Hydrocarbon microseepage detecting by remote sensing is a new method which can be directly applied to oil exploration domestically and overseas in a wide range since 1990s. Based on the analysis result of the spectrums of gaseous, liquid and solid petroleum and chossing the proper bands and ration processing, such as TM4/TH7, TM4/TM5, TM4/TM3, the weak abnormity of hydrocarbon microseepage has been elarged. The microseepage information has been extracted in remotely sensed images by compose processing the hand ratio or the original hand, the result of which is consistent to the reality of oil gas occurrence revealed in the exploration bores. At the same time, new area of hydrocarbon has been found in the northeast of the study area, which can be served as the preference target for future exploration. Therefore, this method is significant for oil gas exploration.