| Tibet area has been considered to be the most important base of energy strategic in China in the 21th century, but the exploration degree is every low because of the formidable natural conditions such as geographic condition and unconveninet traffic. So there are a lot of works to be done in the furture. The conventional method of petroleum exploration can not overcome the limits of the geographic condition and traffic condition to do detailed exploration, so it can not meet the need of exploratory development. But utilizing remote sensing technology to explore oil & gas reservior can overcome the difficulty, which extact structure or hydrocarbon microseepage information from remote sensing images by information extraction techniques mainly. It is a non-invasive technology among the technologies of the exploring oil & gas reservior. It is economical, safe, effective and promising. In conclusion, it is feasible and necessary to apply this technology to explore Tibet area.This paper focuses on Cuoqin basin and Biru Basin. Comprehensive technological routes integrated with multidisciplines have been made aimed at the difficulties of remote sensing interpretation about lithology, strata, linear structure and hydrocarbon microseepage. By the observation of different lithology, strata, linear structure on the field reconnalssance route, the feature of lithology, strata, linear structure in the remote sensing images are reduced. On the basis of it, the interpretation key of lithology, strata, linear structure, is presented. According to interpretation key, the lithology, strata, linear structure and circular structure of whole study erea is interpreted. Aimed at oil & and gas detection, this paper systcmatically sums up hydrocarbon microseepage phenomenon and ground surface corrosion caused by it. By analysis of the ratio of different band of the different oil & and gas microseepage, the remote sensing indicating symbols of oil & and gas microseepage are presented, which are redbed bleaching, clay minerals alteration, carbonate minerals. Oil & and gas microseepage information of remote sensing images over known the oil & gas microseepage in Cuoqin and Biru basin or reservoirs in Lunpola basin is extracted by the method of band ratio composite, principal component analysis (hydroxyl/iron), fusion of band ratio and thermal compute.The relationship between oil & gas abnormal information and oil & gas microseepage or reservoir is analysised. According to the result of extraction, oil & gas normal blocks is defined, on the basis of which, some new perspective areas are submited for oil & gas exploration combinated with oil & gas geological information.The main conclusions and creative ideas are as follows:①The key of interpretation of lithology and strata is presented according to the featur of remote sensing images of different lithology and strata in Cuoqin basin and Biru basin. And then geological mapping of lithology and strata of Cuoqin and Biru basin is modified. The color of clastic rocks is light gray, buff, light purple and so on, which is occurrence in beds. The color of carbonatite is light yellow, beige, brownish red and so on, of which tonality is homogeneous. Carbonatite is occurrence in beds. The color of volcaniclastic rock is celandine green, light red, brow and so on, of which tonality is not homogeneous. The image pattern of volcaniclastic rock is magnophyric. The color of terrain is fulvid, buff, pupplebrown and so on, of which image pattern is pophyritic or circularity.②Through the Remote Sensing Interpretation of Structure in Cuoqin and Biru basin, forty six faults exceed fifty kilometer long and one hundred and ninety three faults between thirty and fifty kilometer long are found. In addition, one hundred and twenty circular structures are found, Seventy three circulars structure in Cuoqin basin, the other in Biru basin.③By analysis of the ratio of different band of the different oil & and gas microseepage, it is shown that ratio of TM1/TM3, TM2/TM3 and TM5/TM7 changes a little. On the basis of it, the remote sensing indicating symbols of oil & and gas microseepage are presented, which are redbed bleaching, clay minerals alteration, carbonate minerals.④Oil and gas information of remote sensing image over the known oil & gas microseepage in Cuoqin and Biru basin and reseriors in Lunpola basin is extracted by different methods such as band ratio, tone abnormity on the basis of fusion of band, thermal compute and PCA (hydroxyl/iron) without interference. The research shows that the resultof PC A ((hydroxyl/iron) without interference is the most reliable.⑤The oil & gas beneficial exploration areas are presented byremote sensing technology and conventional petroleum geology method.Five fisrt class key normal blocks have been defined in study area by theremote sensing technics, the area of which exceeds one thousand squarekilometer. Analyzing with the reservoir-forming geological conditionssuch as source rock, reservoir, caprock and trap, The area enclosed byBiru—Boliechan—Xuba—Bianba and the area enclosed by Shinarule—Baibidingle—Dunba are considered to be the first class oil & gasbeneficial exploration areas. KEY WORDS:Remote Sensing interpretation; oil & gasmicroseepage; linear structure; circular structure; beneficial explorationarea; Cuoqin Basin; Biru Basin...
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