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为对国内最具潜力但自然条件恶劣的西藏地区进行油气勘测,用基于遥感解译的技术对比如盆地进行了研究。首先通过对野外踏勘路线上岩性、地层和线性构造的观察,归纳出不同岩性、地层和线性构造在遥感影像图上的特征,建立了岩性、地层、线性和环形构造解译标志,完成了比如盆地岩性、地层、线性构造和环形构造解译。其次应用比值法(油气点微渗漏)、融合法(遥感波段融合色调异常)、主成分分析法(羟基/铁质信息异常)对已知油气出漏点和异常信息进行叠加,发现烃类微渗漏信息异常区与已知油气出漏点存在正相关性,用烃类微渗漏异常信息和已知伦坡拉盆地油藏区叠加,发现烃类微渗漏信息异常区和地下已知油气藏负相关,从而确定了烃类微渗漏非异常区可能为含油气区。通过3种方法得出油气烃类渗漏异常区,进而圈定重点一级烃类微渗漏非异常区一处,并结合盆地的生、储、盖条件,指出了比如—伯列蝉—边坝所圈定的区域为油气勘探有利区域,是未来油气勘探的目标。
In order to conduct oil and gas surveys on the most potential but poor natural conditions in Tibet, remote sensing interpretation techniques such as basin research have been conducted. First of all, through the observation of lithology, strata and linear structure on the reconnaissance route in the field, the features of different lithology, strata and linear structures on the remote sensing image are summarized, and the interpretations of lithology, stratigraphy, linearity and ring structure are established. Completed such as basin lithology, stratigraphy, linear structure and ring structure interpretation. Secondly, the leakage ratio and the anomaly information of the known oil and gas were superposed by the ratio method (micro-point leakage of oil and gas), the fusion method (anomaly of remote sensing band fusion) and the principal component analysis (hydroxyl / iron information anomaly) There is a positive correlation between the anomalous area of micro-leakage information and the known oil-gas leakage point. Using the micro-leakage information of hydrocarbon and superposition of the known oil fields of Lunpola Basin, it is found that the hydrocarbon micro-leakage information anomaly area and underground Knowing the negative correlation of oil and gas reservoirs, it is determined that the non-anomalous area of hydrocarbon microleakage may be a hydrocarbon-bearing area. Three kinds of methods are used to get the hydrocarbon leakage anomaly area, and then to delineate a non-anomalous area of hydrocarbon microleakage in the key first-order. According to the conditions of raw, reservoir and capment in the basin, The area delineated by the dam is a favorable area for oil and gas exploration and is the target of future oil and gas exploration.