基于遥感解译的比如盆地油气潜力分析与有利区预测

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。

Petroleum Potential Analysis and Beneficial Regions Prediction of Biru Basin based on Remote Sensing Interpretation

To explore the oil and gas of the most potential but harsh natural conditions domestic area Tibet,remote sensing interpretation technology was used to study in Biru basin.Firstly 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 were reduced.On the basis of it,the interpretation key of lithology,strata,linear structure was presented.According to interpretation key,the lithology,strata,linear structure and circular structure of Biru basin was interpreted.And then oil and gas information of remote sensing image over the known oil & gas micro-leakage and abnormal information area were superimposed by different methods such as band ratio,tone abnormity on the basis of fusion of band and Principal Component Analysis(Hydroxyl/Iron),finding that hydrocarbon micro-leakage abnormal area and the known gas and oil shows are positive correlation.The abnormal information area and Lunpola basin oil reservoir were superimposed,finding that the abnormal information area and underground reservoir are negatively related.So the hydrocarbon micro-leakage non-anomalies area is possibly the petroliferous area.The hydrocarbon miscro-leakage abnormal area was determined by those methods,and then delineated one first-classic micro-leakage non-anomalies area,combining basin source rock,reservoir,cap-rock and trap conditions,pointed out that the area enclosed by Biru—Boliechan—Bianba was considered to be the first class oil & gas beneficial exploration areas,is the next objective of oil and gas exploration.