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亚诺斯盆地C区(研究区)处于勘探初期,钻井、测井资料有限,地球物理资料相对丰富。以地震属性、地震相分析为主,结合钻井、测井资料对工区新近系Carbonera组3段河道砂体识别、展布与古水流方向进行了研究。研究表明:综合利用三维地震相干属性与均方根振幅属性,可降低不等时问题及后期构造的影响。识别出2条以高相干、强振幅为代表由南向北展布的主水下分流河道。井震结合标定了槽形、峡谷—水道充填等地震相代表的水下河道,验证地震属性识别水下河道的可靠性。在确定河道展布的基础上,利用相带分析法和地震前积反射确定研究区内古水流方向为北、北西向。
Zone C of Yanos Basin (research area) is in the early stage of exploration. Drilling, logging data are limited, and geophysical data are relatively abundant. Based on seismic attributes and seismic facies analysis, combining with drilling and well logging data, the identification, distribution and paleo-water flow direction of the third member of Carbonera Formation in the work area are studied. The results show that the comprehensive utilization of 3D seismic attributes and root mean square amplitude properties can reduce the problem of inequality and the influence of later tectonics. Two main underwater distributary channels that are distributed from south to north, represented by high coherence and strong amplitude, are identified. Well-seismic combined with the calibration of underwater channel represented by seismic facies, such as trough, canyon-channel fill, verify the seismic attributes to identify the reliability of underwater channel. On the basis of determining the distribution of the watercourse, the facies analysis and pre-seismic reflection are used to determine the direction of the ancient water flow in the study area to north and northwest.