苏北盆地高邮凹陷构造再认识及对油气勘探的意义

高邮凹陷是苏北盆地勘探程度较高的含油气凹陷,近年的勘探对象逐渐向低信噪比地震资料区及深凹带岩性圈闭发展。在构造再认识基础上,处理好构造样式、地震资料以及钻井之间的关系,解决它们之间的矛盾,这既是对以往钻井的重新思考,又是成熟探区精细勘探的必由之路。同时,对深凹带古构造背景和古地理的研究,可以举一反三,指导未知区的岩性油藏勘探,不失为隐蔽油气藏勘探的有效思路。文章结合构造地质理论,通过研究高邮凹陷复杂断裂的构造样式,重构复杂资料区的解释方案,在高邮凹陷复杂断裂带和北斜坡地区取得了新的认识;通过对构造背景与岩性油藏关系的研究,指出了高邮凹陷深凹带隐蔽油气藏的勘探方向。 

Future cognition of the Gaoyou Sag in the Subei Basin and its significance on oil and gas exploration

The Gaoyou Sag is an oil and gas-bearing sag with higher exploration degree in the Subei Basin. In recent years, the exploration targets have gradually shifted to these in the area with low S/N ratio and lithologic traps of deep sag belt. Based on the further structural cognition, dealing with the relation among structural styles, seismic data and drilling data, and solving the contradiction among them are significant for fine exploration in mature exploration areas. Simultaneously, the study on palaeo-structure background and palaeo-geography could guide the lithologic reservoir exploration of the unknown district, which is an effective thinking. Integrated with the structural geologic theory, through the research on the structural style of the complex faults in the Gaoyou Sag and the changing of the interpretation scheme for complex data area, new cognition has been summarized in the complex fault belt and north slope area in the Gaoyou Sag. Through the study on the relation between structural background and lithologic reservoir, the exploration direction for the subtle reservoir in the deep sag belt of the Gaoyou Sag is pointed out.