关键词: 济阳坳陷, 重力勘探技术, 潜山, 断裂, 构造, 冲积扇

Abstract: The gravity data in Jiyang Depression were interpreted.The methods for application of the gravity technique to petroleum exploration were determined.The survey gravity data were used to define the structural pattern and divide the structural zones.The gravity anomaly analysis on trend surface and horizontal derivative processing were used to define the basement fracture system and fault locations.Various fracture structures were defined on the basis of comprehensive analysis of gravity data in the different scale.The regional geological data and the gravity trend surface analysis technique were used to investigate the structural variation in the northern Jiyang Depression.Various gravity curves obtained by different interpretation and processing methods were analyzed.The buried hill of Chexi Sag were defined by vertical second derivative.The buried hill in the south of Chengning Uplift was determined by gravity data.A large number of favorable targets were discovered.It is shown that the gravity analysis technique will still play an important role in high-degree exploration areas with development of high-resolution gravity technique for obtaining the high-efficiency and low-cost exploration targets.

Key words: Jiyang Depression, gravity exploration technique, buried hill, fracture, structure, alluvial fan