东营凹陷南部樊东地区隐蔽圈闭研究

Study of subtle trap in Fandong area of Dongying sag

樊东地区位于东营凹陷南部缓坡带 ,是各类砂体发育的有利地带。由于其砂层较薄 ,虽能在测井曲线上很好地显示 ,但在地震剖面上难以识别与追踪。为此 ,提出测井 -地震体反演-地质解释三位一体的隐蔽圈闭研究方法 ,即利用测井研究砂层的地球物理响应特征 ,确定砂层及其盖层与波阻抗值的对应关系 ,然后在稀疏脉冲反演获得的地震波阻抗属性体上进行砂体的识别与追踪 ,并在此基础上 。

Fandong area lies on the south gentle slope of Dongying sag and is a favorable place for development of various sands. These sands are thin. They can be seen clearly on log curves but difficult to identify and trace on seismic profile. Integrated logging -seismic inversion -geological interpretation is proposed to study subtle trap, i.e. to study the geophysical response of sands by logging, and to find the correlation of sands and caprock with wave impedance, then to identify and trace sands on the seismic wave impedance attribute cube obtained from sparse spike inversion. On this basis, sand distribution feature and caprock sealing ability are analyzed and studied.