惠民凹陷江家店地区隐蔽油藏储集层预测

Subtle trap reservoir prediction in Jiangjiadian area of Huimin sag.

断层生长指数不仅与断层活动速率有关 ,而且还与沉积速率有关 ,在有严重剥蚀的情况下该指数被严重歪曲。断层活动速率在数值上等于某时期内断层落差与相应时间的比值。同时利用断层生长指数与断层活动速率两种研究手段 ,对惠民凹陷临南地区的断层活动强度进行研究 ,将结果与各地层单元的沉积速率进行比较 ,发现各地层单元的生长指数不可比 ,而断层活动速率的研究结果揭示了断层活动的幕式性 ,与火山岩分布、构造沉降曲线的变化相吻合。总体来说 ,沙三段、东营组沉积期为临南洼陷断裂强烈活动期 ,东营组沉积期断层活动强度大于沙一段沉积期。钱官屯、曲堤地区的二级断层在东营组沉积末期的活动强度大、封闭性差 ,结合原油产层的分布 ,推测两地区油气成藏在馆陶组沉积以后。明化镇组沉积期局部断层的活动强度加大 ,油气有较明显的纵向运移。断层生长指数在实践中的应用有待商榷。图 1表 1参 3(王孝陵摘 )

Subtle trap reservoirs (especially those in the thin sand bodies) are the main target of progressive exploration and development of petroleum in the eastern oil fields of China. For which it is very difficult to predict their lithological traps. In the prediction of sand bodies for Jiangjiadian area of Huimin sag, integrated geology, well logging, 3-D seismic data, and well-logging constrained seismic inversion are used for identifying these bodies, in which the continuity analysis of 3-D seismic data and phase analysis are used to predict the distribution of sand bodies, and the width over height ratio of amplitude and phase, the ratio of surrounding were peak and wave trough and its average amplitude as well as wave impedance value are used to predict the thickness of sand body and the shaliness. This method is successfully used and will be spread widely.