关键词: 火成岩遮挡油藏, 滚动勘探开发, 三维地震, 油藏描述, 剩余油

Abstract: Igneous rock distribute widely in Tertiary in the east of China and the igneous rock reservoirs have "small and rich" features which is important reservoir for extended exploration and development in old areas to seek potential reserves and enhance efficiency,especially,igneous rock screened reservoir.But because of the complexity of space distribution and forming features,high-efficiency techniques are key to achieve task during extended exploration and development.The typical features of igneous rock screened reservoir are studied and concluded in this paper on the basis of seismic T₀ model and seismic interpretation model.In the practice of extended exploration and development of Gao 81 block igneous rock screened reservoir, auther made new discovery in the early,new progress of extended exploration in 1998 and a breakthrough of fine study in 2000,and production capacity of this block incerased significantly.Evidently,the process and study method of the exploration and development of Gao 81 are practical and typical for the farther exploration of eastern old area,expecially the progress of extended exploration and development of "small and rich" igneous rock screened reservoirs.

Key words: igneous rock screened reservoir, extended exploration and development, 3-D seismic reservoir description, bypass oil, horizontal well