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为了研究松南地区陆相砂泥岩薄互层储层岩石物性横向变化、微构造等对油气聚集的影响和探索利用高分辨率井间地震技术直接指示油气分布的可能性,开展了井间地震及地面小三维地震、VSP、测井等立体地震观测.使用了自行研制的井中炸药震源和常规地震记录仪器.采用层析成像方法、反射资料叠前偏移成像方法等对采集到的资料进行研究,得到了不同分辨率的地下构造和岩石物性信息,展示出不同方法技术在分辨薄储层能力上的差异.高分辨率的井间地震成果较好地实现了井间地层对比,查清了两井间储层横向变化和油气分布情况.层析速度与构造信息等的综合应用解释了两井油气产能差异的原因,建立了油气地质模型.所得成果显示出井间地震技术在油气开发中的潜力.
In order to study the lateral variation of petrophysical properties and micro-structure of the thin interbedded sandstone-shale reservoirs in the Songnan area, and to explore the possibility of using the high resolution crosswell seismic technology to directly indicate the distribution of oil and gas, Ground small 3D seismic, VSP, logging and other three-dimensional seismic observation. In-house exploratory explosives sources and conventional seismographs were used. By using tomographic method and reflection data prestack migration imaging method, the collected data are studied and the subsurface structures and petrophysical properties at different resolutions are obtained, showing the differences in the ability of different methods in resolving thin reservoirs . The high-resolution interwell seismic results have achieved well correlation between wells and found the lateral variation of reservoir and oil and gas distribution between the two wells. The comprehensive application of tomographic velocity and tectonic information explains the reason of the difference between Liangjing oil and gas production capacity and establishes the petroleum geological model. The results show the potential of crosswell seismic technology in oil and gas development.