【摘要】 火山作用具有多期喷发的特点,造成岩相变化快、物性变化大和不同期次的火山岩叠置,从而使地震响应特征复杂,规律性差。目前的三维地震资料只能分辨出火山岩的分布范围,对火山岩喷发旋回和期次的划分、有效储层的预测及油气藏评价仍十分困难,直接影响着石油、天然气藏的有效开发。文章阐述了利用火山岩岩心、薄片和测井资料来划分火山岩喷发旋回和期次的方法,并用该方法对渤海湾盆地KL井区火山岩旋回和期次进行了深入的分析,发现研究区火山岩主要由4个喷发旋回和6个喷发期次组成,4个喷发旋回之间均以沉积夹层或风化壳为边界,并且大规模的火山喷发活动与断层有着十分密切的关系。更多还原

【Abstract】 The volcanic action has the characteristics of multi-stage eruption, which creates the lithofacies change fast, the physical property changes greatly and different stage volcanic rock superimposed, and makes complex seismic response characteristics and poor seismic regularity. The 3D seismic data can only distinguish the distribution range of the volcanic rock at present, it is still difficult not only to divide the volcanic eruption cycle, stage, but also to predict the effective reservoir and evaluate gas pool as well, by which the reservoirs are affected directly. This article introduces some methods to divide volcanic eruption cycle and stage with the core, slice and log information, and by which the volcanic rock eruption cycle and stage of the KL well field in the Bohai Bay are divided, the result show that the volcanic rock are consisted of four eruption cycles and six stages, the interbeds or crust of weathering are as interfaces between the four eruption cycles, and the large scale volcanic eruptions were in close relationship with faults.更多还原