微构造油藏勘探实例

孤东油田周边已勘探发现微构造油藏11个，累计探明石油地质储量579万t。微构造圈闭的构造幅度低、含油面积小，常发育于大构造或大油田周边的平缓构造带上，其成藏模式主要有3种，即背斜微构造、断鼻微构造、断块微构造。根据微构造油藏的特点，充分利用现有的高精度三维地震资料、钻井资料，精细解释构造和断层，进行含油性分析，可发现该类油藏。此勘探经验可在具有与孤东油田类似地质特征的油田运用。图3参5

An exploration example of microstructure reservoir

Eleven microstructure reservoirs have been discovered around the Gudong Oilfield, Shengli petroleum province, and the accumulated discovered reserves are up to 5.79 million tons. The microstructures are frequently distributed over the gentle structural belt of some gigantic structure or in adjacency to the big oil field, which could control the distribution of remainder oils. The microstructures could be typed as micro-anticline, micro-fault-nose and micro-block. The microstructures must be interpreted in detail by using high resolution 3-D seismic, drilling and logging information for analyzing and evaluating the formation conditions of reservoirs, including structure and fault and the oil source traps, since they have less scale of oil-bearing and lower oil column.