酒西盆地青西地区油气藏裂缝研究

位于酒西盆地西部的青西油田由若干个深层裂缝性油气藏组成，裂缝是油气的主要储集空间，又是油气的主要渗流通道，主力油层段位于裂缝发育段内，油田内裂缝发育区为高产井区。目前已运用多种方法研究裂缝，诸如全直径岩心X－CT扫描、核磁共振分析、成像测井裂缝解释识别、三维地震相干数据体处理以及地震属性提取分析等手段，从裂缝静态特征描述、井筒周围裂缝评价、裂缝分布预测等方面研究裂缝，并确定裂缝发育层段及裂缝发育区分布。

The Study on Petroleum Reservoir Fractures in Qingxi Area of Jiuxi Basin

Qingxi oilfield,located in western Jiuxi basin of Gansu province,is composed of a number of deep frac-tured hydrocarbon reservoirs.Fractures are not only the primary petroleum-storage spaces,but also major percolation flow channel in this area.The major oil zone is situated in well-developed fractural zones which are generally high pro-duction areas in the oilfield.About these fractures,lots of techniques have been applied currently to study such as full diameter core's X-CT scanning,NMR analysis,fractural interpretation/identification by image log,3D seismic phase-interference data processing and seismic attribute extraction analysis,etc.These techniques can be used to study frac-tures by fractural static characterization fractural evaluation around wellbore and fractural distribution prediction,and to determine fracture developed zones and their distributions.