松辽盆地三肇凹陷葡萄花油层油-水分布规律及控制因素

基于近4500口探井和开发井动态及静态资料，对三肇凹陷葡萄花油层平面和纵向油-水分布规律进行了研究，发现南、北区油-水分布存在差异.北区油主要分布在断裂密集带上，断裂带之间的构造低部位断层密度低，主要富集水，垂向上具有下水上油的分布特征；南区油大面积连片，垂向上具有全井纯油的特征.造成这种差异的原因是南、北区断层成因机制不同导致控藏机理的根本不同.北区断裂为构造成因，是在近东两向拉张应力场中受斜向裂陷作用影响形成的张扭断裂密集带，断裂活动诱导超压释放和流体排放，油源供给不足；南区发育非构造成因的多边断层，超握诱导断层活动释放流体，油源供给充足.

Distribution laws of oil-water and controlling factors of Putaohua oil layer in the Sanzhao Sag, Songliao Basin

Based on dynamic and static data from nearly 4 500 exploration and development wells, the paper studied planar and vertical oil-water distribution of Putaohua oil layer in the Sanzhao Sag, Songliao Basin.It was discovered that there were many differences of oil-water distribution in southern and northern parts of the sag.In the northern part, the oil mainly distributed in closely spaced belts of faults, and between the closely spaced belts there was a tectonic lower where the water concentrated, so that a oil-water distribution model might be water in the lower part and oil in the upper part vertically.While in the southern part,oil distributed widespreadly,with a character of only oil in the whole well vertically.The reason for the differences between the southern and northern parts might be the genetic mechanism of faultings being varied,which resulted in,furthermore, different mechanisms of reservoir-controlling.In the northern part,the faults were created by tectonic stress,caused by a transtensional action of oblique rifting acompanied with the basin developing.The closed spaced belts of faults led to release of abnormal pressure, discharge of fluids and not enough supplying of oil source.While in the southern part,the faults, developping with a polygonal faulting, were of non-structural mechanism,where the abnormal pressure induced faulting and fluids released, so the oil source was enough.