江苏油田油气藏基本特征及其分类

Basic Characteristics and Classification of Hydrocarbon Reservoirs in Jiangsu Oilfield

朱　平

Zhu Ping

江苏油田分公司

Jiangsu Oilfield Company , SINOPEC,Jiangsu 225009 , P. R. China

江苏油田经过20 多年的勘探,已经发现并开发了20 多个油气田,以及一批出油构造和出油点。在第三纪时期苏北盆地经历了坳陷—断陷—坳陷3 个发展阶段,形成了多个凹陷,油气田主要分布在高邮凹陷、金湖凹陷和海安凹陷。油气田总体属于复杂小断块群构造,断层多,断块小。受区域构造和气候旋回的影响,发育砂岩、碳酸岩和火山岩等多种储层类型,储层物性与沉积相和地质层位关系密切。油藏具有正常的温度和压力系统,原油性质与油藏所在凹陷及构造位置有关,高邮凹陷的油藏原油性质普遍较好,金湖凹陷次之,海安凹陷最差。在总结油藏基本特征的基础上,选择能综合反映油藏储层性质和原油性质的流度大小把各油藏分成了3 种类型。

More than 20 oil & gas fields , several oil producing structures and spots have been discovered and developed in Jiangsu Oilfield during it s over 20 years’ process of exploration and development . Some sages have been formed after Subei basin goes through three developing stages , which is from down - warp , fault depression and down-warp.The oil & gas fields mainly distribute in Gaoyou , Jinhu and Haian sag. The structures of oil & gas fields generally belong to complicated small faults structure , which the basic features are much fault and small faulted blocks. Being influenced by the area structure and climate , the different reservoirs of sandrock , carbonic rock and volcanic rock are developed. Physical properties of reservoirs are closely related with the sedimentary facies and geologic horizon. Reservoirs have normal temperature and pressure systems and the crude properties are related with structure Positions and the sag which the reservoir belongs to. Amng them , crude properties of reservoir in GaoyOu sag is the best , the second J inhu , the last Haian. On the foundation of summarizing reservoir basic features , reservoir can be divided into three types by the mobility , which reacts comprehensively the properties of reservoir and crude oil.