胜利油区古近系地层水性质对储层物性的影响

Effects of Paleogene Formation Water on Physical Properties of Reservoirs in Shengli Oil Zone

以胜利油区古近系为例,利用数学统计方法和镜下微观资料,探讨了研究区古近系地层水的分布和演化特征,阐述了地层水对储层物性产生影响的机理。对油区内主要凹陷地层水资料和储层物性之间的统计分析表明,在同一沉积盆地中,受沉积环境影响的地层水是影响碎屑岩储层成岩作用最根本的因素,它在纵向和横向分布上的规律性影响着储层物性演变。进而总结了地层水性质和碎屑岩储层物性之间的4种对应关系,得出根据地层水矿化度、碳酸盐含量的高低和储层物性的优劣可以判断储层成岩环境和物性演化历史的认识。

Taking Paleogene of Shengli Oil Field as an example and using statistic method and microscopic data, the analysis of distribution and evolution characteristics of formation water in research area was made, and the mechanism of formation water effects on reservoir properties was studied. It is considered that for a given identical sedimentary basin, the formation water （which is influenced by depositional environment） is the basic factor that affects the reservoir diagenesis, and its spatial distribution affects the evolution of the reservoir physical properties. There exist 4 types of co-relationship between formation water and reservoir physical properties. Through the integrated consideration of formation water salinities, carbonate contents and reservoir properties, the diagenetic environment and evolution of reservoir properties can be estimated.