摘要
砂岩透镜体油藏是岩性油气藏中增储上产的重要类型,但目前对其成藏机理的认识还存在很大分歧。通过二维实验模拟表明:砂岩透镜体自身的物性好坏对其成藏具有重要的影响,所形成油藏的含油饱和度随着孔隙度、渗透率的增大而增大;油总从高势区向低势区运移聚集成藏,势的大小决定了砂岩透镜体成藏的可能性。"相"和"势"相互耦合,共同控制砂岩透镜体的成藏,油气成藏动力(势)充足时成藏所需要的储层渗透性能下限就相应降低;相应地,储集岩渗透性能好,要求的成藏动力条件(势)就可以适当降低。得出了实验条件下透镜体成藏时的"相"和"势"之间的定量模型,为预测圈闭成藏可能性提供了一个思路。
Sand lens reservoir is accumulation mechanism is not the main type of lithologic reservoirs for increasing reserves, but its migration and understood well. The result of 2D physical experiment shows that the physical property of sand lens is closely related to its accumulation, and the oil saturation of sand lens reservoirs varies consistently with the change of the porosity and permeability. Oil always migrates from high potential zone to low potential zone and accumulates in the sealed low potential zone. Fluid potential determines whether sand lens can be input by oil or not. Physical properties and fluid potential are the two main controlling factors for the accumulation of sand tens reservoirs.
出处
《岩性油气藏》
CSCD
2008年第1期69-74,共6页
Lithologic Reservoirs
基金
中石化重点科技攻关项目“济阳坳陷不同岩性组合砂体“相-势”控藏机理研究”资助(编号:P06016)
关键词
透镜体
岩性油气藏
模拟
流体势
主控因素
sand lens
lithologic reservoirs
modelling
fluid potential
main controlling factors
