陵二西区三间房组油藏储层动用状况分析

The analysis about the used extent of Sanjianfang formation reservoir in the west of Ling 2 fault block

目的研究丘陵油田陵二西区三间房组油藏储层动用状况的影响因素。方法利用油田的动静态资料、测井资料、录井资料等进行综合分析。结果一般注采比越高,储层动用程度也越高;平面上砂体分布面积广、连片性好、钻遇率高的小层动用较好,反之则较差;辫状河道沉积的砂体动用程度好于溢岸沉积的砂体;剖面上的动用程度与沉积的旋回性及韵律性有关,一般正韵律的储层动用程度较差,复合韵律的储层动用程度较好,并且随着时间的推移动用好的小层会越来越好,动用差的小层会越来越差;渗透率大小较其非均质程度对储层动用控制作用更为明显,但当渗透率接近时,渗透率的非均质程度对流体渗流才会起到明显的影响;但也有相反的情况,还有待于进一步研究。结论研究例区储层动用程度的好坏与多种因素有关。

Aim To master the affecting factors about the used extent of Sanjiantang tormation reservoir whicn is m the west of Ling 2 fault block of Qiuling Oil Field. Methods Make a synthetic analysis by using the dynamic and static state datum, logging and well log datum. Results Generally, the higher injection-producing amount ratio, the higher the used extent of reservoir. If the sandstone distribute widely the used extent of reservoir will be higher in plane, otherwise it will be lower. The sedimentary micro faces in which the sandstone is located can also affect the extent in plane, for examples, the used extent of reservoir will be higher whose sandstone locate in braided channel than the sandstone located in flood plain;Usually, the sedimentary cycle and rhythm are related to the used extent of reservoir in section plane. When sedimentary cycle is normal, the used extent of reservoir will be lower than com- plex sedimentary cycle, and the difference will come larger along with the time going. In generally, the permeability is more important than heterogeneous extent of it to control the used extent of reservoir. And when permeability is close, the heterogeneous extent of permeability will control the extent obviously. But the contrary instance occurs in sometimes, so the research should be done deeply. Conclusion The research indicates that the used extent of reservoir is affected by manifold factors.