油藏井间动态连通性及地质控制因素研究——以南图尔盖盆地Konys油田为例

Geological controlling factors of interwell connectivity in Konys oilfield,the south Tuagay basin

为解决南图尔盖盆地Konys油田井间连通性测试成本高、研究周期长等问题,以油水井的产液量、注水量等生产数据为基础,根据系统分析理论,建立油藏井间动态连通性的系统分析反演模型,利用研究区块的示踪剂测试数据对反演模型结果进行验证。结果表明,该研究区块油水井M-Ⅱ油层之间主要存在单向连通、各向均匀连通、单线连通和单井突进连通等4种类型,连通性主要受构型因素和储层物性等地质因素控制,压裂酸化等储层改造措施只影响局部的井间连通性。

In order to solve the problems of high cost and long cycle in the interwell connectivity research of Konys oilfield in the south Tuagay basin,a system analysis model for inversing the interwell dynamic connectivity was established based on the system analysis theory and the production data including fluid production of oil wells and water injection of water wells.The model inversion results have been verified by tracer data in the block and the model was proved to be reliable.It shows that there are four interwell connectivity types between oil and water wells of M-Ⅱ oil layer:One-way connectivity,multidirectional connectivity,single connectivity and single well onrush.The interwell connectivity are mainly affected by the geological controlling factors including configuration element and physical properties of reservoirs,and reservoir stimulation such as fracturing acidification exerts effect on the local interwell connectivity.