海上厚油层注聚时机对波及效率及前缘的影响研究  

Influence of Polymer Injecting Occasion on the Sweep Efficiency and Sweep Front in Reservoirs with Thick Heterogeneous Oil Layers

作　　者：王智林[1] 杨胜来[1] 雷浩[1] 孟展[1] 王璐[1] 李滢[1] WANG Zhi-lin YANG Sheng-lai LEI Hao MENG Zhan Wang Lu LI Ying(Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum （ Beijing） , Beijing 102249 , P. R. China)

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249

出　　处：《科学技术与工程》2017年第2期197-202,共6页Science Technology and Engineering

基　　金：海洋石油高效开发国家重点实验室开放基金(CRI2012RCPS0154)资助

摘　　要：渤海S油田为具有代表性的海上厚油层油田。以S油田为研究对象,针对该油田的复合反韵律的沉积特性,为了规律的获得,研制了能够代表目标区块储层性质的反韵律二维纵向非均质厚油层物理模型。首先选取了代表性的含水率分别为20%,70%,95%的注聚时机分别进行了聚合物驱替的物理模拟研究。使用电阻值-饱和度法探测模型纵向上的饱和度分布,通过理论计算实现了生产过程中的波及系数、驱油效率的定量化的实时监测。同时通过对模型饱和度云图的动态监测,获得了驱替过程中的波及前缘运移方向及形态。总结得出了不同注聚时机对于厚油层聚驱的波及效率、驱油效率以及波及前缘形态的影响。同时绘制了波及系数图版,为后期油田的波及系数预测提供依据,为其他同类型油藏的开采提供借鉴意义。Bohai S oilfield is a typical offshore oilfield of thick oil layers. Taking it as the research object,an artificial cemented physical model of two-dimensional vertically inhomogeneous thick oil layers is developed,which can represent the characteristics of the reservoir,to simulate the sedimentary characteristics of multiple reverse rhythm of this oilfield. Firstly,physical simulation of polymer flooding is carried out when the injecting occasion is representatively chosen as the water content is 20%,70% and 95%. Next,the resistance-saturation method is used to detect the vertical saturation distribution to realize the real-time monitoring of the sweep efficiency and displacement efficiency by theoretical calculation. At the same time,the migration direction and shape of the swept front in the displacement process are obtained by the dynamic monitoring of the cloud image of oil saturation. A conclusion of the influence of different polymer injecting occasion on the sweep efficiency,displacement efficiency,and the shape of the swept front of thick oil layers were drawn. A sweep coefficient chart is also provided for further prediction of sweep efficiency in the oilfield and can be used as a reference for other similar reservoirs＇ exploitation.

关 键 词：海上厚油层 注聚时机 波及系数 驱油效率 波及前缘 

分 类 号：TE345[石油与天然气工程—油气田开发工程]