水驱油田特高含水阶段无效水循环带的判别方法——以渤海B油田为例  

Identification method for invalid water circulation zone in ultra-high water cut stage of water drive oilfield——by taking Bohai B Oilfield as an example

作　　者：钟洪娇 王涛[1] 田苗[1] 寇双燕 ZHONG Hongjiao;WANG Tao;TIAN Miao;KOU Shuangyan(China Oilfield Services Limited,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司,天津300459

出　　处：《石油地质与工程》2023年第6期68-71,共4页Petroleum Geology and Engineering

摘　　要：水驱油田特高含水期,随着水驱开发的深入,油田含水饱和度增加,相渗曲线中水相渗透率快速上升,且在油田的开发后期,高过水倍数下,水相渗透率会急剧增加,呈现K ro/K rw与S w的关系曲线快速偏离直线的现象,造成无效水循环带的形成。为此,需要对油田特高含水阶段无效水循环带的判别方法进行深入研究。针对渤海B油田的实际岩心以及开发动态数据进行了分析,筛选出含水率高于90%的油井,分析单井含水率导数变化及水驱特征曲线,对含水率导数出现峰值、水驱特征曲线出现偏离直线且上翘的油井鉴定为存在无效水循环带,明确了该油田无效水循环带的判别方法。利用这种方法,对渤海B油田高含水油井进行了筛选,并实施了相应治理措施,取得了很好的增油效果。During the ultra-high water cut period of water drive oilfields,with the deepening of water drive development,the water saturation increases,and the water phase permeability in the permeability curve rapidly increases.In later oilfield development stage,under high water multiple,the water phase permeability will sharply increase,showing a phenomenon of K ro/K rw and S w relationship curve rapidly deviating from the straight line,resulting in the invalid water circulation zones.In order to solve this problem,it is necessary to conduct in-depth research on the identification methods of invalid water circulation zones.Therefore,based on the analysis of the actual core and development dynamic data of Bohai B oilfield,and oil wells with a water content higher than 90%were selected.The variation of water content derivative in a single well and the water drive characteristic curve were analyzed.Oil wells with peak water content derivative and deviation from the straight line and upward trend of the water drive characteristic curve were identified as having an invalid water circulation zone,and the identification method was clarified.By using this method,high water cut oil wells in Bohai B Oilfield were screened and corresponding control measures were implemented,achieving good oil increase results.

关 键 词：渤海B油田 无效水循环带 特高含水 水驱特征曲线 含水率导数 含油饱和度 

分 类 号：TE357[石油与天然气工程—油气田开发工程]