河流相油藏水平井网水驱波及规律研究  

Quantitative Characterization of Water-flooding Sweep in Fluvial Facies Oilfield

作　　者：王鹏 李超 雷源 翟上奇 闫建丽 WANG Peng;Li Chao;LEI Yu;ZHAI Shangqi;Yan Jianli(Bohai Petroleum Research Institute,CNOOC Tianjin Branch,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459

出　　处：《北京石油化工学院学报》2023年第4期22-27,共6页Journal of Beijing Institute of Petrochemical Technology

基　　金：中海石油(中国)有限公司综合科研项目(YXKY-2018-TJ-04;ZZKY-2022-TJ-01)。

摘　　要：BZ油田为渤海典型的河流相油田,主要采用水平井开发,已进入“双高”开发阶段,面临稳产难度大的问题;基于BZ油田实钻井水淹资料统计分析,发现主流线水淹比例近4年为50%,非主流线水淹比例为15%,非主流线水淹程度较低,且油田主力砂体水驱动用不均匀。笔者根据海上油田井距大、井数少、井网复杂等开发特点,引入表征河流相储层非均质性的特征参数,对陆上油田水驱纵向波及公式进行回归修正,对BZ油田和单砂体进行水驱纵向波及定量表征;基于油田水驱特征曲线法进行油田的体积波及系数计算,根据体积波及系数和纵向波及系数计算平面波及系数。根据水驱波及评价结果,结合BZ油田水驱开发中暴露的问题,指导BZ油田剩余油挖潜。BZ oilfield is a typical fluvial facies oilfield in Bohai Sea.It is mainly developed by horizontal wells.It has entered the stage of“double high”development and is faced with the difficulty of stable production;Based on the statistical analysis of water flooding data of BZ actual drilling wells,it is found that the water flooding proportion of mainstream line is 50%in recent 4 years,and that of non-mainstream line is 15%.The water flooding degree of non-mainstream line is low,and the water drive of main sand body is uneven,which leads to development contradiction.Therefore,it is necessary to conduct a detailed evaluation and Research on the current water drive sweep situation of BZ oilfield.Combined with the development characteristics of offshore oilfield,such as large well spacing,small number of wells and complex well pattern,the author introduces the characteristic parameters to characterize the heterogeneity of fluvial facies reservoir,makes regression correction to the water drive longitudinal sweep formula of onshore oilfield,and quantitatively characterizes the water drive longitudinal sweep of BZ Oilfield and single sand body;The volume sweep efficiency is calculated based on the water drive characteristic curve method,and the plane sweep efficiency is calculated according to the volume sweep efficiency and longitudinal sweep efficiency.According to the evaluation results of waterflooding sweep,combined with the problems exposed in the waterflooding development of BZ oilfield,the remaining oil potential of BZ oilfield is guided.

关 键 词：水淹 纵向波及 俞启泰公式修正 平面波及 海上油田 剩余油 

分 类 号：TE357[石油与天然气工程—油气田开发工程]