渗透率级差对聚合物驱产液指数的影响  

Effect of Permeability Level Difference on Polymer Production Liquid Index

作　　者：王大威[1,2] 何春百 林春阳[1,2] 未志杰 王旭东[1,2] 黄斌 WANG Dawei;HE Chunbai;LIN Chunyang;WEI Zhijie;WANG Xudong;HUANG Bin(State Key Laboratory of Offshore Oil Exploitation,Beijing 100027,P R of China;Technology Research ＆ Development Center,CNOOC Research Institute Co.Ltd,Beijing 100027,P R of China;School of Petroleum Engineering,Northeast Petroleum University,Daqing,Heilongjiang 163318,P R of China)

机构地区：[1]海洋石油高效开发国家重点实验室,北京100028 [2]中海油研究总院有限责任公司技术研发中心,北京100028 [3]东北石油大学石油工程学院,黑龙江大庆163318

出　　处：《油田化学》2018年第2期278-281,295,共5页Oilfield Chemistry

基　　金：十二五国家科技重大专项"海上油田化学驱油技术"(项目编号2011ZX05024-004);中海油研究总院自主创新课题"锦州9-3油田聚合物驱产液变化影响因素及规律研究"(项目编号YXKY-2015-ZY-ZZCX-09)

摘　　要：储层层间物性差异是影响非均质油藏聚合物驱采收率的重要因素。为揭示由水驱转为聚合物驱过程中的产液指数的变化规律,通过物理模拟实验研究了岩心渗透率级差对聚合物驱产液指数的影响。结果表明,由水驱转为聚合物驱的过程中,产液指数变化整体上经历水驱上升段、聚合物驱速降段、聚合物驱缓降段以及聚合物驱回返段四个阶段;在非均质岩心实验中,储层渗透率级差变化对聚合物驱阶段的产液指数下降幅度具有明显影响,具体表现为聚合物注入后产液指数、采收率随渗透率级差的增大而减小。研究结果对于判定存在储层渗透率级差油藏的聚合物驱合理产液下降幅度、预测产液下降周期具有一定的指导意义。The difference of physical properties between heterogeneous reservoirs is an important factor affecting the recovery of polymer flooding. Focusing on the varying pattern of liquid productivity index in the process of water flooding to polymer flooding, the variation of liquid productivity index in different permeability ratio were studied with physical simulation experiment. The experimental results showed that there were four phases for the liquid productivity index in the process of water flooding to polymer flooding： water flooding increasing phase, polymer flooding rapid decreasing phase, polymer flooding gradually decreasing phase and polymer flooding increasing phase. In the heterogeneous core flooding experiment, the change of reservoir permeability ratio difference had obvious effect on the decrease of the liquid production index in the polymer flooding stage, the liquid production index, oil recovery decreased with the increase of the permeability ratio. The experimental results could afford a guide for the reasonable estimation of polymer flooding liquid production decreasing range and the forecasting of polymer flooding liquid production decreasing period.

关 键 词：聚合物驱 渗透率级差 产液指数 产液能力 物理模拟 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]