深部液流转向剂与油藏适应性研究——以大庆喇嘛甸油田为例  

Adaptability of a deep profile control agent to reservoirs:Taking the Lamadian Oilfield in Daqing as an example

作　　者：卢祥国[1] 王树霞[2] 王荣健[1] 王洪关[3] 张松[3] 

机构地区：[1]东北石油大学 [2]中国石油大庆油田有限责任公司 [3]中国石油勘探开发研究院

出　　处：《石油勘探与开发》2011年第5期576-582,共7页Petroleum Exploration and Development

基　　金：国家油气重大专项课题"高效深部液流转向与调驱和精细分层注采技术"(2011ZX05010-003)

摘　　要：针对大庆喇嘛甸油田油层厚度大、相带组合复杂多样、层内非均质性严重等特点,利用室内岩心驱替实验方法,开展了深部液流转向剂调驱增油效果影响因素及其与油藏适应性研究。结果表明,转向剂用量、强度以及渗透率变异系数对油藏调驱增油效果均有影响:转向剂用量越大,调驱增油效果越好;采收率增幅随转向剂强度增大呈现先增大后减小的变化趋势;渗透率变异系数越大,调驱增油效果越好。岩心流动实验和仪器检测分析研究表明,只有当转向剂的分子线团尺寸及其拟流动岩心孔道半径中值组成的点落在配伍性区域内时,转向剂才可以在孔隙内流动。由此认为,对于非均质油藏,在设计转向剂强度和段塞尺寸时,必须兼顾高、中、低渗透层的特点以及转向剂分子线团尺寸与储集层岩石孔隙半径中值间的匹配关系,以确保转向剂对中、低渗透层的伤害最小。Lamadian Oilfield in Daqing is characterized by thick layers,complex facies combination,and serious interlayer heterogeneity,so influential factors of a deep profile control agent on deep profile control and oil production increase and its adaptability to reservoirs were studied using core flooding tests.The results show that the agent amount,intensity,and permeability variation coefficient（VK） of reservoir all influence the effect of oil production increase after profile modification.The larger the injected volume,the better the stimulation effect.The increment of recovery ratio showed an increase and then decrease trend when agent intensity increased.Larger VK resulted in better stimulation effect.Core flooding tests and instrument detection results show that,the profile control agent can flow in the pore only when the value of molecular group size and the medium value of pore throat radius are in the compatibility zone.Therefore,for a heterogeneous reservoir,the characteristics of high,middle,and low permeability layers and the match relations of agent molecular group size and medium value of pore throat radius of reservoir rock must be taken into consideration when designing the agent intensity and slug,so as to reduce the damage to middle and low permeable layers as much as possible.

关 键 词：转向剂 用量 强度 渗透率变异系数 分子线团尺寸 调驱增油效果 适应性 

分 类 号：TE39[石油与天然气工程—油气田开发工程]