摘要
根据低渗透油田非达西渗流的特点,考虑井网评价的经济因素、完善程度和驱替均匀程度3个因素,在已有的井网密度评价基础上,提出了井网完善系数和平面均匀驱替系数的概念与评价标准,以及影响注采井网合理性的各个单因素之间的权重系数,通过模糊综合评价法分析现有注采井网的合理性。研究认为:低渗透油田井网完善系数达到0.6以上时,井网完善程度较好;平面均匀驱替系数越接近于1,驱替效果越好。实践证明该套指标方法能科学、全面地评价低渗透油田的注采井网且应用简单。
Based on the characteristics of non-Darcy flow in low permeability reservoirs and existing evaluations on well spacing density,this paper proposes the concepts and evaluation criteria of pattern completeness factor and areal uniform displacement factor,as well as a weight coefficient among single factors affecting flooding pattern rationality. The method of fuzzy comprehensive evaluation was applied to analyze the rationality of existing flooding pattern. It has been concluded that for low permeability reservoirs,when the factor of pattern completeness is over 0. 6,the degree of pattern completeness would be favorable;when the areal uniform displacement factor is close to 1,the displacement effect would be better. The practice has proved that this method can scientifically,comprehensively and easily evaluate flooding pattern for low permeability reservoirs.
出处
《特种油气藏》
CAS
CSCD
北大核心
2013年第5期118-121,157,共4页
Special Oil & Gas Reservoirs
基金
陕西省科技统筹创新工程课题"延长油田主力油层小型矿场先导性试验与示范工程"(2011KTZB01-04-06)
关键词
低渗透油田
井网密度
井网完善系数
平面均匀驱替系数
均衡驱替
权重系数
low permeability reservoir
well spacing density
well pattern completeness coefficient
areal uniform displacement factor
equilibrium displacement
weight coefficient
