摘要
针对薄差层注采井距不合理与储层动用程度低的问题,根据低渗透油藏五点井网注水开发特点,利用面积波及效率公式计算薄差层二次加密井网2套开发层系面积波及效率;运用多元线性回归,拟合面积波及效率数学模型,计算不同注采压差下极限注采井距;利用有效动用系数计算极限注采井距。对比2种方法计算结果,误差在5%以内,证明利用面积波及效率数学模型对极限注采井距求解的正确性,该结果可用于调整薄差层注采井距,改善薄差层开采效果。
In view of the improper injector-producer spacing and low producing degree of thin and poor reservoirs,according to water flooding characteristics of low permeability reservoirs with 5 spot well pattern,areal sweeping efficiency formula was adopted to calculate the areal sweeping efficiency for 2 sets of development strata in the 2nd infilling well pattern for the thin and poor reservoir;multiple linear regression was used to fit the mathematic model of areal sweeping efficiency,which was then used to work out the critical injector producer spacing under different injection-production pressure difference. Meanwhile,effective drainage factor was used to calculate critical injector producer spacing too. Comparison of the results from the two methods shows the error is less than5%,proving that it is proper to calculate critical injector producer spacing with mathematical model of areal sweeping efficiency.The results can be used to adjust the injector producer spacing of thin and poor reservoirs and improve production efficiency of thin and poor reservoirs.
出处
《特种油气藏》
CAS
CSCD
北大核心
2014年第3期75-78,154,共4页
Special Oil & Gas Reservoirs
基金
国家重大专项"大庆长垣特高含水油田水驱开发效果评价及优化方法研究"(2011ZX05052-12)
国家重大专项"薄差油层动用条件及层系井网优化研究"(2011ZX05010-002-05)
研究生创新基金"大庆长垣特高含水油田措施优化方法研究"(YJSCX2012-050HLJ)
关键词
薄差储层
极限注采井距
面积波及效率
有效动用系数
大庆油田
thin and poor reservoir
critical injector producer spacing
areal sweeping efficiency
effective drainage factor
Daqing Oilfield
作者简介
刘义坤（1963-），男，教授，1984年毕业于大庆石油学院油气田开发工程专业，1999年毕业于该校油气田开发工程专业，获博士学位，现从事油气田开发及渗流机理研究工作。
