摘要
针对低渗透油藏菱形反九点井网至今尚没有产油量计算公式的问题,依据低渗透油藏注水开发理论,应用低速非达西渗流基本公式、流线积分法及单元分析法,推导出了低渗透油藏菱形反九点井网的产量计算公式。菱形反九点井网产量计算方法比正方形反九点井网多了2个单元流量计算公式,达到了4个,而且同样适用于正方形反九点井网。利用鄂尔多斯盆地某低渗透油藏BYS区块的实际生产数据进行计算,相对误差为8%。利用启动系数方法,评价了BYS区块的菱形反九点井网的适应性,经过优化加密调整,已初步取得了显著效果,验证了该方法的可靠性和实用性。
Aiming at the problemthat there is no calculation formula about the yield of rhombic inverted nine-spot areal well pattern in lowpermeability reservoirs up to now,based on the water flooding theory of lowpermeability reservoirs,the yield formula for calculating the rhombic inverted nine-spot areal well pattern was deduced by using the basic formula of low rate non-Darcy flow,flow line integral method and element analysis method.The application range is wider than the square inverted nine-spot areal well pattern.The production rate of eight wells of low permeability reservoirs in the BYS block of Ordos Basin was calculated by the method.The result is close to the real yield,with a relative error of only 8%.Adaptability of the rhombic inverted nine-spot areal well pattern in BYS block was evaluated by using the startup coefficient.Aremarkable result has been obtained preliminarily by the optimization and adjustment in BYS block.
出处
《岩性油气藏》
CSCD
2012年第6期115-120,共6页
Lithologic Reservoirs
基金
国家科技重大专项"鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程"(编号:2011ZX05044)资助
关键词
低渗透油藏
菱形反九点井网
正方形反九点井网
启动系数
产量计算公式
lowpermeability reservoirs
rhombic inverted nine-spot areal well pattern
square inverted nine-spot areal well pattern
startup coefficient
yield formula
