【摘要】 针对低渗透油藏水平井-直井整体压裂组合井网中裂缝-基质耦合渗流的特殊性,以等值渗流阻力法及叠加原理为基础,采用流场划分原则,划分渗流区域,建立多条横向裂缝相互干扰的水平井-直井整体压裂组合井网产量预测模型。分析水平井压裂缝长、裂缝条数、裂缝位置及与水平井筒的夹角对井网产量的影响,揭示低渗透油藏水平井-直井整体压裂组合井网开采变化规律,指导油田整体压裂开发方案设计。研究结果表明:裂缝条数越多,裂缝干扰越强,水平井压裂存在1个最优裂缝条数;压裂裂缝沿水平井筒等间距排布时,两端长、中间短的开发效果最好;水平井裂缝产生互相干扰时,裂缝越靠近水平段两端排布,开发效果越好;目标水平井-直井整体压裂组合采用矩形七点井网,水平井压裂裂缝与水平井筒最优夹角为60°。更多还原

【Abstract】 The coupling flow from matrix to fractures has its particularity in low permeability reservoir fractured integrally with horizontal-vertical well pattern.Infiltration area is divided based on equivalent flow resistance method and superposition principle as well as the principle of flow field division.A recovery predication model is established for integrally fractured pattern of horizontal vertical wells with multiple transverse fractures which are mutual interference.This paper analyzes the influences of fracture length,number,position and angle on well pattern production,reveals the rule of recovery with such well pattern,and guides the designing of oilfield development program by integral fracturing.The research results indicate that the more the number of fractures is,the stronger the mutual interference of fractures is;there is an optimum number of fractures in horizontal well fracturing;if fractures are aligned at equal spacing along horizontal section,the development response is better when longer fractures are towards both ends and shorter ones in the middle;if fractures interfere with each other,the closer the fractures are to both ends of the horizontal section,the better the development response is;the target horizontal-vertical well pattern was fractured with a rectangular seven spot pattern,and the optimal angle between fractures and horizontal wellbore is 60°.更多还原