分支水平井与压裂水平井参数优化对比研究

COMPARATIVE STUDY ON PARAMETER OPTIMIZATION OF MULTI- LATERAL HORIZONTAL WELLS AND FRACTURED HORIZONTAL WELLS

针对影响分支水平井、压裂水平井产能的主要因素，分别研究了分支数目、分支长度、分支角度、裂缝数目、裂缝半长、裂缝角度对分支水平井和压裂水平井产量的影响规律，并进行了对比分析。研究结果表明：分支参数和裂缝参数对分支水平井和压裂水平井的影响规律在整体上比较相似，增大井简、裂缝与储层的接触，降低井筒与井筒、裂缝与裂缝之间的干扰是两种井型增产的关键，分支水平井应采用不小于100m的分支长度、不小于60。的分支角度和尽可能多的分支数目进行生产，压裂水平井应采用不小于60。的裂缝角度、5条以上的裂缝和较大的裂缝半长进行生产。

Aiming at the main factors influencing the deliverability of multi-lateral horizontal wells and fractured horizontal well, the influence patterns of branch number, branch length, branch angle, fracture number, fracture half length and fracture angle on productivity of multi-lateral horizontal wells and fractured wells are analyzed respectively, and meanwhile a comparative analysis is conducted. The result shows that the influencing patterns of branch parameters and fracture parameters on multi-lateral horizontal wells and fractured horizontal wells are gener- ally similar. Increasing the contact of well bores and fractures with reservoir, and reducing the interference between well bores and that between fractures are the key to the stimulation for these two kinds of wells. For multi-lateral horizontal wells, the branch length of no less than 100 m, branch angle of no less than 60°and branches as many as possible should be adopted to produce oil. For fractured horizontal wells, fracture angle of no less than 60°, more than 5 fractures and relatively large fracture half length should be adopted to recovery oil.