利用水平井井间加密提高苏10区块开发效果

USING CROSSWELL INFILLING BY HORIZONTAL WELLS TO ENHANCE DEVELOPMENT OF SU-10 BLOCK

苏里格气田苏10区块是一个低渗、低压、低丰度的岩性气藏,针对储层非均质性强、连通性差、单井控制储量少、累计产量低、压力下降快的特点,在直井井网控制基础上,气藏精细描述与地震AVO处理结果相结合,优选区域和层位开展了5口水平井科技攻关和现场试验。水平井投产后,平均单井日产量为直井产量的3～5倍。实践证明,利用水平井进行井间加密是实现区块少井高产、提高低渗气藏采收率的有效途径。

Su-10 block of Sulige gasfield is a lithologic gas reservoir with low permeability, pressure and abundance. According to its properties of strong heterogeneity, poor connectivity, lower controlled reserves of single well, small accumulative outputand fast pressure-loss, based on the pattern control of vertical well, combining the result of both fine description and seismic AVO,this study optimizes some areas and horizons for 5 horizontal wells. After the wells are put into production, the average daily output ofsingle well is 3 to 5 times that of vertical well. Result proves that cresswell infilling by horizontal wells is an effective way to obtain ahigh yield and enhance the recovery of low-permeability gas reservoir.