摘要
西峰油田庄36区块主力生产层为三叠系长8油层组，采用正方形、矩形及菱形反九点井网超前注水开发、针对目前不同井网的开发特征．主要对三种不同井网的地层压力保持水平、有效压力驱替系统是否建立、水驱状况、含水率上升规律、见水规律、递减规律及自喷情况进行逐一剖析。研究表明：正方形及矩形井网压力有效驱替系统已完全建立，地层压力保持水平较高，单井产能递减小，油井见水比例小，动态采收率相对较高．井网适应性好；菱形反九点井网见水井较多，部分区域注采系统未建立，油井递减大，下步建议通过加强注水及实施周期注水等措施提高开发水平。
The main payzones of Zhuang36 block in Xifeng Oilfield, Triassic; Chang8 oil-reservoirs, are developed by advanced waterflooding in the inverted nine-spot injection patterns of square, rectangle and rhombus. According to the development characteristics eft various well patterns, whether the maintaining level of formation pressure and the effective pressure displacement system of the three well patterns were established or not, the water flooding status, laws of water-cut increasing, injection response, and production declining and blow-well situation are analyzed one by one. Research shows that the effective pressure drive system of square and rectangular well patterns has been fully established, with a high maintaining level of formation pressure. The individual well productivity decline is small. The percentage of response wells is small too. The dynamie recovery efficiency is relatively high, with good adaptability of well pattern. The rhombus inverted nine-spot injection patterns have many wells with response to the injection. An injection-production system has not been established iu some paris of the well patterns, leading to a high decline of oil wells＇ production. It＇ s proposed that for the next step is to improve the level of development by enhancing the water injeetion and imple,nenting the cyclic waterflooding and other measures.
关键词
井网适应性
开发特征
有效压力驱替系统
动态采收率
周期注水
well pattern adaptability
development characteristics
effective pressure displacement system
dynamic recovery efficiency
cyclic waterflooding
