P油田位于渤海湾渤南低凸起带上,在构造高部位走滑断裂带附近发育多条断层。经过多年的开发生产,目前油田构造高部位的主要问题是注采井网连通性差,生产动态反应与断层认识不相符。为了明确构造高部位断层分布模式,解决目前注采井网连通性差等问题,基于井网生产动态资料,结合对复杂走滑断裂带的新认识,利用数值模拟技术研究复杂断块油藏构造高部位储层的连通性,并与地震资料结合相互验证。研究结果表明:P油田走滑断层附近发育多组隐形断层,阻碍了注入水的推进,使得注水井端超压,生产井端亏压,导致油井端产油效果较差。研究结果可为P油田构造高部位后续调整井挖潜剩余油提供参考。

 The P oilfield, situated within the Bonan low uplift belt in Bohai Bay, features multiple faults near the strike-slip faults in high structural regions. Following over a decade of development and production, the main issue in these elevated parts of the oilfield is the weak injection-production connectivity among well networks and the inconsistency between production performance response and fault recognition. To elucidate the fault distribution patterns in these high structural areas and address the poor connectivity within the current injection-production well network, numerical simulation technology is employed, leveraging production performance data from well networks and incorporating new insights on complex strike-slip fault zones. Furthermore, the study is also corroborated by utilizing seismic data for cross-validation. The findings reveal that numerous hidden fault systems have developed close to the strike-slip faults in the P oilfield, hindering the advancement of injected water, leading to overpressure at the injection well end and pressure loss at the production well end, ultimately resulting in suboptimal oil production efficiency. This study can offer valuable insights for future adjustments to wells in the high structural regions of the P oilfield, aiming to exploit the remaining oil potential.