S14断块注采优化调整研究

Research on Optimization and Adjustment of Injection and Production in S14 Fault Block

摘要: S14断块为典型的特低渗透油藏，储层物性差、油井产能低、注水不见效，注水开发效果差，需依靠储层改造工艺进行动用，而压裂后基础井网的适应性或被改变，油藏压裂后水驱效果仍较差，存在注采系统不合理，地下渗流流场不均衡、储量动用不均匀、采收率偏低等主要问题。为此，通过开展油藏精细描述、数值模拟等手段落实剩余油定量分布，根据剩余油分布特征，通过注采系统的优化和调整，以实现储量的均衡动用，最终达到提高采收率的目的。

Abstract: The S14 fault block is a typical ultra-low permeability oil reservoir. The reservoir physical proper-ties are poor, the oil well productivity is low, water injection is ineffective, and the water injection development effect is poor. It needs to rely on reservoir stimulation technology for utilization, and the adaptation of the basic well pattern after fracturing properties may be changed. After reservoir fracturing, the water flooding effect is still poor. There are major problems such as unreasonable injection and production systems, unbalanced underground seepage flow fields, uneven reserve utilization, and low recovery rates. To this end, the quantitative distribution of remaining oil is con-firmed by carrying out detailed description of the reservoir, numerical simulation and other means. According to the distribution characteristics of the remaining oil, the injection and production sys-tem is optimized and adjusted to achieve balanced utilization of reserves and ultimately achieve the purpose of improving recovery.