高含水稠油油藏流场调整技术实践

Engineering Practice of Flow Field Adjustment in High Water Cut Thick Oil Reservoirs

注水油藏在长期注水冲刷过程中,油水井间逐步形成优势流场,使水驱油效率变低。以某油田高含水普通稠油油藏为对象,通过对油藏流场的分布和变化规律的研究,明确流场表征参数并推导出流场强度计算数学模型,确定流线调整的技术界限,利用注采关系调整、生产制度调整及井网完善对策进行流场调整方案编制,形成一套适合特高含水稠油油藏改善水驱开发的技术对策。

The dominant flow field is gradually formed between oil and water wells in the long-term water-injection drainage in waterflooded reservoirs,which lowers the efficiency of waterflooding.Taking a high water cut thick oil reservoir as the object and based on the study of the distribution and variation of the reservoir flow field,this paper defines the flow field characterization parameters and derives the numerical model of the flow field intensity,so as to determine the technical boundary of the flow field adjustment.The flow field adjustment plan is made by adjusting the injection-production relationship,production regime and strategy for improving well patterns,forming a set of technical strategies for improving waterflooding development in the extra-high water-cut thick oil reservoir.