大港油田埕海二区Z29X1断块油藏注水开发试验评价

Experimental Evaluation of Water-flooding in Z29X1 Fault Block Reservoir Development in Chenghai 2 Area of Dagang Oilfield

大港油田埕海二区Z29X1断块油藏是白云质灰岩复杂断块油藏,为适应提高采收率的需要,注采井网必须精细化研究和管理。在明确研究区注水开发试验目的的基础上,通过地质研究将埕海二区整体进行重新划分。通过对井数及井型进行调整,达到已有注水方案优化的目的。从注入量及产能评价两方面对Z29X1断块油藏注水效果进行了分析,结果表明,井网重新优化组合能有效地控制含水率、改善水驱开发效果。

Z29X1 Fault Block Reservoirs in Chenghai 2 Area of Dagang Oilfield was a complex fault block reservoir with limestone dolomite(LST DOL).It was necessary to implement fine study and management for water-flooding patterns for the purpose of enhancing oil recovery.Based on the understood target of water-flooding test in the studied area,Chenghai 2 Area was re-identified by geological study.By adjustment of well number and well patterns for the optimization of waterflooding program,the optimized program is obtained.Waterflooding effect of Z29X1 Fault Block Reservoir is analyzed through water-injection quantity and productivity evaluation.The result indicates that the optimized well patterns can effectively control water-cut and enhance oil recovery.