基于流管法断块油藏加密调整水驱波及评价方法

Evaluation method of water flooding sweep in fault block reservoirs with infill adjustment based on stream-tube method

张宏友 王月杰 雷源 杨明 刘文政

中海石油（中国）有限公司天津分公司渤海石油研究院，天津 300452

Bohai Oilfield Research Institute, Tianjin Branch of CNOOC Ltd., Tianjin 300452, China

断块油藏多采用不规则注采井网开发，传统流管模型仅限于固定规则井网水驱波及快速评价，无法考虑不规则井网的动态加密调整。文中采用三角形流管单元实现不规则井网的流管划分及计算，提出了加密调整后流管计算单元划分和饱和度场转换方法，建立了动态流管模型并编制计算算法，形成了断块油藏加密调整水驱波及评价方法。以渤海BZ￣3油田A井区为研究对象，开展了加密调整水驱波及效果影响因素分析和井组加密调整研究，井区开发效果改善明显。该方法可为断块油藏动态加密调整水驱波及评价提供理论基础和依据。

Fault block reservoirs are mostly developed by irregular injection-production well pattern. The traditional stream-tube model is only used for the rapid evaluation of water flooding sweep in the fixed regular well pattern, but it cannot be applied to the dynamic infill adjustment of the irregular well pattern. In this paper, the triangular stream-tube unit is used to divide and calculate the stream-tube of irregular well pattern. The method of division of stream-tube calculation unit and saturation field conversion after infill adjustment is proposed to establish the dynamic stream-tube model and compile the calculation algorithm, and to build up the evaluation method of water flooding sweep in fault block reservoirs with infill adjustment. Taking well area A of Bohai BZ￣3 oilfield as an example, the influence factors of water flooding sweep effects with infill adjustment are analyzed and well group infill adjustment are studied, which has a good development effect. This method can provide a theoretical basis for the water flooding sweep evaluation in fault block reservoirs with infill adjustment.

10.6056/dkyqt202205018