Waterflooding is one of the most common secondary recovery methods in the oil and gas industry. Globally, this process sometimes suffers a technical failure and inefficiency. Therefore, a better understanding of geology, reservoir characteristics, rock typing and discrimination, hydraulic flow units, and production data is essential to analyze reasons and mechanisms of water injection failure in the injection wells. Water injection failure was reported in the Middle Miocene Hammam Faraun reservoir at El Morgan oil field in the Gulf of Suez, where two wells have been selected as injector’s wells. In the first well (A1), the efficiency of injection was not good, whereas in the other analog A2 well good efficiency was assigned. Therefore, it is required to assess the injection loss in the low efficiency well, where all aspects of the geological, reservoir and production data of the studied wells were integrated to get a complete vision for the reasons of injection failure. The available data include core analysis data (vertical and horizontal permeabilities, helium porosity, bulk density, and water and oil saturations), petrographical studies injection and reservoir water chemistry, reservoir geology, production, and injection history. The quality of the data was examined and a set of reliable X–Y plots between the available data were introduced and the reservoir quality in both wells was estimated using reservoir quality index, normalized porosity index, and flow zone indicator. Integration and processing of the core and reservoir engineering data indicate that heterogeneity of the studied sequence was the main reason for the waterflooding inefficiency at the El Morgan A1 well. The best reservoir quality was assigned to the topmost part of the reservoir, which caused disturbance of the flow regime of reservoir fluids. Therefore, it is clearly indicated that rock typing and inadequate injection perforation strategy that has not been aligned with accurate hydraulic flow units are the key control parameters in the waterflooding efficiency.

注水是石油和天然气工业中最常见的二次采收方法之一。在全球范围内，此过程有时会遇到技术故障和效率低下的问题。因此，更好地了解地质，储层特征，岩石类型和判别，水力流动单位以及生产数据对于分析注入井中注水失败的原因和机理至关重要。据报道，在苏伊士湾El Morgan油田的中新世中部Hammam Faraun油藏注水失败，那里已选择了两口井作为注入井。在第一口井（A1）中，注入效率不佳，而在其他类似物A2中，注入效率良好。因此，有必要评估低效率井的注入损失，因为地质，地质，由于注入失败的原因，将研究井的储层和生产数据整合在一起以获得完整的视野。可用数据包括岩心分析数据（垂直和水平渗透率，氦气孔隙率，堆积密度以及水和油饱和度），岩相学研究注入和储层水化学，储层地质，生产和注入历史。检查了数据的质量，并确定了一套可靠的数据。引入了可用数据之间的X – Y图，并使用储层质量指数，归一化孔隙度指数和流区指标估算了两口井的储层质量。岩心和油藏工程数据的整合和处理表明，所研究序列的异质性是El Morgan A1井注水效率低下的主要原因。最佳储层质量被分配到储层的最顶部，这导致了储层流体流动状态的干扰。因此，清楚地表明，尚未与精确的液压流量单元对准的岩石类型和不适当的射孔策略是注水效率的关键控制参数。