珠江口盆地流花礁灰岩油藏的储集条件复杂、非均质性强.综合珠江口盆地A油田地震、测井、沉积和地质等资料,分析其礁灰岩储层的沉积微相、隔夹层等对储层非均质性的影响;进而在相控条件约束下,利用熵权法对储层非均质性进行定量评价,并建立不同约束条件下的随机储层非均质综合评价模型.实例研究结果显示,该方法可以定量表征储层质量参数和几何形态参数;综合储层非均质综合评价模型与油藏动态资料,确定研究区储层非均质综合指数为0.5 ～ 0.7的区域为剩余油分布潜力区,且剩余油主要富集于研究区礁体西北翼、东南翼以及靠近西南翼断层的构造高部位.在剩余油分布潜力区部署9口水平井,均获得较高的平均日产油量,与ODP设计日产油量相比,提高至少50 m3/d,且平均含水饱和度上升较缓慢,剩余油分布潜力区具有较长的稳产时间.因此,利用熵权法对礁灰岩储层非均质性进行定量评价的结果基本可以表征其储层的非均质特征.%Reservoir development of Liuhua reef limestone is complex,and its heterogeneity was very strong in the Pearl River Mouth Basin.Based on seismic,well logging,sedimentary and geological data in A Oilfield,the impact of sedimentary microfacies,interlayer,physical properties and seepage dynamic information of the reef limestone on the reservoir heterogeneity was analyzed,and then the reservoir heterogeneity was evaluated quantitatively under conditions of sedimentary facies constraint using the entropy weight method,and a stochastic model of the comprehensive reservoir heterogeneity evaluation was established under different constraint conditions.The results show that this method can quantitatively characterize reservoir quality parameters and reservoir geometry parameters.According to the result of comprehensive evaluation of reservoir heterogeneity and reservoir dynamic data,the distribution of remaining oil potential area is predicted in the area with heterogeneous synthetic index 0.5-0.7,and the remaining oil is mainly enriched in the northwest wing,southeast wing and the structural high position near the fault.Nine horizontal wells were deployed in the predicted potential areas where the average daily oil output was at least 50 m3/d higher than that of the ODP design production.And the average water saturation increased relatively slow.The potential areas had longer stable time for daily production.The predicted results evaluated by entropy weight method match well with the actual spatial heterogeneity of reservoir.
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