吉林大学学报(地球科学版) ›› 2020, Vol. 50 ›› Issue (2): 653-661.doi: 10.13278/j.cnki.jjuese.20190264
赵汉卿, 陈晓明, 李超, 吴穹螈, 王迪
Zhao Hanqing, Chen Xiaoming, Li Chao, Wu Qiongyuan, Wang Di
摘要: 为明确渤海湾盆地莱州湾凹陷垦利L油田古近系沙三上段储层物性特征及影响因素,综合利用铸体薄片、扫描电镜、X衍射、孔渗测试、地层测试等多种分析测试手段,结合区域构造背景、沉积体系等相关研究成果,探讨了沙三上段储层物性控制因素,并在油田注水开发中开展了应用。研究结果表明:沙三上段储层平均孔隙度为28.9%,平均渗透率为762.7×10-3 μm2,属于高孔高渗储层,储集空间以原生粒间孔为主,可见次生粒间孔和铸模孔,微裂缝发育;微裂缝平均宽度为180 μm,微裂缝的存在提供了高效渗流通道,使地层孔渗测试结果明显优于岩心测试数据;优质储层的分布主要受体系域、断裂活动和埋藏作用的影响,水进体系域厚层净砂岩是形成优质储层的物质基础,微裂缝发育提高了渗流能力,快速埋藏减缓了储层孔隙水的排出和储层物性的降低。根据优质储层发育特征及生产动态资料,优化水井分层配注,降低平面及纵向上水驱不均,实现了油田均衡驱替。
中图分类号:
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