渤海南部薄互层油藏层系调整界限实验研究及应用  

Experimental study and application of layer series adjustment limit of thin interbedded reservoir in southern Bohai Sea

作　　者：阳晓燕 王龙 吴晓慧 何芬 江远鹏 YANG Xiaoyan;WANG long;WU Xiaohui;HE Fen;JIANG Yuanpeng(Tianjin Company,CNOOC(China)Co.,Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《石油地质与工程》2022年第1期62-67,共6页Petroleum Geology and Engineering

摘　　要：A油田是渤海典型薄互层油藏之一,具有纵向上层数多、单层厚度薄且物性差异大的特点,采用大段合采方式开发过程中,部分油井表现出产量递减快、见水早等问题。为进一步改善开发效果,开展了双管水驱实验及三维非均质水驱实验研究,明确了薄互层油藏层间干扰特征、不同渗透率级差下层间干扰程度,即渗透率级差越大,干扰程度越严重,当渗透率级差控制在3以内时,层间干扰影响较小,各层驱替较均匀;同时结合油水两相动态运移规律及高含水阶段的剩余油分布特点,有效指导渤海南部A油田细分层系开发方案的制定以及产液结构调整,并首次提出渤海南部区域薄互层油藏层系细分调整的渗透率级差界限。研究成果对后续薄互层油藏开发方案编制以及油田调整挖潜具有指导意义。Oilfield A is one of the typical thin interbedded reservoirs in the Bohai Sea,which is characterized by many vertical upper layers,thin single-layer thickness and large differences in physical properties.In the development process of large section combined production,some oil wells show problems such as rapid production decline and early water breakthrough.In order to further improve the development effect,the double pipe water drive experiment and 3D heterogeneous water drive experiment were carried out to clarify the characteristics of interlayer interference and the degree of interlayer interference of different permeability levels in thin interbedded reservoir,that is,the greater the permeability level difference,the more serious the interference degree is.When the permeability level difference is controlled within 3,the influence of interlayer interference is small and the displacement of each layer is relatively uniform.Meantime,combined with the law of oil-water two-phase dynamic migration and the distribution characteristics of remaining oil in high water cut stage,it can effectively guide the formulation of subdivision layer series development plan and the adjustment of liquid production structure in oilfield A,and then the permeability differential limit for subdivision adjustment of thin interbedded reservoirs is proposed for the first time.The research results are of guiding significance to the development planning of thin interbedded reservoirs and the potential development of oilfield adjustment.

关 键 词：早期细分层系 调整界限 薄互层油藏 双管并联 三维水驱实验 

分 类 号：TE357[石油与天然气工程—油气田开发工程]