文昌A油田低阻油层生产出水分析

Analysis of Production Water from Low Resistance Reservoir in Wenchang A Oilfield

文昌A油田构造是在基底隆起的基础上发育的低幅披覆背斜构造,构造完整平缓,油田两翼的倾角均下陡上缓,各油组构造特征在纵向上有明显的继承性。文昌A油田珠江组一段上层序(Z1-Z4)发育多套低阻油藏,岩性为泥质粉砂岩,浅海席状砂沉积。本文结合油田开发历程及油组生产现状,从平面、层间、层内不同角度对演技求含水上升规律进行总结。基于研究区含水上升规律的总结,利用动态和静态资料有机结合的方法,总结了研究区的出水水源和出水类型。

The structure of Wenchang A Oilfield is a low-amplitude draped anticlinal structure developed on the basis of basement uplift.The structure is complete and gentle,and the dip angles of both wings of the oilfield are steep and gentle.The structural characteristics of each oil group have obvious inheritances in the longitudinal direction.In the upper sequence(Z1-Z4) of the first member of Zhujiang Formation,Wenchang A Oilfield,there are several low resistivity oil reservoirs,lithology is argillaceous siltstone and shallow sea mat sand deposit.Based on the development history of oil field and the production status of oil group,this paper summarizes the law of water cut from different angles of plane,interlayer and intra layer.Based on the summary of the rule of water cut rise in the study area,the effluent source and effluent type of the study area were summarized by organically combining dynamic and static data.