胜坨油田不同含水期油水平面运动规律

Areal oil-water movement rules of Shengtuo Oilfield during different water cut sta-ges

以胜坨油田沙二段1-3砂层组河流相正韵律油层和沙二段7-8砂层组三角洲前缘相反韵律油层为研究对象,采用地质统计、数值模拟和动态监测等方法,分析了不同含水期油水的平面运动规律。研究表明,在中低含水期,正韵律油层平面油水运动明显受沉积亚相带的控制,局部水淹带形成早,反韵律油层平面油水运动主要受注采井网控制,水淹带形成较晚;在高含水期,正反韵律油层水淹程度加剧,沉积亚相带的控制作用减弱;在特高含水期,正反韵律油层水淹均十分严重,主要受注采井网的控制,沉积微相带对剩余油分布起到一定的控制作用。

The positive rhythmic reservoir of fluvial facies in 1-3 sand group and the reverse rhythmic reservoir of delta front facies in 7-8 sand groups of Es2 were studied in Shengtuo Oilfield. Using the methods of geostatistical a-nalysis,numerical simulation and dynamic monitoring etc,the areal oil-water movement rules of the reser-voir were analyzed during different water cut stages. The research presents that the areal oil-water move-ment of the positive rhythmic reservoir is obviously in- fluenced by sedimentary subfacies belt with early ap-pearance of local water-flooded zone,but the areal oil -water movement of the reverse rhythmic reservoir was mainly influenced by flood pattern with late appearance of the local water-flooded zone during the low-medi-um water cut stage;the water-flooded degree of two kinds of reservoirs was serious and the influence of sed-imentary microfacies belt on remaining oil distribution became weaker during the high water cut stage;the wa-ter-flooded degree of two kinds of reservoirs were very more serious and mainly controlled by flood pattern,the sedimentary microfacies influenced the remaining oil distribution in some degree during the extra high water cut stage.