Abstract: At present, due to active edge water in BQ57 area of target oilfield, the reserve recovery is low. Therefore, it is necessary to study the remaining oil in BQ57 area to ensure good results in thermal recovery process. The distribution law of remaining oil in vertical and plane of layers III 1 and 3 in BQ57 area is studied. The total remaining oil is 43.22 ×104 t. In the vertical, the geologic reserve of layer Ⅲ11 is 17.76×104 t. The remaining geological reserves are 14.72×104 t. The degree of reserve recovery is 17.19%. The geological reserve of layer III12 is the smallest, which is 5.79×104 t. The remaining oil is also less, which is 4.86×104 t. The degree of reserve recovery is 16.09%. The remaining oil in layer III31 is the largest, which is 15.4×104 t. The degree of reserve recovery is 11.20%. The remaining oil in layer III32 is 8.26 ×104 t and the degree of reserve recovery is 6.17%. On the plane, the proportion of remaining geological reserves channel is 52.87% in underwater distributary. Because its distribution area is largest, the proportion of remaining oil is the highest and the value of reserves abundance is the highest. The proportion of remaining oil in front sand sheet is 44.98%. Its value of reserves abundance is also higher. The latter adjustment of well pattern needs to be combined with the productivity potential of a single well, the underwater distributary channel and front sand sheet should be given priority in the adjustment of well pattern.

Key words: Oil field development, Distribution law of remaining oil, Reserves abundance, Degree of reserve recovery

摘要： 目前，目标油田BQ57区由于边水活跃造成油层采出程度低，因此需要对BQ57区剩余油分布进行研究，以期在热采过程中获得较好的效果。通过研究BQ57区Ⅲ1、3层纵向及平面上的剩余油分布规律，得到剩余油总量为43.22×104 t。纵向上：Ⅲ11层地质储量为17.76×104 t，剩余地质储量为14.72×104 t，采出程度为17.19%；Ⅲ12层地质储量最小，为5.79×104 t，剩余油较少，为4.86×104 t，采出程度为16.09%；Ⅲ31层剩余油最多，为15.4×104 t，采出程度为11.20%；Ⅲ32层剩余油为8.26×104 t，采出程度为6.17%。平面上：水下分流河道的剩余地质储量比例为52.87%，由于其分布面积最大，因此其剩余油所占比例最高，储量丰度值也最高；前缘席状砂微相所占剩余油比例为44.98%，其丰度值较高。由于后期井网调整需要结合单井产能，因此井网调整的部位应优先考虑水下分流河道和前缘席状砂。

关键词: 油田开发, 剩余油分布规律, 储量丰度, 采出程度