韦5 断块三角洲前缘储层构型及剩余油分布

高邮凹陷韦5 断块阜一段一砂组三角洲前缘储层剩余油潜力大，但分布规律不明。针对该问题开展了对三角 洲前缘砂体构型特征及其与剩余油分布关系的研究。研究中充分利用岩芯、测井和动态监测等信息，取得如下认识： 在识别出的六级构型界面中，四级界面是层内剩余油分布的主要控制界面；以四级界面为界，识别出8 种成因砂体构 型单元；构型单元内部砂体韵律与构型单元之间的渗流差异控制剩余油分布。研究区内剩余油富集区可划分为边缘 型和孤立型两种，前者主要位于分流河道末梢或边缘、河口坝侧缘，以及与主力构型邻接的天然堤、席状砂和远砂坝； 后者主要位于不与水下分流河道连通的透镜状河口坝、远砂坝等。

ANALYSIS OF INTERNATIONAL LEGAL PROTECTION OF SINO-INDIAN OIL-GAS RESOURCES COOPERATION

The remaining oil potential is great in the delta front in the first sand group of the 1st Member of Funing Formation of the Wei-5 fault block，but the distribution of the remaining oil is not clear. With such data as the core，well logging， dynamic monitoring，the architectural characteristics of the delta front sand body and its relations with the distribution of remaining oil were studied. The results show that among the six recognized orders of bounding surface，the forth order bounding surfaces is crucial to the distribution of remained oil within the layer. Eight facies architectural elements，bounded by the fourth order bounding surface，are identified. Studies found that the configuration of single architectural element and seepage flow differences between elements control the remaining oil distribution. Areas with rich remaining oil can be divided into rim area and isolated area. Rim areas are mainly distributary channel endings or lateral margin edge，mouth bar lateral margin，and natural levee，sand sheet and distal bars. Isolated areas enriched with remaining oil are mainly lenticular sand bodies，such as mouth bar and distal bar，which is not connected with the underwater distributary channel.