大庆油田中区西部三次加密井注聚试验效果评价  

Polymer-injection response of tertiary infilling producers in the west-central area, Daqing Oilfield

作　　者：吴淑云[1] 白艳明[1] 宋杰[1] 袁朝晖[1] 

机构地区：[1]中国石油大庆油田第一采油厂

出　　处：《石油勘探与开发》2004年第4期123-125,共3页Petroleum Exploration and Development

摘　　要：随着大庆油田主力油层注聚面积的扩大,适合聚合物驱的一、二类油层剩余储量逐年减少,而多数地区已均匀部署三次加密井,单靠水驱增加储量较少。提出采用三次加密井水驱后补开一、二类油层以外的所有油层(主要是薄差层)注聚增加可采储量的方法,在中区西部密井网试验区内的一个“9注16采”井区开展注聚试验,通过对试验区聚驱效果的分析,3类油层(①封堵厚油层后的原密井网调整对象,②原井网未射孔的薄差油层,③200m左右井距控制不住的窄小河道砂体)注聚后均得到不同程度动用,总的吸水比例达57％,在100m井距条件下注低分子量聚合物,注聚后有效厚度大于0.5m的油层得到了有效控制,是聚合物驱的主要潜力层。中心井聚驱最低点含水86.78％,中心井含水最低点时日产油58t,与见效前相比目增油35t,综合含水下降9.4个百分点。用动态法、静态法、数模法综合评价中心井增加可采储量的结果表明,采用三次加密井注聚的方法预计可使最终呆收率提高约4％。The residual reserves of class 1 and 2 oil layers in the Daqing Oilfield, which are suitable for polymer drive, decreased annually along with the increase of polymer injection area of the main oil-layers. Polymer injection test is carried out in the west-central dense well pattern area, perforating all layers except for class 1 and 2 layers. According to the test results, 3 types of layers are produced and the water injectivity percentage reaches 57%. The injection of low molecular weight polymer with well space of 100m results in effective control of the layers with effective thickness of more than 0.5m, which are the main potential polymer drive layers. The recoverable reserves increase for the center wells were evaluated by using performance analysis, static method and numerical simulation, which reveals that the reservoir recovery could be increased by 4% by polymer driving the tertiary infilling wells.

关 键 词：三次加密 聚合物驱 薄差层 表外储集层 吸水能力 可采储量 效果评价 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] TE327