E区块薄差层井网调整优化研究  

Optimization research on well pattern adjustment on thin and poor reservoir in block E

作　　者：张承丽[1] 王健平 赵震 王鹏 孙铎 刘灏亮 Zhang Chengli;Wang Jianping;Zhao Zhen;Wang Peng;Sun Duo;Liu Haoliang(Department of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China;Tianjin Branch Company of CNOOC Bohai Oil Research Institute,Tianjin 300459,China;Yumen Oilfield Branch Company,PetroChina,Jiuquan 735019,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]中海油天津分公司渤海石油研究院,天津300459 [3]中国石油玉门油田分公司,甘肃酒泉735019

出　　处：《能源与环保》2023年第5期133-136,143,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：黑龙江省自然科学基金项目(LH2020E013)。

摘　　要：E区块由于水驱阶段开发时间较长且井距较大,井网波及效果差、含水率高,为了进一步挖潜剩余油,需要对井网进行调整。试验区油层整体上发育较差,层间差异大,好层、差层垂向上交互分布,如果同时开采,差层难以得到有效动用,所以确定先开发差层、再开发好层的开发次序。目前,E区块葡Ⅰ3层处于三元复合驱后续水驱阶段,产量低,需上返到萨Ⅱ、萨Ⅲ、葡Ⅰ1-2层组,结合三元上返井网和目前水驱井网共设计4套井网调整方案,对薄差层进行井网调整优化研究。采用数值模拟技术建立地质模型,然后在历史拟合的基础上对剩余油进行分析,目前剩余油主要分布在断层边部及井网控制不住的区域。根据方案效果对比结果,推荐方案4(即利用三元上返井网结合14口水驱井的方案),初期含水率为90.34%,初期产能43.15 t,阶段采出程度为16.77%,最终采收率为53.25%。In block E,due to the long development time in water drive stage and the large well spacing,the well pattern has poor sweep effect and high water cut.In order to further tap the remaining oil,the well pattern needs to be adjusted.The oil layers in the test area are poorly developed on the whole,with large differences between layers.Good layers and poor layers are mutually distributed vertically.If mining simultaneously,it is difficult to effectively utilize the poor layer,so the development sequence of first developing poor layers and then developing good layers is determined.At present,PⅠ3 layer in block E is in the water drive stage following asp flooding,and the production is low,so it needs to be returned to SⅡ,SⅢand PⅠ1-2 layer group.Combined with asp upward movement well pattern and the current water drive well pattern,four sets of well pattern adjustment schemes are designed to adjust and optimize the thin and poor layers,and the geological model is established by using numerical simulation technology.Then,the remaining oil is analyzed on the basis of historical fitting.At present,the remaining oil is mainly distributed in the fault edge and the area beyond the control of well pattern.According to the comparison results of scheme effects,scheme 4 is recommended(using asp upward movement well pattern combined with 14 waterdrive wells),with an initial water cut of 90.34%,an initial production capacity of 43.15 t,a stage recovery degree of 16.77%,and a final recovery factor of 53.25%.

关 键 词：井网优化 数值模拟 剩余油 薄差层 提高采收率 

分 类 号：TE323[石油与天然气工程—油气田开发工程]