D油田二类油层聚驱上返时机计算方法  

Calculation of the timing for polymer flooding upward return in the second-class oil layers of D oilfield

作　　者：陈宝玉 董雅婷[1] 冯诗淼 秦旗 杨其浩 CHEN Baoyu;DONG Yating;FENG Shimiao;QIN Qi;YANG Qihao(School of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang Province,P.R.China;Daqing Oil Field Co.Ltd.,Daqing 163453,Heilongjiang Province,P.R.China;The Third Oil Production Plant of Daqing Oil Field Co.Ltd.,Daqing 163113,Heilongjiang Province,P.R.China;The Second Oil Production Plant of Daqing Oil Field Co.Ltd.,Daqing 163414,Heilongjiang Province,P.R.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]大庆油田有限责任公司,黑龙江大庆163453 [3]大庆油田有限责任公司第三采油厂,黑龙江大庆163113 [4]大庆油田有限责任公司第二采油厂,黑龙江大庆163414

出　　处：《深圳大学学报（理工版）》2024年第6期653-658,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：国家科技重大专项基金资助项目(ZX05009-004-006)。

摘　　要：为合理确定不同经济条件下的经济极限含水率,充分考虑油田效益最大化,评估油田生产是否具有经济效益,针对二类油层聚驱潜力层系接替投产时机问题,基于盈亏平衡原理与产量递减规律提出一种明确上返开发时机的新方法.打破选取98%(水的体积分数)作极限含水率行业标准的限制,基于油价、油田实际产出、成本和税金等经济参数,运用投入产出平衡理论,推导出聚合物驱油田单井经济极限含水率计算模型.利用产量递减规律预测处于后续水驱阶段的油层未来含水变化趋势,结合经济极限含水率,明确达到盈亏平衡点的时机,即层系接替投产时机.以D油田二类油层为例,计算不同油价和产液规模下的经济极限含水率,评价油井生产是否具有经济效益,并预测油田含水率变化,明确了开发投产时机.结果表明,经济极限含水率与油价和日产液量均呈正相关,对于具有较高采油速度的化学驱油层而言,高油价下的极限含水率可达99.02%,远超行业标准.根据建立的经济极限含水率模型预测的开发投产时机,延长了油井高含水期效益生产的寿命,大幅度提高了经济效益,对油田化学驱开发具有重要的指导意义.In order to reasonably determine the economic limit of water cut under different economic conditions,and fully consider the maximization of oilfield benefits and evaluate economic benefits of oilfield production,we propose a new method based on the principle of profit and loss balance and the law of production decline to clarify the timing of upward development,in response to the issue of the replacement and production timing of polymer flooding potential layers in the second-class oil layers.Breaking the industry standard of selecting the value of 98%as the limit of water cut,based on oil prices using the input-output balance theory,a calculation model for the economic limit water cut of individual wells undergoing polymer flooding is derived based on economic parameters such as oil prices,actual oilfield output,costs,and taxes.The production decline law is used to predict the future trends in water cut changes in oil layers during the subsequent water flooding stage.Combined with the economic limit of water cut,we determine the break timing for reaching the even point,i.e.,the timing of replacing the layer system for production.Taking the second-class oil layer of D oilfield as an example,the economic limit water cuts under different oil prices and liquid production scales are calculated,evaluating whether oil well production is economically viable and predicting changes in water cut,thereby clarifying the development and production timing.The results indicate that the economic limit water cut is positively correlated with oil prices and daily liquid production.For chemical flooding reservoirs with a high oil recovery rate,the limit water cut can reach 99.02%at high oil prices,significantly exceeding the industry standard.The predicted development and production timing based on the established economic limit water cut model extends the lifespan of economically productive periods during high water cut phases,greatly enhancing economic efficiency and providing important guidance for the chemical flooding developm

关 键 词：油田开发 二类油层 聚合物驱 产量递减 经济极限含水率 开发时机 

分 类 号：TE327[石油与天然气工程—油气田开发工程]