底水油藏水平井临界产量计算方法  

A method to calculate the critical production of horizontal wells in bottom water reservoir

作　　者：邓勇 陆燕妮 马成 孙宝 罗从勇 DENG Yong;LU Yanni;MA Cheng;SUN Bao;LUO Congyong(China ZhenHua Oil Co.,Ltd.,Beijing 100000,China;Chengdu North Petroleum Exploration and Development Technology Co.,Ltd.,Chengdu,Sichuan 610051,China;Sinopec Southwest Oil&Gas Company,Chengdu,Sichuan 610081,China)

机构地区：[1]振华石油控股有限公司,北京100000 [2]成都北方石油勘探开发技术有限公司,四川成都610051 [3]中石化西南油气分公司,四川成都610081

出　　处：《油气井测试》2022年第4期1-5,共5页Well Testing

摘　　要：隔夹层是影响底水油气藏开发的重要因素,准确预测隔夹层对底水油藏水平井临界产量的影响,是带隔板底水油藏水平井配产的关键。在水平井渗流场分解的基础上,利用等值渗流阻力原理得到各渗流场阻力,结合Dupuit隔板底水油藏临界产量计算原理推导出带隔板的底水油藏水平井临界产量计算方法。实例计算结果表明,临界产量随着垂向渗透率的增大而增大,隔板抑制底水锥进的作用就越显著,在油藏各向异性系数大于0.6之后,临界产量变化逐渐趋于平缓;隔板的大小以及隔板位置也是影响临界产量的关键因素,隔板范围越大,临界产量越大,隔板离底水越近,临界产量越小,在实际钻井过程中,水平段应尽量靠近隔板,设置人工隔板则要尽量远离底水界面。该方法为计算带隔板的底水油藏水平井临界产量提供了理论依据。Interlayer is an important factor affecting the development of bottom water reservoir.Accurately predicting the influence of interlayer on the critical production of horizontal wells in bottom water reservoir is critical to the production allocation of horizontal wells in bottom water reservoir with barriers.Based on the decomposition of seepage field of horizontal wells,the resistance of each seepage field was obtained according to the principle of equivalent seepage resistance.Combined with the Dupuit principle for calculating the critical production from bottom water reservoir with barrier,the method to calculate the critical production of horizontal wells in bottom water reservoir with barrier was deduced.The example calculation results show that the critical production increases with the increase of vertical permeability,and the inhibition of the barrier to bottom water coning is more significant.After the reservoir anisotropy coefficient is greater than 0.6,the change of the critical production tends to be gentle gradually.The size and position of the barrier are also key factors affecting the critical production.The larger the size of the barrier,the greater the critical production;the closer the barrier to the bottom water,the lower the critical production.In practical drilling,the horizontal section should be as close to the barrier as possible,and the artificial barrier should be set as far away from the bottom water interface as possible.This method provides a theoretical basis for calculating the critical production of horizontal wells in bottom water reservoir with barrier.

关 键 词：底水油藏 水平井 底水锥进 渗流场 油水界面 垂向渗透率 隔板 临界产量 

分 类 号：TE349[石油与天然气工程—油气田开发工程]