油田开发后期提液井优选的地质条件  

Study on Geologic Condition Optimization of Raising Withdrawal Rates at the Late Stage of Oilfield Development

作　　者：杨永利[1,2] 霍春亮 

机构地区：[1]中国地质大学资源学院,湖北武汉430074 [2]中国石化河南油田分公司,河南南阳473132 [3]中国海油天津分公司,天津塘沽300452

出　　处：《现代地质》2009年第2期333-336,共4页Geoscience

摘　　要：老井放大生产压差进行有效提液是提高注采系统排液能力的一种重要途径。分析了双河油田储层主要微相砂体的产液和吸水能力,认为油田开发后期前缘席状砂提液能力差,而水下分流河道和河口坝具有较强的提液能力;油田开发后期前缘席状砂吸水能力差,难以补充提液后造成油层压力亏空,而水下分流河道和河口坝具有较强的吸水能力,很容易实现注采平衡,保证油井持续提液。同时,从新井钻遇状况、数值模拟和单井水驱曲线分析了油田开发后期剩余油分布状况,认为能用水动力学方法开采的剩余油主要富集在水下分流河道中。因此,双河油田在油田开发后期的提液井应选择在水下分流河道微相砂体的油井中。实践结果也表明,选择在水下分流河道砂体的油井中放压提液能取得较好的稳油控水效果。It is an important way to improve discharge capability of an injection-production system by increasing drawdown pressure in old wells.By analyzing water injectivity and production capacity in main microfacies sandbodies,it is concluded that the distributary channel and the mouth bar have more production capability than the front sheet sand has at the late stage of oilfield development.The sheet sand has too poor water injectivity to make up the shortage of pressure caused by raising withdrawal rate,while the distributary channel and the mouth bar have enough water injectivity to reach injection-production balance and to ensure oil well＇s sustainable discharge.According to the drilling status,numerical simulation and water-drive performance curve of new wells,residual oil distribution is studied at the late stage of oilfield development.It is concluded that residual oil produced by hydrodynamic methods is rich in distributary channel.So the wells for raising withdrawal rates should be chosen in the distributary channel at the late stage of development in Shuanghe oilfield.Practical result also shows that wells in distributary channel chosen for raising withdrawal rates have an apparent effect on stabilizing oil output and controlling water.

关 键 词：提高排液量 微相砂体 产液能力 吸水能力 剩余油 油田开发后期 

分 类 号：TE33[石油与天然气工程—油气田开发工程]