堡子湾耿43井区长4+5段开发调整方案设计及优选

Development plan adjustment and optimization of Chang 4+5 reservoir in Geng 43 well field in Puziwan area

堡子湾耿43井区长4+5段油藏在开发过程中存在部分油井产能下降较快、水淹严重、注采井网不完善和局部无井网控制等问题。为了有效控制产能下降,完善注采井网,通过对本区块的动态分析及数值模拟研究,得出综合治理对象是剩余油富集区和层系。因此对开发层系、井网分布、加密新井等作出了相应调整,并提出了最优方案:对位于各层可动剩余储量较高、油层有效厚度较厚的部位的部分井进行补孔和堵孔;转注低产高含水油井;在剩余油密集区钻探加密井。对方案效果进行了预测,结果表明,在最优方案下预测产油量显著上升。

In the development process of Chang 4＋5 reservoir in Geng 43 well field in Puziwan area,there exist many problems such as rapid decline of deliverability in some wells,serious flooding,imperfect flooding pattern and non-well network control in local.In order to control the production decline effectively and improve flooding network,the dynamic analysis and numerical simulation study are carried out,and it is concluded that comprehensive regulated objects are remaining oil enrichment area and layer system.So the relevant adjustments are conducted to development layers and well pattern,and the optimum program is put forward： reperforating and plugging holes in the areas where has a higher movable remaining reserves or thicker effective pay thickness in some wells;converting low-yield and high water cut oil wells to injection wells;drilling infillers in the remaining oil enrichment area.The forecast result of the program shows that oil recovery increases remarkably under the optimum program.