低渗透油藏仿水平井注采井网产能

发布时间：2018-08-23 20:38

【摘要】：仿水平井技术可大幅度增加单井泄油面积和控制储量,实现了低丰度、特低渗透油藏的有效动用。为比较该技术与传统水平井技术开发效果的不同,对仿水平井不同开发井网稳态产能进行精确快速预测,以仿水平井渗流特征为基础,基于流管流线积分方法建立了不同井网形式考虑启动压力梯度的仿水平井产能预测模型。与实际产量对比表明,所建立产能预测模型得到的计算结果具有较高的准确度(最大误差为8.04%)。通过应用所建立模型进行计算对比可知,仿水平水井长度相同时,交错井网稳态产能大于正对井网稳态产能,波及面积较大,开发效果较好,而且正对井网对水井长度的敏感性大于交错井网。该研究对特低渗透油藏仿水平井井网注水开发具有一定的理论指导意义。
[Abstract]:The horizontal well simulation technology can greatly increase the oil discharge area and control reserves of single well and realize the effective production of low abundance and very low permeability reservoirs. In order to compare the development effect between this technology and the traditional horizontal well technology, the steady productivity of different development pattern of horizontal well is predicted accurately and quickly, based on the percolation characteristics of the simulated horizontal well. Based on the streamline integration method, the productivity prediction model of horizontal well with different well patterns considering starting pressure gradient is established. The comparison with the actual production shows that the calculated results obtained by the established productivity prediction model have high accuracy (the maximum error is 8.04%). Through the calculation and comparison of the established model, it can be seen that when the length of horizontal well is the same, the steady productivity of staggered well pattern is larger than that of positive well pattern, the sweep area is larger, and the development effect is better. Moreover, the sensitivity of well pattern to well length is greater than that of staggered well pattern. This study is of theoretical significance for the development of horizontal well pattern injection in very low permeability reservoirs.
【作者单位】：中国石油大学(华东);中国石化胜利油田分公司工程技术管理中心;
【基金】：中央高校基本科研业务费专项资金(14CX05025A,14CX02045A) 国家自然科学基金项目(51490654)
【分类号】：TE348

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