稠油低效水平井综合治理技术研究

Study on Comprehensive Treatment Technology of Low Efficiency Horizontal Wells in Heavy Oil

针对稠油注蒸汽开发水平井低产低效问题,首先运用动态分析法对所有水平井进行评价分析,查找低效原因,将低效井分为高含水、低液低产、出砂三类;其次开展隔夹层分布、累产油、避水厚度等因素对产能影响的研究,同时运用油藏工程方法,确定不同类别低效水平井剩余油分布规律,综合分析油藏条件及潜力;最后对不同类别低效水平井优选措施实施分类治理。

In view of the problem of low production and low efficiency of horizontal wells in heavy oil steam injection development, the dynamic analysis method was used to evaluate and analyze all horizontal wells, the causes of low efficiency was found out, and the low efficiency wells were divided into three categories of high water cut, low liquid and low production, and sand production. The influence of interlayer distribution, cumulative oil production, water avoiding thickness and other factors on productivity was studied. At the same time, the reservoir engineering method was used to determine the remaining oil distribution law of different types of low efficiency horizontal wells, and the reservoir conditions and potential were comprehensively analyzed. Finally, the classification management was implemented for the optimal selection measures of different types of low efficiency horizontal wells.