蒸汽驱注采井网对比优化设计

Comparison and optimized design of flooding patterns Tor steam flooding

针对锦45块试验区生产井蒸汽突破后,难以调整蒸汽波及、采注比偏低的问题,在试验区现有反九点井网的基础上构建反九点抽稀、小回字形、大回字形井网,有效提高采注比。应用Petrel软件进行地质建模,CMG历史拟合,在注采参数优化的基础上进行汽驱过程中注汽速度和适时封堵相结合的调整,综合评价4种井网。结果表明:反九点及小回字形井网有较高经济效益,此项优化设计为稠油油藏气驱开发的井网设计提供理论支持。

For the problems such as difficult adjustment of steam sweep and low ratio of volume injection to production after breakthrough in the producers of the Jin 45 pilot area,the sparaing inverted 9-spot pattern,small square- in- square shaped pattern and large square-in-square pattern are proposed on the basis of the existing inverted 9-spot pattern in the pilot area to enhance effectively the ratio of volume injection to production.Geological model is established by use of software Petrel,and CMC history matching is conducted.Based on optimization of iniection-production parameters,steam injection rate is adjusted during steam flooding in combination with timely blockage.It ia indicated from the result of comprehensive assessment of 4 types of well pattern that inverted 9-spot pattern and small square- in- square shaped pattern have high economic effect.This optimized design provides theoretical support to well pattern design during steam flooding of heavy oil reservoirs.