石油钻采工艺2017，Vol.39Issue(2)：138-145,8.DOI:10.13639/j.odpt.2017.02.003
春风油田排601块水平井蒸汽驱井网类型优化物理模拟实验
Physical simulation experiment for the optimization of steam flooding horizontal well patterns in Pai 601 Block of Chunfeng Oilfield
摘要
Abstract
Steam flooding is the dominant technology replacing horizontal-well steam soaking in the late development stage of heavy oil reservoirs, and its development effect is impacted by the style of horizontal well pattern. In this paper, the heavy oil reservoir in shallow thin layers in Pai 601 Block, Chunfeng Oilfield was taken as the study object. A high temperature/high pressure 3D scaled physical model was established according to the similarity criteria. Then, physical simulation experiment was carried out on steam flood-ing in row well pattern, five-spot well pattern and inverted nine-spot well pattern. It is indicated that the growth of temperature field in the process of steam flooding is mainly controlled by the displacement pressure difference between injection well and production well.The injected steam mainly flows to the areas of low flow resistance, such as adjacent well, high permeability belt and high-temperature low-viscosity oil band. In the early stage of steam breakthrough, a large amount of crude oil is still produced from the model. After the experiment ends, there is abundant remaining oil in unswept regions. In the oil reservoir conditions of Pai 601 Block, the ultimate recovery factor of steam flooding in row well pattern, five-spot well pattern and inverted nine-spot well pattern is 45.10%, 41.90%and 38.30%, respectively, and their maximum cumulative oil/steam ratio is 0.69, 0.63 and 0.53, respectively. Based on comprehensive comparison, the effect of row well pattern is the best. The main mechanisms and phenomena in the process of steam flooding include high-temperature viscosity reduction, high-temperature volume expansion, high-temperature steam distillation and crude oil cracking, high sweep efficiency and steam overlapping. The research results provide the effective support for the design of horizontal-well steam flooding in Pai 601 Block, Chunfeng Oilfield.关键词
稠油/蒸汽驱/水平井井网/物理模拟/温度场/采收率/驱替机理Key words
heavy oil/steam flooding/horizontal well pattern/physical simulation/temperature field/recovery ratio/displacement mechanism分类
能源科技引用本文复制引用
王海涛,伦增珉,吕成远,赵清民,何应付,骆铭..春风油田排601块水平井蒸汽驱井网类型优化物理模拟实验[J].石油钻采工艺,2017,39(2):138-145,8.基金项目
国家自然科学基金"核磁共振技术研究裂缝性致密油藏注二氧化碳提高采收率机理"(编号:51504283) （编号:51504283）
中国石油化工股份有限公司科技开发部项目"水平井蒸汽驱物理模拟与数值模拟研究"(编号:P12108),"热化学复合体系开发超稠油机理研究"(编号 （编号:P12108）
P08071). （）
