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

发布时间：2018-05-16 21:34

本文选题：稠油 + 蒸汽驱　；参考：《石油钻采工艺》2017年02期

【摘要】：蒸汽驱是稠油油藏水平井蒸汽吞吐进入开发后期主要的接替技术,而水平井的井网形式影响着蒸汽驱的开发效果。以春风油田排601块浅薄层稠油油藏为研究对象,依据相似准则,建立了高温高压三维比例物理模型,并开展了排状井网、五点井网、反九点井网条件下蒸汽驱物理模拟实验。研究结果表明:蒸汽驱过程中温度场的发育主要受注入井与生产井间的驱替压差的控制,注入蒸汽主要流向流动阻力小的区域(临近井、高渗条带、高温低黏油带);蒸汽突破初期,依然有大量的原油从模型产出;实验结束后,蒸汽未波及区域存在大量剩余油。在排601块油藏条件下,排状井网、五点井网和反九点井网蒸汽驱的最终采收率分别为45.10%、41.90%和38.30%;排状井网、五点井网和反九点井网最大累积油汽比分别为0.69、0.63和0.53,综合对比排状井网效果最优。蒸汽驱过程的主要作用机理和现象包括:高温降黏作用、高温体积膨胀、高温蒸汽蒸馏和原油裂解作用、高波及效率和蒸汽超覆。研究结果可以有效支撑春风油田排601块水平井蒸汽驱设计。
[Abstract]:Steam flooding is the main replacement technology of horizontal well steam stimulation in heavy oil reservoir in the later stage of development, and the pattern of horizontal well affects the development effect of steam flooding. Taking the shallow and thin heavy oil reservoir of Block Pai 601 in Chunfeng Oilfield as the research object, a three-dimensional proportional physical model of high temperature and high pressure is established according to the similarity criterion, and the physical simulation experiments of steam drive under the conditions of row well pattern, five-spot well pattern and anti-nine-spot well pattern are carried out. The results show that the development of temperature field during steam flooding is mainly controlled by the displacement pressure difference between injection wells and production wells, and the steam injection mainly flows to areas with low flow resistance (near wells, high permeability zones, etc.) At the beginning of steam breakthrough, a large amount of crude oil is still produced from the model, and after the experiment, there is a large amount of residual oil in the unswept area. Under the reservoir condition of Block Pai 601, the final recovery factors of the row well pattern, the five spot pattern and the inverse nine spot well pattern are 45.101.90% and 38.30%, respectively. The maximum cumulative oil vapor ratio of five-spot well pattern and anti-nine-spot well pattern are 0.69 and 0.53, respectively. The comprehensive contrast row well pattern has the best effect. The main mechanism and phenomena 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 overburden. The research results can effectively support the steam drive design of block Pai 601 horizontal well in Chunfeng Oilfield.
【作者单位】：页岩油气富集机理与有效开发国家重点实验室;中国石化石油勘探开发研究院;
【基金】：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) 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;P08071)
【分类号】：TE357.44

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