高温高盐油藏化学驱数值模拟技术进展

doi:10.11743/ogg20180619

摘要/Abstract

摘要： 针对高温高盐油藏，胜利油田近年来先后研发了非均相体系、乳液表面活性剂体系等新型驱油体系，其驱油机理与传统化学驱油体系有明显的区别，现有商业化数值模拟软件无法有效表征，而自研数值模拟软件存在运算速度慢、难以支撑大规模矿场应用等难题。依托自主知识产权的化学驱数值模拟软件SLCHEM，在室内实验与机理研究基础上，建立了基于粘弹性颗粒孔喉通过系数的非均相复合驱数学模型以及表征乳液表面活性剂乳化增粘特征的数学模型，实现了相应的模拟功能，开展了室内试验的拟合与矿场模型应用，验证了模型的合理性和准确性；综合应用顺序全隐式快速求解算法、并行解法及交替方向解法，实现了百万级规模模型的快速计算。通过概念模型进行了计算效率测试，在网格数100×10⁴、井数116口、生产历史5a条件下，计算速度为2.9h。室内实验验证与矿场实际应用表明，与商业化软件相比，改造后的SLCHEM软件能够实现对新型驱油体系室内实验结果与矿场动态指标的准确拟合，可为化学驱方案优化与动态分析提供有效的技术支持。

关键词: 快速求解算法, 数值模拟, 渗流机理, 非均相, 乳液表活剂, 化学驱, 提高采收率, 油田开发

Abstract: For the high temperature and high salinity reservoir,Shengli oilfield has developed some new oil displacement systems in recent years,such as heterogeneous system and emulsion surfactant system.The oil displacement mechanisms of these new systems are obviously different from the traditional ones,and could not be described by the commercial numerical simulation software effectively;while the self-developed numerical simulation software is slow in calculation and not suitable for large-scale field application.Based on the SLCHEM,a proprietary chemical flooding numerical simulation software,we established a B-PPG throughput factor-based mathematical model of heterogeneous combination flooding and the mathematical model describing emulsification and viscosification by emulsion surfactant flooding,after the laboratory experiments and study of mechanisms.Through these models,we carried out in-lab fitting and put the models into application,verifying the rationality and accuracy of the mathematical models.In addition,the sequential implicit algorithm,the parallel algorithm and the alternating direction algorithm were applied to fast run the models of mega node scale.The efficiency test for the calculation was carried out through the conceptual model,and the results show that it needs 2.9 hours to run a model with 1 million grids,116 wells and 5 years’ production history.The laboratory test and field application show that,compared with the commercial software,the modified SLCHEM software can realize accurate fitting between the in-lab experimental results and field performance indexes of the new oil displacement systems,so it could provide effective technical support for plan optimization and performance analysis of chemical flooding.

Key words: fast solving algorithm, numerical simulation, seepage mechanism, heterogeneous phase, emulsion surfactant, chemical flooding, EOR, oil field development

中图分类号:

TE357

胡渤. 高温高盐油藏化学驱数值模拟技术进展[J]. 石油与天然气地质, 2018, 39(6): 1305-1310. doi: 10.11743/ogg20180619 Hu Bo. Advances in numerical simulation technology of chemical flooding in high temperature and high salinity reservoir[J]. Oil & Gas Geology, 2018, 39(6): 1305-1310. doi: 10.11743/ogg20180619

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