多层合采试井模型适用性研究及矿场实例分析

发布时间：2019-03-04 09:18

【摘要】：目前多层合采系统渗流理论研究多局限于模型的构建和求解,对多层试井模型的适用范围并未给出明确的说明。引入有效井径模型和无因次井储时间修正了多层合采系统的数学模型,通过解析求解获得了多层油藏典型井底压力曲线图版,与单层模型不同,除了早期续流段曲线出现"驼峰"特征外,处于中晚期流动阶段的曲线也具有"驼峰"和"凹子"的特征。结合渤海油田压力测试资料对该特征进行了论证分析,界定了多层油藏试井模型的适用范围,即储层边界类型不同或层间渗透率级差大(测井渗透率级差大于5)。渤海油田矿场实例分析表明,本文提出的多层试井模型的适用范围合理可靠,可为油气井生产方案实施提供技术支持。
[Abstract]:At present, the percolation theory of multi-layer combined production system is mostly limited to the construction and solution of the model, and the scope of application of the multi-layer well test model has not been clearly explained. The mathematical model of multi-layer combined production system is modified by introducing effective well diameter model and dimensionless well storage time, and the typical bottom hole pressure curve chart of multi-layer reservoir is obtained by analytical solution, which is different from single-layer model. In addition to the "hump" characteristic of the curve in the early continuous flow section, the curve in the middle and late stages of flow also has the characteristics of "hump" and "concave". Based on the pressure test data of Bohai Oilfield, the characteristics are demonstrated and analyzed, and the application scope of the multi-layer reservoir testing model is defined, that is to say, the reservoir boundary type is different or the interlayer permeability difference is large (logging permeability difference is more than 5). The application range of the multi-layer well test model proposed in this paper is reasonable and reliable, which can provide technical support for the implementation of the production scheme of oil and gas wells.
【作者单位】：中海石油(中国)有限公司天津分公司渤海石油研究院;
【基金】：中国海洋石油总公司“十二五”重大项目“陆相砂岩油田优化注水技术研究(编号:CNOOC-KJ125ZDXM06LTD-02)”部分研究成果
【分类号】：TE353

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