| 利用Sigmoid函数表征超低渗透储层的非达西渗流特征 |
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| 引用本文： | 梅俊伟,彭仕宓,李雄炎,周金煜,于红岩.利用Sigmoid函数表征超低渗透储层的非达西渗流特征[J].西安石油大学学报(自然科学版),2011,26(2):64-67,120,121. |
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| 作者姓名： | 梅俊伟 彭仕宓 李雄炎 周金煜 于红岩 |
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| 作者单位： | 1. 中国石油大学(北京)油气资源与探测国家重点实验室,北京,102249;中国石油大学(北京)地球探测与信息技术北京市重点实验室,北京102249
2. 长庆油田公司勘探开发研究院,陕西,西安,710021 |
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| 基金项目： | 国家高技术研究发展计划(863计划)项目"多尺度三维地质体数字表征关键技术及应用研究" |
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| 摘 要： | 达西渗流产水率模型已难以准确描述超低渗透储层的产液性能,为了准确表征超低渗透储层的产液能力,必须基于非达西渗流特征建立高精度产水率模型.神经元非线性函数Sigmoid的突变性质能较好地描述非达西渗流特征,并可以通过改变系数来控制其突变时间和幅度,因此,引入该函数来构建超低渗透储层的产水率模型.在超低渗透储层,压裂改造措施破坏了油藏状态下含水饱和度与产水率之间的关系;计算方法和实验分析所携带的误差造成计算含水饱和度与油藏状态下含水饱和度之间存在数值差异.分类弥补这一差异之后,利用Sigmoid函数建立的产水率模型计算97口井的产水率,与实际压裂试油的产液数据进行对比分析,相关系数为0.900 4,满足研究区实际勘探开发生产需求.
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| 关 键 词： | 超低渗透储层 非达西渗流 Sigmoid函数 非线性特征 产水率 |
Characterization of the non-Darcy seepage flow in ultra-low permeability reservoir based on Sigmoid function |
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| MEI Jun-wei,PENG Shi-mi,LI Xiong-yan,ZHOU Jin-yu,YU Hong-yan.Characterization of the non-Darcy seepage flow in ultra-low permeability reservoir based on Sigmoid function[J].Journal of Xian Shiyou University,2011,26(2):64-67,120,121. |
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| Authors: | MEI Jun-wei PENG Shi-mi LI Xiong-yan ZHOU Jin-yu YU Hong-yan |
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| Institution: | MEI Jun-wei1,2,PENG Shi-mi1,LI Xiong-yan1,ZHOU Jin-yu3,YU Hong-yan1,2(1.State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China,2.Key Laboratory of Beijing City for Earth Prospecting and Information Technology,3.Institute of Exploration and Development,Changqing Oilfield Company,Xi'an 710021,Shaanxi,China) |
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| Abstract: | The reservoir water-cut model based on Darcy flow cannot accurately describe the water-producing performance of ultra-low permeability reservoirs.The reservoir water-cut model based on non-Darcy flow must be established for ultra-low permeability reservoirs.The sudden-change nature of Sigmoid function can well describe the seepage flow characteristics of the non-Darcy flow,and the sudden change time and the amplitude of it can be controlled by changing the coefficients of the function.The model for calculat... |
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| Keywords: | ultra-low permeability reservoir non-Darcy flow Sigmoid function nonlinear feature water producing rate |
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