第38卷第3期 2016年5月
石
采工
油
钻
艺
OILDRILLING & PRODUCTION TECHNOLOGY
文章编号：10007393(2016)03034106
DOI: 10.13639/j.odpt.2016.03.013
稠油非线性渗流启动压力梯度实验研究
柯文丽12喻高明1-2周文胜”王守磊”廖占山1-2
1.长江大学石油工程学院；2.湖北省油气钻采工程重点实验室；3.中海油研究总院
Vol. 38 No. 3
May2016
引用格式：柯文丽，喻高明，周文胜，王守磊，廖占山，稠油非线性渗流启动压力梯度实验研究［J］，石油钻采工艺，2016， 38(3):341-346
摘要：稠油中股质、沥青质等高分子混合物决定其特殊的结构特性，表现出非线性渗流的特点。启动压力梯度是研究非线性渗流的重要环节。以实际某油田为例，对比分析目前国内外常用的儿种测量启动压力梯度的方法，选择出最佳实验方法，通过实验研究不同渗造率条件下启动压力梯度存在的临界黏度并绘制版图，最后研究自标油田全流度范围内启动压力梯度与流度的关系。实验结果表明：微流量驱替法是较为实用的测量启动压力梯度的方法；目标油田启动压力梯度存在的临界黏度随渗造率的增加而增大，且增大的幅度逐渐子平缓；流度较小时，随流度的增加启动压力梯度下降较快，随着流度的不断增加，启动压力梯度下降幅度减缓
关键词：稠油；非线性渗流；启动压力梯度；界限研究；实验方法
中图分类号：TE345
文献标识码：A
Experimental study on start-up pressure gradient for nonlinear flow of heavy oil
KEWenli,YU Gaoming,ZHOU Wensheng,WANG Shoulei, LIAO Zhanshan
1. School of Pefrolerm Engineering, Yangtze University, Wuhan, Hirbei 430100, China; 2. Key Labonafory,for Oil and Gas Drilling and Producing
Engineering of Hubei Province, Wuhan, Hhrber 430100, China; 3. CNOOC Research Cenfer, Beijing 100027, China
Citation: KE Wenli, YU Gaoming, ZHOU Wensheng, WANG Shoulei, LIAO Zhanshan, Experimental study on start-up pressure gradient for nonlinear flow of heavy oil [ J ] . Oil Drilling & Production Technology, 2016, 38(3): 341-346.
Abstraet: Heavy oil has a special structural property due to the high molecular mixtures of colloid and asphaltene in it, and thus shows a feature of nonlinear flow. The start-up pressure gradient is a key indicator to study the nonlinear flow. Taking an oilfield as an poa eaaaxa ego pe pakee pe paredon peorqe pe poa sinsea oos aos ardexa was selected to define the critical viscosity for the existence of start-up pressure gradient at different permeabilities. Typical curves were prepared. Finally, the relationship between the start-up pressure gradient and the mobility within the full mobility range of the oilfield was diagnosed. The experimental results show that the micro-flow displacement method is a practical method for measuring the start-up pressure gradient. The critical viscosity at which the start-up pressure gradient exists in the oilfield increases with the increase of perme ability, but at a gradually-gentle rate. When the mobility is small, the start-up pressure gradient drops fast with the increase of mobility, and as the mobility increases steadily, the decline rate of start-up pressure gradient slackens.
Key words: heavy oil; nonlinear flow; start-up pressure gradient; limit research; experimental method
非常规油气田的开发逐渐成为人们关注的重点，其中稠油可探明储量与可采储量占有比例较大。自前中国海上稠油、陆地稠油与沥青资源总量约占
石油资源总量的20%以上，具有替代常规石油能源的战略地位「1。开采稠油的首要问题就是研究稠油在储层中的渗流规律，为后期制定开采方案提供理
基金项目：“十二五"国家科技重大专项“基于非线性渗流的水驱制油油藏数值模拟技术及制余油分市模式研究"（编号：2011ZX05024)。第一作者：柯文函(1987-),2013年毕业于长江大学油气田开发工程专业，硕士，主要从事油气田开发方向的研究工作，实验页。通讯地址：
(430100)湖北省武汉市蔡向区大学路特1号长江大学（武汉校区）石油工程学院。E-mail：kewenli2006@163.com
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