[1]王杨,吴彬.大庆特低渗砂岩单相水启动压力梯度实验研究[J].复杂油气藏,2010,(01):62-65.
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大庆特低渗砂岩单相水启动压力梯度实验研究
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
期数:
2010年01期
页码:
62-65
栏目:
油气开发
出版日期:
2010-03-25

文章信息/Info

作者:
王杨吴彬
中国石油大学石油工程教育部重点实验室,中国石油天然气集团公司长城钻探公司测井公司
关键词:
低渗透油藏启动压力梯度毛细管平衡法渗吸实验研究
文献标志码:
A
摘要:
实验选取4块大庆低渗透砂岩岩心,渗透率分布0.1~110-3μm2,利用毛细管平衡法研究了岩样的非达西渗流过程。本实验周期长达3个月,精确度高,实验结果表明:低渗砂岩岩样存在启动压力梯度,流量-压力梯度曲线呈上凹变化,且随着气测渗透率的降低,曲线逐渐右移;流度越大,启动压力梯度越小,同时通过建立低渗岩样的启动压力梯度和流度的双对数坐标曲线,回归得到了启动压力梯度和流度的关系;实验后期表现出异常的渗吸现象,通过计算渗吸量与孔隙体积的比值(即渗吸度),得到平均渗吸度

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更新日期/Last Update: 2010-05-13