致密砂岩气藏负压差水相圈闭损害过程模拟
致密砂岩气藏具有低孔低渗透、高毛管压力、天然裂缝发育和超低含水饱和度等工程地质特征,存在明显的毛管自吸现象,即使在负压差条件下,毛管压力也会使水相逆流自吸进入储层,引起水相圈闭损害.选用鄂尔多斯盆地典型致密砂岩气藏相对低渗透（渗透率小于0.2×10^-3 μm^2）、相对中渗透（渗透率为0.2×10^-3 -0.5×10^-3 μm^2）和相对高渗透（大于0.5×10^-3 μm^2）的3类致密砂岩岩样,开展水相毛管逆流自吸实验和气驱水返排实验,模拟负压差条件下水相圈闭损害发生过程,探讨水相逆流自吸对气相渗透率的影响,评价负压差条件下水相圈闭损害程度.实验结果表明：负压差下水相逆流自吸对气相渗...
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| Published in | 油气地质与采收率 Vol. 23; no. 2; pp. 87 - 92 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
西南石油大学油气藏地质及开发工程国家重点实验室,四川成都,610500%中国石化华北油气分公司石油工程技术研究院,河南郑州,450006
2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1009-9603 |
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| Abstract | 致密砂岩气藏具有低孔低渗透、高毛管压力、天然裂缝发育和超低含水饱和度等工程地质特征,存在明显的毛管自吸现象,即使在负压差条件下,毛管压力也会使水相逆流自吸进入储层,引起水相圈闭损害.选用鄂尔多斯盆地典型致密砂岩气藏相对低渗透（渗透率小于0.2×10^-3 μm^2）、相对中渗透（渗透率为0.2×10^-3 -0.5×10^-3 μm^2）和相对高渗透（大于0.5×10^-3 μm^2）的3类致密砂岩岩样,开展水相毛管逆流自吸实验和气驱水返排实验,模拟负压差条件下水相圈闭损害发生过程,探讨水相逆流自吸对气相渗透率的影响,评价负压差条件下水相圈闭损害程度.实验结果表明：负压差下水相逆流自吸对气相渗透率的损害呈现由岩样物性控制的阶跃式变化特征.同一负压差下,3类岩样气相渗透率损害率为26.5%-34.9%,平均损害率为29.8%;负压差越小,对毛管压力的克服作用越弱,毛管自吸越明显,水相进入岩心位置越深,引起的水相圈闭损害越严重.因此,在欠平衡钻井、完井和开发过程中,确定生产压差时应综合考虑安全作业、储层水相返排等因素. |
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| AbstractList | 致密砂岩气藏具有低孔低渗透、高毛管压力、天然裂缝发育和超低含水饱和度等工程地质特征,存在明显的毛管自吸现象,即使在负压差条件下,毛管压力也会使水相逆流自吸进入储层,引起水相圈闭损害.选用鄂尔多斯盆地典型致密砂岩气藏相对低渗透（渗透率小于0.2×10^-3 μm^2）、相对中渗透（渗透率为0.2×10^-3 -0.5×10^-3 μm^2）和相对高渗透（大于0.5×10^-3 μm^2）的3类致密砂岩岩样,开展水相毛管逆流自吸实验和气驱水返排实验,模拟负压差条件下水相圈闭损害发生过程,探讨水相逆流自吸对气相渗透率的影响,评价负压差条件下水相圈闭损害程度.实验结果表明：负压差下水相逆流自吸对气相渗透率的损害呈现由岩样物性控制的阶跃式变化特征.同一负压差下,3类岩样气相渗透率损害率为26.5%-34.9%,平均损害率为29.8%;负压差越小,对毛管压力的克服作用越弱,毛管自吸越明显,水相进入岩心位置越深,引起的水相圈闭损害越严重.因此,在欠平衡钻井、完井和开发过程中,确定生产压差时应综合考虑安全作业、储层水相返排等因素. TE353.3; 致密砂岩气藏具有低孔低渗透、高毛管压力、天然裂缝发育和超低含水饱和度等工程地质特征,存在明显的毛管自吸现象,即使在负压差条件下,毛管压力也会使水相逆流自吸进入储层,引起水相圈闭损害.选用鄂尔多斯盆地典型致密砂岩气藏相对低渗透(渗透率小于0.2×10 3μm2)、相对中渗透(渗透率为0.2× 10-3～0.5×10-3μm2)和相对高渗透(大于0.5×10-3μm2)的3类致密砂岩岩样,开展水相毛管逆流自吸实验和气驱水返排实验,模拟负压差条件下水相圈闭损害发生过程,探讨水相逆流自吸对气相渗透率的影响,评价负压差条件下水相圈闭损害程度.实验结果表明:负压差下水相逆流自吸对气相渗透率的损害呈现由岩样物性控制的阶跃式变化特征.同一负压差下,3类岩样气相渗透率损害率为26.5％～34.9％,平均损害率为29.8％;负压差越小,对毛管压力的克服作用越弱,毛管自吸越明显,水相进入岩心位置越深,引起的水相圈闭损害越严重.因此,在欠平衡钻井、完井和开发过程中,确定生产压差时应综合考虑安全作业、储层水相返排等因素. |
| Author | 游利军 田键 王娟娟 康毅力 程秋菊 乔国安 |
| AuthorAffiliation | 西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 中国石化华北油气分公司石油工程技术研究院,河南郑州450006 |
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| Author_FL | Wang Juanjuan Kang Yili Qiao Guoan You Lijun Cheng Qiuju Tian Jian |
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| Publisher | 西南石油大学油气藏地质及开发工程国家重点实验室,四川成都,610500%中国石化华北油气分公司石油工程技术研究院,河南郑州,450006 |
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| SubjectTerms | 水相圈闭 致密砂岩气藏 负压差 返排 逆流自吸 |
| Title | 致密砂岩气藏负压差水相圈闭损害过程模拟 |
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