| 安塞油田长6油层组长期注水后储层变化特征 |
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| 引用本文： | 靳文奇,王小军,何奉朋,陈堂锁.安塞油田长6油层组长期注水后储层变化特征[J].地球科学与环境学报,2010,32(3). |
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| 作者姓名： | 靳文奇 王小军 何奉朋 陈堂锁 |
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| 作者单位： | 中国石油天然气集团公司长庆油田公司第一采油厂,陕西,延安,716000 |
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| 基金项目： | 国家科技重大专项项目 |
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| 摘 要： | 在注水开发模拟实验及现场测试资料的基础上,以压汞实验、物性测试等方法对模拟实验前后岩芯进行分析,研究了安塞油田长6油层组长期注水开发后储层特征变化规律及成因。结果表明,随着注水量增加,渗透率总体明显降低,渗透率平均变化4.72%;水驱后孔隙度平均增加0.15%,而孔隙组合类型未发生明显变化;退汞效率平均降低4.39%;喉道中值半径变小但分布类型没变化;储层润湿性整体向亲水方向发展。低渗透储层特征发生变化的机理主要是:储层中颗粒和填隙物在注入水的冲刷作用下发生溶解、破碎和迁移,一部分被水冲出,一部分滞留在细喉道处形成堵塞,导致孔喉连通性变差,储层非均质性增强;注入水冲刷作用使储层岩石表面及孔喉表面性质发生变化,进而引起储层润湿性发生变化。
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| 关 键 词： | 低渗储层 孔隙结构 润湿性 注水开发 渗透率 长6油层组 安塞油田 |
Characteristics of Chang-6 Oil-bearing Formation Changes After Long Term Waterflood Development in Ansai Oilfield |
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| JIN Wen-qi,WANG Xiao-jun,HE Feng-peng,CHEN Tang-suo.Characteristics of Chang-6 Oil-bearing Formation Changes After Long Term Waterflood Development in Ansai Oilfield[J].Journal of Earth Sciences and Environment,2010,32(3). |
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| Authors: | JIN Wen-qi WANG Xiao-jun HE Feng-peng CHEN Tang-suo |
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| Institution: | JIN Wen-qi,WANG Xiao-jun,HE Feng-peng,CHEN Tang-suo (No.1 Oil Recovery Factory,Changqing Oilfield Company,China National Petroleum Corporation,Yan'an 716000,Shaanxi,China) |
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| Abstract: | Based on waterflood development simulated experiment and field data analyses,core was analyzed by mercury injection experiment and physical-mechanical test,characteristics of Chang-6 Oil-bearing Formation changes after long term waterflood development in Ansai Oilfield was discussed.The result showed that permeability evidently decreased with the increase of water injection rate as a whole,the average rate of change was 4.72%;porosity increased by an average of 0.15% and there was no apparent change in the ... |
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| Keywords: | low-permeability reservoir pore structure wettability waterflood development permeability Chang-6 Oil-bearing Formation Ansai Oilfield |
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