| 杜江民.苏东区块盒8段储层微观孔隙结构特征研究[J].地质与勘探,2016,52(2):340-345 |
| 苏东区块盒8段储层微观孔隙结构特征研究 |
| Characteristics of micro-pore structure of reservoirs in He 8 section of Shihezi Formation in the Sudong block of the Ordos basin |
| 投稿时间：2015-07-23 修订日期：2016-01-18 |
| DOI： |
| 中文关键词: 鄂尔多斯盆地 盒8储层微观孔隙结构 恒速压汞 喉道 |
| 英文关键词: Ordos Basin, He 8 section of Shihezi Formation, micro-pore structure of reservoir, constant-rate mercury, throat |
| 基金项目:国家自然科学基金项目（41302076) 与河北省教育厅科研项目（QN2015255）联合资助 |
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| 中文摘要: |
| 鄂尔多斯盆地苏东区块盒8段储层是典型的致密砂岩储层, 影响储层质量的因素较为复杂。以铸体薄片、扫描电镜和物性分析等资料为基础，对储层微观孔隙结构特征进行了定性分析，同时应用恒速压汞方法对储层微观孔隙结构进行了定量描述。研究结果表明:苏东区块盒8段低渗储层物性主要受喉道控制,而不是孔隙；平均喉道半径越大，微观均值系数越小,相对大喉道越多,排驱压力越低,则储层微观孔隙结构越好,储层微观孔隙的品质也越好。因此,喉道是影响致密砂岩储层质量的主要微观地质因素。 |
| 英文摘要: |
| The reservoirs of He 8 section of the Shihezi Formation in the Sudong area of the Ordos basin are characterized by dense sandstone, where comlex factors influence the quality of the reservoirs.?Based on conventional methods such as casting slice, scanning electron microscope(SEM) and physical property analysis，characteristics of reservoir microscopic pore structure have been qualitatively analyzed, then quantitatively described by constant-rate mercury injection technique. The results show that the quality of reservoirs is mainly controlled by the throat rather than pore. The greater the average throat radius, the smaller the micro average coefficient. When there are more relatively large throats, the expulsion pressure is lower. Consequently microscopic pore structure of reservoirs is better, implying a good quality of microscopic pore structure. Therefore, throats are the primary microscopic geological factor which affects the quality of tight sandstone reservoirs. |
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