| 致密砂岩储层CO2驱油特征的核磁共振实验研究 |
| |
| 引用本文： | 郎东江,伦增珉,吕成远,王海涛,潘伟义.致密砂岩储层CO2驱油特征的核磁共振实验研究[J].CT理论与应用研究,2016,25(2):141-147. |
| |
| 作者姓名： | 郎东江 伦增珉 吕成远 王海涛 潘伟义 |
| |
| 作者单位： | 中国石油化工股份有限公司石油勘探开发研究院, 北京 100083 |
| |
| 基金项目： | 科研项目:国家自然科学基金(51504283) |
| |
| 摘 要： | 利用核磁共振技术对致密砂岩储层不同渗透率级别基质岩心和裂缝基质岩心不同驱替压力下CO2驱油特征进行了研究,简述核磁共振原理及实验方法。表明:致密砂岩储层特低、超低渗透基质岩心在初始CO2驱替压力下,岩心毛细孔隙和微毛细孔隙区间的油不同程度被采出,随着CO2驱替压力增大,特低、超低渗透基质岩心毛细孔隙区间油的采出程度不断增加且累积采出程度不同。裂缝致密砂岩储层岩心,裂缝和毛细孔隙区间的油在初始CO2驱替压力下,岩心裂缝中的油及毛细孔隙中的部分油被驱替出来,CO2驱替压力提高毛细孔隙、微毛细区间油的采出程度和累积采收程度较小。致密砂岩储层特低、超低渗透基质岩心和裂缝致密砂岩储层岩心,随着CO2驱替压力增大毛细孔隙区间的部分剩余油成正比增加进入到微毛细孔隙区间改变储层剩余油分布。核磁共振技术能够深入研究致密砂岩储层CO2不同驱替压力阶段,岩心裂缝、毛细孔隙区间、微毛细孔隙区间油的采出程度和剩余油分布情况,对于研究致密砂岩储层微观驱油机理具有较重要的价值。
|
| 关 键 词： | 核磁共振技术 致密砂岩储层岩心 CO2驱油 |
| 收稿时间： | 2015-11-24 |
Study of Displacement Characteristics of CO2 in Tight Sandstone Reservoir by Nuclear Magnetic Resonance |
| |
| LANG Dong-jiang,LUN Zeng-min,LV Cheng-yuan,WANG Hai-tao,PAN Wei-yi.Study of Displacement Characteristics of CO2 in Tight Sandstone Reservoir by Nuclear Magnetic Resonance[J].Computerized Tomography Theory and Applications,2016,25(2):141-147. |
| |
| Authors: | LANG Dong-jiang LUN Zeng-min LV Cheng-yuan WANG Hai-tao PAN Wei-yi |
| |
| Affiliation: | SINOPEC Petroleum Exploration & Production Research Institute, Beijing 100083, China |
| |
| Abstract: | The displacement oil characteristics of different pressure of carbon dioxide (CO2) in cores of different permeability and core with fracture of tight sandstone reservoir are studied bynuclear magnetic resonance (NMR) technology. This paper briefly describes the principle of nuclear magnetic resonance (NMR) and the experimental method. The results show that the tight sandstone reservoir, low and ultra-low permeability core in the initial CO2 displacement pressure,core capillary pores rang and micro capillary pores rang of oil is produced different degree, with CO2 displacement pressure increased, oil recovery degree of core capillary pores rang is increase and cumulative recovery degree is different. Tight sandstone reservoir core with fractures,oil of fractures and the part of oil in capillary pores range in the initial CO2 displacement pressure is displacement, with CO2 displacement pressure increased, oil recovery degree and cumulative recovery degree is smaller in core capillary pores rang and micro capillary pores rang. When CO2 displacement pressure increased, the part of oil of core capillary pores range is proportional to the increase into micro capillary pores rang in tight sandstone reservoir, low and ultra-low permeability cores and fracture tight sandstone reservoir core and change the distribution of residual oil. Thus it is concluded that the nuclear magnetic resonance (NMR) technology can further study of oil recovery degree and the distribution of residual oil under different displacement pressure of CO in capillary pores rang and micro capillary pores rang of tight sandstone reservoir, for the tight sandstone reservoir microscopic oil displacement mechanism is of important value. |
| |
| Keywords: | nuclear magnetic resonance (NMR) technology tight sandstone reservoir core CO2 flooding |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《CT理论与应用研究》浏览原始摘要信息 |
|
点击此处可从《CT理论与应用研究》下载全文 |
|
