EN绿泥石与CO2溶液反应实验研究
Experimental study on reaction of chlorite with CO2 aqueous solution
- 油气藏评价与开发 2022年第5期 页码：777-783+808
- 作者机构：
1. 中国石油新疆油田公司百口泉采油厂,新疆 克拉玛依 834000西南石油大学,四川,成都,610500
2. 西南石油大学,四川 成都 610500中海石油（中国）有限公司湛江分公司,广东,湛江,524057
3. 中海石油（中国）有限公司湛江分公司,广东,湛江,524057
- 作者简介：
[ "邓家胜（1986—）,男,硕士研究生,工程师,主要从事油气田开发领域研究。地址：克拉玛依市宝石路E座办公楼328室,邮政编码：834000。E-mail： bkqdjs@petrochina.com.cn" ]
[ "彭东宇 E-mail:bkqdjs@petrochina.com.cn" ]
- 基金信息：
DOI：10.13809/j.cnki.cn32-1825/te.2022.05.009
中图分类号： E357.7-
纸质出版：2022
- 稿件说明：
移动端阅览
邓家胜, 王子逸, 何旺达, 等. 绿泥石与CO2溶液反应实验研究[J]. 油气藏评价与开发, 2022,(5):777-783+808.
DENG Jiasheng, WANG Ziyi, HE Wangda, et al. Experimental study on reaction of chlorite with CO2 aqueous solution[J]. Petroleum Reservoir Evaluation and Development, 2022, (5): 777-783+808.
邓家胜, 王子逸, 何旺达, 等. 绿泥石与CO2溶液反应实验研究[J]. 油气藏评价与开发, 2022,(5):777-783+808. DOI： 10.13809/j.cnki.cn32-1825/te.2022.05.009.
DENG Jiasheng, WANG Ziyi, HE Wangda, et al. Experimental study on reaction of chlorite with CO2 aqueous solution[J]. Petroleum Reservoir Evaluation and Development, 2022, (5): 777-783+808. DOI： 10.13809/j.cnki.cn32-1825/te.2022.05.009.
摘要
在CO
2
与岩石反应的过程中
因岩石中含有石英、钾长石、钠长石等各种成分
各矿物间存在协同/耦合效应
一定程度上对反应进程起着促进或抑制的作用。绿泥石是沉积岩重要的黏土矿物
为明确绿泥石在CO
2
水溶液中的化学行为与变化历程
利用XRD（X射线衍射）、XRF（X射线荧光光谱）、ICP（电感耦合等离子发射光谱）、SEM（扫描电镜）等手段
系统评价了其在10 MPa、60℃条件下分别与CO
2
反应7、30 d时间内的状态
重点对比了绿泥石粉末反应前后固相元素、晶体结构及反应液中离子质量浓度变化
结合绿泥石结构特征
明确绿泥石变化的机理。结果表明
绿泥石与CO
2
反应后液相中Ca
2+
、Mg
2+
、Al
3+
等质量浓度先上升后下降;Si
4+
质量浓度先上升后趋于平稳
固相中绿泥石d（002）、d（004）峰所对应晶面在反应后遭到破坏
固相元素中Si/Al质量比由4.82升高至5.39。在酸性条件下
水镁石片中的羟基更易于H
+
结合
释放出Fe
2+
、Mg
2+
、Al
3+
等阳离子
由于水镁石八面体比硅氧四面体和铝氧八面体更易发生离子交换
水镁石片中Mg、Al、Fe等元素先于硅氧四面体和铝氧八面体中的Si、Al溶出。
Abstract
During the reaction between CO
2
and rocks
there is a synergistic/coupling effect among minerals because the rocks contain quartz
potassium feldspar
albite and other components
which promotes or inhibits the reaction process to a certain extent. The chlorite is an important clay mineral of sedimentary rocks. In order to clarify the chemical behavior and
change process of the chlorite in the CO
2
aqueous solution
the state of chlorite reacting with CO
2
respectively for 7 and 30 days at 10 MPa and 60 ℃ are systematically evaluated by means of XRD（X-Ray Diffraction）
XRF（X-Ray Fluorescence）
ICP（Inductively Coupled Plasma）
and SEM（Scanning Electron Microscopy）
focusing on the comparison of the change of the solid elements
the crystal structure and the ion concentration in the reaction solution before and after chlorite powder reaction. Combined with the structural characteristics of chlorite
the mechanism of chlorite change is clarified. The results show that the concentrations of Ca
2+
Mg
2+
and Al
3+
in the liquid phase firstly increase and then decrease after the reaction of the chlorite with CO
2
. The concentration of Si
4+
firstly increases and then is stabilized. The crystal planes corresponding to chlorite d（002） and d （004） peaks in the solid phase are destroyed after the reaction
and the mass ratio of Si and Al in the solid element increase from 4.82 to 5.39. Under the acidic conditions
hydroxyl groups in brucite flakes are easier to combine with H
+
and release cations such as Fe
2+
Mg
2+
Al
3+
etc. Because the brucite octahedron is more prone to ion exchange than silica tetrahedron and alumina octahedron
Mg
Al
Fe and other elements in brucite flakes are dissolved before Si and Al in silica tetrahedron and alumina octahedron.
关键词
Keywords
references
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