Thermodynamic Analysis of Burial Dissolution of Carbonate Rocks and Its Geological Significance
详细信息
- 责任者：Zhang Tianfu (Hangzhou Research Institute of Petroleum Geology ; CNPC ; Hangzhou 310023 ; China) ; Bao Zhengyu
- 刊名：Xinjiang Petroleum Geology
- 出版年：2012
- 卷期：33(2)
- 关键词：碳酸盐岩储集层 ; carbonate reservoirs ; 储集空间 ; reservoir space ; 溶蚀作用 ; dissolution
- 页码：p.179-181
- 图表：1 illus., 2 tables, 13 refs.
- 分类号：1003
- issnNo：ISSN1001-3873
- isbnNo：CN65-1107/TE
摘要
Carbonate burial dissolution in nature is water-rock interaction under certain of temperature and pressure.By analyzing the Gibbs free energy (ΔG) of calcite and dolomite dissolution reaction,this paper pointed out that ΔG initially decreased and then increased with temperature increasing gradually at 25～200 ℃.The dissolution mostly occurred as temperature equaling to 115～140 ℃.At the same burial depth,dolomite is dissolved more easily than calcite.In addition,the ΔG also decreased firstly and then increased,followed by reaching to minimum at the depth of 4 300～5 000 m.