Simulation Experiment for the Dissolution of Carbonate Rocks of the Yingshan Formation on the Northern Slope of Tazhong Uplift

详细信息   

• 责任者：She Min (Hangzhou Institute of Geology ; PetroChina ; Hangzhou 310023 ; China) ; Zhu Yin
• 刊名：Carsologica Sinica
• 出版年：2012
• 卷期：31(3)
• 关键词：碳酸盐岩 ; carbonate rocks ; 溶蚀作用 ; dissolution ; 储集空间 ; reservoir space ; 塔里木盆地 ; Tarim Basin
• 页码：p.234-239
• 图表：3 illus., 3 tables, 8 refs.
• 分类号：1003
• issnNo：ISSN1001-4810
• isbnNo：CN45-1157/P

摘要

Dissolution experiment and microscopic observation are carried out to research micro-corrosion mechanism of carbonate rocks. The corrosion process and micro features of three types of carbonate rocks in the Yingshan Formation on the northern slope of Tazhong uplift are studied in this paper. The results show that the dissolution quantities of three kinds of carbonate rocks, sparry bioclastic limestone, dolomitic limestone and mud-crystal grain limestone, are almost the same. Because of the selective dissolution for composition and microstructure of rocks, micro-corrosion characteristics of these three kinds of carbonate rocks are significantly different. The surface of sparry bioclastic limestone and mud-crystal grain limestone are overall reduced by corrosion. The calcites of dolomitic limestone are eroded and lowered to form mould pores. The dolomites of dolomitic limestone are eroded into honeycomb-like pores that protruding on the rock surface. The inter-crystal fractures of dolomite are enlarged by dissolution and become interconnected. That is of important significance for reservoir and permeability of oil, gas and groundwater.