The Development Features and Controlling Factors of Reservoirs of Sinian Dengying Formation in Central Guizhou Uplift and Its Adjacent Areas

详细信息   

• 责任者：Cao Jianwen (Karst Dynamics Laboratory ; Institute of Karst Geology ; CAGS ; MLR ＆ GZAR ; Guilin 541004 ; China) ; Liang Bin
• 刊名：Geological Bulletin of China
• 出版年：2012
• 卷期：31(11)
• 关键词：古岩溶 ; paleokarst ; 碳酸盐岩储集层 ; carbonate reservoirs ; 贵州 ; Guizhou Province
• 页码：p.1902-1909
• 图表：3 illus., 2 tables, 17 refs.
• 分类号：1003
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

摘要

Upper Sinian Dengying Formation in central Guizhou uplift and its adjacent areas experienced the Tongwan movement at the end of Sinian Period, which resulted in the karstification of the paleo-weathering crust. A lot of reservoir space was formed in this period. This paper analyzed the genesis of the reservoir space on the basis of investigating such controtling factors as rock characteristics, sedimentary facies, dolomite and structure by means of testing samples, analyzing flakes and conducting field work. Although both porosity and permeability of Derlgying Formation are low, the porosity of alga dolomite formed under the strong water dynamic condition remains relatively high. In addition, the dolomitization effect increased the porosity of rocks. As a result, the solubility of rocks became higher. The sedimentation hiatus caused the leaching of rocks by atmosphere water, accompanied by the formation of some reservoir space. In conclusion, the formation condition of Dengying Formation paleo-karst reservoirs was very favorable in the study area. The central Guizhou uplift and its adjacent areas will become very important places for the exploration of petroleum resources in South China.