Burial Karst Characteristics and Preliminary Estimates of Ordovician Carbonate Reservoirs in Central Area of ml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />me w:st="on">Tarimme> Basin
m 0cm 0pt" class=MsoNormal>Various types of karstification effects have developed in the Ordovician carbonate reservoirs of the central ml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />me w:st="on">Tarimme> Basin. Analyses of well cores, logging data and geological background have indicated that, there are mainly 4 stages of burial Karstification effects in the area. The pores in stages mso-bidi-font-family: 宋体">Ⅰand mso-bidi-font-family: 宋体">Ⅱ have been filled. The residual pores in stage mso-bidi-font-family: 宋体">Ⅲ and the corrosion pores in stage IV work as effective reservoir space for present reservoirs. The main fluid medium includes organic acid and CO2 generated during organic evolution. The influence and evaluation still require further research. Preliminary analysis shows burial karstification pores is development in northwest of centra1 me w:st="on">Tarimme> Basin, the next one is platform margin in south of centra1 me w:st="on">Tarimme> Basin.