| PDF: | |
| Time: | 2016 |
| Journal: | GLOBAL GEOLOGY |
| Volumn: | 35 |
| Issue: | 1 |
| Pages: | 235-243 |
| Type: | Other |
| Author: | Kaikai Yang,Weihua Bian,Yangyang Jiao,Xuhong Zhou,Chenchen Xu,Zhongqiong Lu |
Abstract: | Abstract: Based on the basalt cores of 305. 79 m long，176 rock slides and their corresponding logging data of 45 wells in the eastern depression of Liaohe Basin，the basalts are divided into the massive，vesicular and brecciated basalts in category． The massive basalt is dense and massive，underwent a low degree of alteration，and its logging is characterized by high density ( in average of 2.71g.cm-3 ) and low natural gamma ( in average of 36 API) ． The vesicular basalt is developed in vesicles，mostly filled with zeolite and calcite，underwent the most serious alteration，and its logging is characterized by low density ( in average of 2.47g·cm－3) and high acoustic time( in average of 72μs.ft-1) ． The brecciated basalt is in autobrecciated form，developed in inter-breccia spaces，and its logging is characterized by low resistivity ( in average of 8 Ω.m) ． The mechanisms of well-logging response of the basalts depend on mineral composition，structure，alteration type and degree，reservoir space and later modification，and hydrocarbon saturation，etc． |