|
|
|
Water-sensitive damage mechanism and the injection water source optimization of low permeability sandy conglomerate reservoirs
|
|
WANG Lei,ZHANG Hui,PENG Xiaodong,WANG Panrong,ZHAO Nan,CHU Shasha,WANG Xinguang,KONG Linghui
|
|
| |
Table 4 Changes of clay mineral contents before and after water flooding.
|
|
No. of
Core # | Experiment status | Clay mineral
content/% | Proportion of clay minerals/% | Interlayer ratio of illite and montmorillonite mixed layer/% |
|---|
Illite and montmorillonite
mixed layer | Illite | Kaolinite | Chlorite |
|---|
| 3 | Before water flooding | 6.5 | 12 | 57 | 27 | 4 | 15 | | After water flooding | 6.2 | 14 | 55 | 31 | 0 | 15 | | 4 | Before water flooding | 4.4 | 13 | 41 | 46 | 0 | 10 | | After water flooding | 4.3 | 18 | 57 | 21 | 4 | 10 | | 5 | Before water flooding | 8.1 | 13 | 51 | 36 | 0 | 15 | | After water flooding | 7.1 | 13 | 41 | 46 | 0 | 15 | | 6 | Before water flooding | 9.5 | 15 | 31 | 47 | 7 | 15 | | After water flooding | 8.9 | 13 | 51 | 36 | 0 | 15 |
|
|
|