|
|
|
Mechanisms and experimental research of ion-matched waterflooding to enhance oil recovery in carbonate reservoirs: A case of Cretaceous limestone reservoirs in Halfaya Oilfield, Middle East
|
|
PENG Yingfeng,LI Yiqiang,ZHU Guangya,PAN Deng,XU Shanzhi,WANG Xiuyu
|
|
| |
Table 4 Ion composition of injection water and water source of Mishrif carbonate formation in Halfaya oilfield.
|
|
| Water source | Na+/(mg?L-1) | K+/(mg?L-1) | Ca2+/(mg?L-1) | Mg2+/(mg?L-1) | Cl-/(mg?L-1) | SO42-/(mg?L-1) | TDS/(mg?L-1) | IS/(mol?L-1) | | River water | 260 | 4 | 151 | 70 | 390 | 527 | 1573 | 0.04 | | Seawater | 14 071 | 0 | 880 | 1 391 | 2 4377 | 3 217 | 43 959 | 0.88 | | Formation water | 60 369 | 1 707 | 8 000 | 1 944 | 114 488 | 360 | 18 7 817 | 3.53 |
|
|
|