APPLICATION OF ACIDIZING AND AUGMENTED INJECTION TECHNOLOGY TO INJECTION WELLS IN LOW-PERMEABILITY RESERVOIR OF BINNAN OIL FIELD

A systematical experimental method of acid treatment for increasing injection of injection wells and well stimulation in the low permeability reservoir of Binnan oil field was proposed. The reservoir performance before acid treatment, the formation damage resulted from injection of polluted water and acidization for many times, as well as the selection principles for different types of acids were discussed. The simulation experiments on the long core flow were carried out. The acidizing parameters on the spot were optimized and evaluated. The practice demonstrated that the acid system obtained from the laboratory test and the parameters adopted on the oil field are suitable for removing plugging and increase the injection of water in the low permeability wells. This method can be generalized in the water injection wells with low\|permeability.