BEHAVIOR OF OILS FROM ONE OIL FIELD WHILE SELECTING ACID COMPOSITIONS FOR TERRIGENOUS RESERVOIR TREATMENTS
Most of fields currently turn to the late stage of development, connected with decline of production and physical-chemical change of hydrocarbons. The article states in terms of five wells that acidizing efficiency could be decreased by various interacting between acid and crude oils from explored wells. These interactions can result in emulsions or precipitations, which cause problems in acid and colmatants interactions. This process deteriorates in presence of iron compounds in the bottom-hole area. Iron compounds take place because of ageing well stock. Thus, based on investigations it should be observed that before acid treatment it is necessary to check acid and oil compatibility individually for each case.