In the conditions of the producing well stock of the X field, the main sediment-forming substance is calcium carbonate in the allotropic modification represented by calcite. The prevailing method of protection used at Oil Company against this complicating factor is chemical protection. However, during implementation of this protection, failures of downhole pumping equipment occur both due to scale deposition and to other reasons, but with the presence of a significant content of calcium carbonate in solid deposits found during dismantling of underground equipment. All this indicates the insufficient effectiveness of chemical protection from the scale deposition. During the analysis of field data, laboratory and pilot field work, it was revealed that the inefficiency of the applied chemical protection technologies is due to their inoperability: the scale inhibitor did not reach the pumping equipment. The main technology that has proven its effectiveness is the technology of periodic well treatments with a scale inhibitor through the annular space of the wells with its subsequent squeezing before the pump intake with water (the volume of water for squeezing was determined experimentally) with mandatory compliance with the required frequency of treatments. The results obtained made it possible to develop and implement an effective technology for chemical protection of wells with the scale deposition as the complicating factor and to optimize it for the conditions of Oil Company.
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