Micro paraffin inhibitor used for high-temperature high-salt oil well and preparation method thereof

Abstract

The invention relates to a micro paraffin inhibitor used for a high-temperature high-salt oil well and a preparation method thereof. The microbe antiwax remover comprises the following components in percentage by weight: 15.0%-25.0% of industrial salt; 4.0%-8.0% of inorganic ammonium salt; 2.0%-4.0% of inorganic phosphorus salt; 10.0%-20.0% of starch; 5.0%-15.0% of bacillus strains and the balance of water. The raw materials and water are added into a fermentation tank with stirring, temperature control and vacuum systems according to a certain proportion, are uniformly stirred, heated to 121 DEG C for sterilization for 30 minutes, then slowly cooled to 95 DEG C, the bacillus strains are added into the fermentation tank according to proportion, then the temperature is reduced to 55-60 DEG C, and heating is stopped after 48 hours of fermentation; and the mixture in the fermentation tank is cooled to a normal temperature when being stirred so as to obtain the needed microbe antiwax remover. The microbe antiwax remover disclosed by the invention can effectively control the wax precipitation of the high-temperature high-salt oil well, and has strong reliability in use, a good effect and high economic benefits.

Description

Technical field: [0001] The invention relates to a microbial wax removing and preventing agent for high-temperature and high-salt oil wells and a preparation method thereof, which belongs to the technical field of oil field chemical agents in the petroleum industry. Background technique: [0002] In the process of oil exploitation, as the wellbore temperature and pressure drop, the waxy components in crude oil will often precipitate, grow and deposit in the tubing, and then form oil well wax deposits, seriously affecting the normal production of oil wells. Therefore, effective measures must be taken to control oil well wax deposition. [0003] At present, the methods for controlling wax deposition in oil wells mainly include physical methods, chemical methods and microbial methods. However, the physical method (mainly including hot washing and mechanical wax scraping) has the disadvantages of high cost and great damage to the formation; the chemical method (mainly including...

AI Technical Summary

Problems solved by technology

However, for the problem of wax formation in oil wells with high temperature (above 90°C) and high salinity (above 15% salinity), conventional microbial methods cannot effectively solve the wax removal effect, which is far from meeting the actual production requirements of oilfields.