SU690167A1 - Reaction agent for suppressing growth of sulphate-reducing bacteria in water-filled oil-bearing formation - Google Patents

Description

(54) REAGENT FOR THE ADDITION OF GROWTH OF SULPHATIC RESTORING BACTERIA IN A PLANTABLE OIL PLATE

The invention relates to the oil industry and the industry, in particular to the fight against sulfate reduction by bacteria that promote the formation of hydrogen sulfide in reservoirs during the development of oil fields by water flooding. There is a method for inhibiting the growth of sulfate-reducing bacteria. (SVB) by adding sodium chloride to the water being injected into the reservoir. The disadvantages of this method are the low degree of suppression of SIS and the need to use elevated concentrations of the reagent for complete inhibition of bacteria. The aim of the invention is to increase the degree of inhibition of the growth of sulfate reducing bacteria. This goal is achieved by the use of hydrofluoric ammonium hydrogen fluoride as a reagent for suppressing the growth of sulfate-reducing bacteria in a wadded oil plate. The hydrofluoric hydronium hydony is a powdery crystalline substance (NHi,) iSiFg) soluble in water. The essence of the list is as follows. . A working solution of ammonium fluorofluoride ammonium is preliminarily prepared in a container, then it is metered into the injection layer, then into the reservoir, in a concentration that is not traversed. The injection technique is selected depending on the properties of the formation. It can be carried out continuously with the addition of 0.0025-0.01 wt.% Of the reagent or periodically with the addition of a high concentration of 0.01-0.1 wt.%. . The effectiveness of the inhibition of the growth of SIS was determined by the known method for assessing the protective effect of reagents; inhibit microbiological corrosion (Ufa, VNIISPTneft, 1977). Hydrofluoric ammonium hydroxide in various concentrations was injected into the water containing sterile anaerobic steroids under various conditions and incubated for 24 hours at a temperature. Then 1 ml of liquid was taken from these samples and introduced into Postgate nutrient bottles. The bottles were thermostated for 15 days. At the same time set the control sample without the addition of reagent.

The effect of preventing the growth of bacteria was assessed by the degree of inhibition of α-UHD determined by the formula

Table continuation:

Claims (1)

, where GI and Cji are the contents of the gray type in the control and the studied BA (Mg / L), determined after 15 days from the beginning of the test. This was carried out three times over with the cultures of sulfate reducing bacteria contained in the dopast water of the oil field. ; ; The table presents the results of determining the degree of inhibition of SSC. For comparison, the results obtained under similar conditions with addition of chlorate sodium according to the known method are shown. The degree of SSC suppression,% 0.0025 0.0050 0.01 0.05 The presented data shows that the proposed method allows to significantly increase the degree of inhibition of SSC growth ,: The main advantages of the proposed method: a high degree of suppression of sulfate reducing: bacteria in the reservoir; , .-. .. expanding the range of domestic chemical products used to prevent the growth of sulfate reducing bacteria; . high manufacturability of the method; the bactericide used has good solubility in water, non-toxic, non-explosion and psezharopashen; It has a production base that will allow to organize a widespread introduction of the method in the industry. - S. ;:; ; - Isoyo-retention formula. Use of hydrofluoric ammonium hydroxide as a reagent to suppress the growth of sulfate-reducing bacteria in a wake-up oil reservoir. . . . Sources of information taken into account in the examination 1. USSR author's certificate: 449146, cl. E 21 B 43/22, 1973.