SU829874A1 - Plugging composition - Google Patents

Description

(54) MIXING SOLUTION

The invention relates to plugging solutions for cementing wells, mine workings, trenches, and can be explored in the oil and gas industry and in the oil and gas industry. Cementing solutions containing organic surface-active substances (surfactants), plasticizers, ammonium acid, lignosulphonate, alkylsulphates, etc. are known. 1. The most similar in composition and achieved technological effect to the proposed solution is the bulk solution containing 1% by weight of cement O , 5–5% silica additive with a particle size of 0.1–4, .4 mm, 0.1–2% of the retention agent for setting time, for example, Eliyl lignosulfur (daata (PRS, CSSC, SDB) and 27–115% vetil 2 However, these technical solutions are slow and low cement stone strength. When cementing wells with a low temperature CTBtsJia, one often observes water production and flow1 AND fluids both during the RPF and after the development of wells, which limits the area of its application and Bath water, as a rule, leads to systematic complications in the course of operation. The purpose of the invention is to improve the quality of the solution by increasing its strength properties while reducing the time required for seizure. This goal is achieved by the fact that as a setting time setting controller, the cement slurry contains a raanoradical bi-quaternary ammonium salt of RBSA of the following structure UCH3) - N- (CH2) N- (CH3V1 ICH OOR CHoCOOR J where the T radicals alternate between C9H groups. HE,

In the following ratio of components, eu.%:

Cement 61.30-65.30

Siliceous

or carbonate

additive1.30-5.30

Versatile

bi-quaternary salt

ammonium 0.07-0.11

Water Else IQ

 RBSA is a non-toxic powder, can be produced in the form of a powder or paste, is well soluble in water at normal temperature, is synthesized and manufactured at the pilot plant of the Institute of Organic Chemistry of the Academy of Sciences of the Ukrainian SSR. The cost of RBSA is lower than the cost of the basis of the mass of plasticizer reagents used in the petroleum industry,

As silica additives of ZO, additives of diatomite, natural zeolite of the Transcarpathian deposit and carbonate additive, representing waste from cutting the shell rock on the Uzen quarry of the Mangyshlak island, are used. The particle size of the milled additives used is 0.1-1.0 mm. For the preparation of the cement slurry, the grouting Portland cement of the Novotroitsk Cement Plant 30 cement plant is used.

Example 1. In 1000CM of water, 2.83 g of RBSA is dissolved, then 666 g of diatomaceous earth is added and mixed with 2158 g of cement. The resulting cement-mortar and stone have the following properties:

flowability 22 cm, specific gravity 1.78 g / cm, static shear stress 14 dm / cm, dynamic shear stress - 40 shear 180 dn / cm, least plasticity 12 P, least Bingham viscosity 3 P, permeability through 2 0.12 days, the beginning of setting at a temperature of 22 ° C, 00 minutes, the end of setting, 8 hours and 15 minutes, the bending strength after 2 and 7 days, respectively, 30 and 75 kg / cm, the beginning

about

setting at 75 ° C. 2 h Yu min, end - 2. h 55 min, other-. 50 ness. for bending after 2 and 7 days, respectively, 68 and 77 kg / cm.

Example 2. In 1OOO cm of water, 2.00 g of RBSA is dissolved, then 177 g of zeolite is added and mixed with 55 2065 g of cement. The resulting cement slurry and stone have the following properties:

flowability 22 cm, specific weight 1.77 g / cm, static shear stress 11 dn / cm, dynamic shear stress 15O dn / cm least plasticity 1O P, least Bingham viscosity 2 P, permeability after 2 days 0, 06, the beginning of the setting at a temperature of 22 C 6 h 20 min, the end of the setting 7 h 35 min, the bending strength after 2 and 7 days, respectively, 30 and 73 kg / cm, the beginning of the hardening at a temperature of 75 C 2 h 00 min, the end of the hardening 3 h OO min, bending strength after 2 and 7 days, respectively, 63 and 65 kg / cm.

Example 3. In 1OOO cm of water, 3.33 g of RBSA is dissolved, then BUT of g of the carbonate additive is added and mixed with 2113 g of cement. The resulting cement slurry and stone have the following properties:

flowability 22 cm, specific gravity 1.78 g / cm, static shear stress 12 dn / cm, dynamic shear stress 16O d / cm, least plasticity 11 P, least Bingham viscosity 2 P, permeability 0.08, the beginning of the setting at a temperature of 22 C 7 h 15 min, the end of the setting at a temperature of 22 C 8 h 20 min, bending strength after 2 and 7 days, respectively, 27 and 65 kg / s, the beginning of the setting at a temperature of 75

2 h 10 min, the end of the seizure

3 h 15 min, bending strength through

2 and 7 days, respectively, 62 and / 73 kg / s. Based on the research, it can be concluded that the cement slurry containing RBSA, unlike the known solution, has accelerated setting times at a temperature of 22 and up to 45% and an increase of 5% in strength. cement stone stored pro. temperature of 2 ° C and 15-39% stored at a temperature of 75 ° C, while the flowability and rheological characteristics of the proposed cement slurry remain similar to those of the prototype solution.

Claims (2)

In addition, the proposed cement slurry has not only high early strengths and low permeability of a 2-day stone, but also retains its physicomechanical properties after 6 and 12 months of solidification in both fresh water and electrolyte solutions, including in g / l: NaCe - 27.2. Aldse 3.8, NaSQ.1, 7., Ca 504 - 1.2. Experimental-industrial tests of the composition, tested at the Ueenskoye oil field, fully confirm the data obtained in the laboratory and show the technological perspective of the development of the application. The presence of good rheological characteristics, as well as the application of the known solution, reduces the hydraulic resistance when the cement slurry is pushed into the annular space of the well and rises to the mouth, and in contrast to the known composition, quick setting of the cement slurry is achieved under conditions of the well, which prevents water and gas supply during the RPF, as well as due to the high strength of the stone, the well is operated for a long time without delay in repair and insulation works. Claims Cement slurry containing cement, silica or carbonate filler, setting time regulator and water, characterized in that in order to improve the quality of the solution by increasing its strength properties while reducing the setting time, the solution contains mixed radical bictertum ammonium salt, of the following general formula CCH,) j-Ni- (CH,), (CH3) J2ceCHjCOOR CHjCOORj where R -, CgH ,, ,, ,, Qj, in the following ratio of ingredients, in wt.%: Cement 61.3 -65.3 Silica and whether carbonate filler1,3-5,3 Bi-Quaternary multiradical ammonium salt 0.07-0.11 Water. The rest Sources of information taken into consideration in the examination 1. Danyushevsky V. S. and others. Reference guide to the grouting materials. M., Nedra, 1973, p. 139. 2. US patent M 2558335, i. cl. 106-9O, publ. 1971 (prototype).