SU1640366A1 - Grouting mortar - Google Patents

Description

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(21) 4608129/03

(22) 11/23/88

(46) 04/07/1, Kyul. F 13

(71) Bashkir State Research and Design Institute of the Petroleum Industry

(72) F.M. Valiakhmetov, N.Ya.Semenov and V.M. Morozova

(53) 622.245.42 (088.8)

(56) USSR Author's Certificate No. 1263814, cl. K 21 V 33/128 1985.

Bulatov A.I. and others. Tampon materials. M .: Nedra, 1987, p. 216-219.

(54) MIXING SOLUTION

(57) The invention relates to the construction of wells. The goal is to shorten the setting time and harden. The solution contains the following components in their ratio, May,%:. grouting Portland cement 64.5- 71.4, oil preparation waste the rest. The waste is an aqueous solution of salts, it has a density of 1200 kg / m3. The cement slurry is prepared by mixing portland cement in an oil treatment waste. The use of the solution allows to adjust the setting time by changing the W / C. 2 tab.

3

The invention relates to the petroleum industry and is intended for use in the attachment of wells and the elimination of the absorption of washing fluid, water flow and rock falls.

The purpose of the invention is to reduce the duration of the setting and hardening of the cement slurry,

Cement slurry contains cement-bearing portland cement and saline shutter fluid, and oil preparation preparation is used as the setting fluid and accelerator in the following ratio, wt.%: Cement portland cement64- 5-71.4 Oil preparation waste Remaining Oil preparation waste represents is a light yellow liquid with a density of 1200 kg / me and pH 4, which contains no more than 30 mg / l of suspended matter and 30-50 mg / l of petroleum products.

Table 1 shows the chemical composition of the waste oil preparation.

Example of preparation of cement slurry.

Take 250 g of waste oil treatment and shut off 500 g of cement-bearing portland cement of mark 500. The obtained cement slurry has a flowability of 18 cm, the beginning of setting is 33 minutes, the end of setting is 1 hour and 22 minutes.

Table 2 shows the properties of tampon solutions and cement stone.

As can be seen from Table 2, the oil treatment waste acts as an effective accelerator for setting the cement oil Portland cement and can be used for cementing absorbing and water-conducting formations (soy

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1), cementing the zones of collapses and casing strings when attaching wells (compositions 2-4). Waste oil preparation is a more effective accelerator for setting cement mortar when cementing absorbing and water-bearing formations, than calcium chloride widely used for these purposes. The backfill composition is also more preferable from the point of view of long-length casing string cementing when stretched dates of the beginning of the seizure and the shortest possible time (composition 2-4) of the end of the seizure.

The use as a mixing fluid of an oil treatment preparation allows adjustment of the setting time over a wide range by changing the water-cement ratio. With

Note, S (- total oonrpwtiiiup chloride and sodium sulfate and sodium;

LA - total 1 content of chloride and sush.fatop calcine and magnesium;

Ar is the total content of carbonates and bicarbonate on calcium and magnesium.

Claims (1)

This simplifies the procedure for preparing the solution, since the finished brine is used, as well as environmentally hazardous waste. Invention Formula Cement slurry, including backfill Portland cement and mineralized sealing fluid, characterized in that, in order to reduce the setting time and hardening, it contains mineral waste oil as a mineralized mixing fluid in the following ratio, wt.%: Cement Portland cement64, 5-71.4 Oil treatment waste Else Table 1 T a b .1 and c and 2