Method of building underground storage for gases in soluble deposits

FIELD: gas, oil, oil refining and other industries.

SUBSTANCE: invention relates to building and operation of underground reservoir in stable rocks, for instance, soluble salt deposits. Method includes delivery of water and putting out brine along water feed and brine lifting pipes placed one inside the other, charging and storing of gas in underground reservoir. After brine lifting, reservoir is dried and then is filled up with alternating layers of absorbent and inert porous material, volume ratio 2:1, delivered along clearance between water feed and brine lifting pipes. Brine lifting pipe is perforated in lower part in height of reservoir and it is installed in lower part of reservoir. Difference between angles of repose of absorbent and inert material does not exceed 10 degrees. This done, reservoir is filled with gas delivered along perforated brine lifting pipe.

EFFECT: increased productive volume of reservoir owing to sorption of gas on surface of absorbent, reduced cost of gas storing.

1 dwg

 

The invention relates to mining, in particular to the creation and operation of underground storage tanks, created in resistant rocks, such as deposits of soluble salts, and can be used for storage of natural and industrial gases in the gas, oil, oil refining and other industries.

There is a method of storage of petroleum, petroleum products and gas condensate in the tank under the atmosphere of inert gas, according to the invention in a hydrogen sulfide and/or mercaptoacetate oil, liquid petroleum products and gas condensate in the presence of catalysts at a pressure of 0.3 to 3.0 MPa introduce compressed air from the calculation 0,06-0,12 nm31 mol of hydrogen sulfide or 2 mol of mercaptans C1-C3the solution is maintained at a temperature 10-65°for 5-180 minutes, then served in the reservoir where the fluid pressure is reduced to 0.1 to 0.6 MPa. The disadvantage of this method is the high cost of reagents and low use of the product of the volume of the tank (the Application for the invention of the Russian Federation, 2001126937/06, 7 F 17 C 11/00, 2000.03.03).

The known method of operation of underground gas storage in the sediments of soluble rocks, adopted for the prototype (Patent RF 2211179, 7 B 65 G 5/00, 2001.12.27). The method involves the injection of gas into the underground tank with simultaneous displacement of brine, storage and withdrawal of gas by lowering the pressure of the product space of the underground storage tank, according to the invention after the displacement of brine in the bottom of the reservoir under pressure to produce the injection of the composition of the binder, creating a solid phase in the volume of the residual brine. The disadvantage of this method is the low use of the product tank size.

The technical result of the invention is to increase the used product tank size.

The technical result is achieved in that in the method of creating underground storage of gases in sediments of soluble rocks, including water supply and delivery of brine on vodopada and resolutely pipes located one within the other, the injection and storage of gas in an underground reservoir according to the invention after the issuance of the brine tank drain, then the gap between vodopada and resolutely, perforated in the lower part of the height of the tank and installed in the bottom of the tubes, the tank is filled with alternating layers of absorbent and inert porous material in a volume ratio of 2:1, and the difference between the angles of repose of the absorbent and inert material does not exceed 10 degrees, after which the tank is filled by a perforated resolutely pipe gas.

The application of the method in comparison with the prototype allows to increase the used product space of the tank.

Pic is b is illustrated in the drawing, which shows a longitudinal section of the store in the sediments of soluble rocks, where

1 - russiapedia pipe;

2 - vodopada pipe;

3 - perforation in resolutely pipe;

4 - reservoir;

5 - absorbent (e.g. activated charcoal);

6 - inert porous material (e.g. clay).

The way to create underground storage of gases in sediments of soluble rocks is as follows. The tank is generated by water flow through the gap between vodopada 2 pipe and resolutely 1 pipe with one another. Brine displace on resolutely 1 pipe. After issuance of brine to produce radar measurements of the tank 4, specify its configuration and volume. Then carry out a pressure test, after which the tank 4 drain by pumping water resolutely 1 pipe. After drying rossopomodoro 1 tube lift and make the perforation 3 in its lower part by the length equal to the height of the tank 4. Then the pipe 1 is lowered until reaching the lower border of the product space of the tank 4. After that, the gap between resolutely 1 and vodopada 2 pipe carry out the filling of the tank with layers of absorbent material 5 (e.g., activated carbon), alternating with inert porous material 6 (for example, expanded clay). Inert porous mater what al 6 used to prevent caking of the adsorbent 5 and the creation of additional channels filtering the injected gas to provide the most efficient absorption of gas on the surface of the adsorbent 5. To prevent closing of the pores of the adsorbent 5 and prevent caking his layers alternate with layers of inert porous material 6, for example expanded clay. The volume ratio of absorbent to the inert material is 2:1. This ratio provides the most efficient use of the volume of the adsorbent 5, in the space of reservoir 4. The difference between the angles of repose of the adsorbent 5 and 6 inert material does not exceed 10 degrees to improve the uniformity of distribution of the adsorbent 5 and the inert porous material 6 according to the height of the tank 4. In larger difference in the angles of repose of the adsorbent 5 and the inert porous mass 6 will be a "pinch" of alternating layers height of the tank 4, which will lead to a reduction filtering of the injected gas. Used the product space of the tank 4 will increase due to the absorption of the injected gas on the adsorbent 5. After filling the tank 4 layers of absorbent 5 and an inert porous material 6 carry out the filling of the vessel 4 gas by discharge on resolutely pipe 1 through the channels of the perforation 3. The subsequent selection of the gas is carried out by lowering the pressure in the product space of the tank 4 to the pressure of a buffer gas. Gas operate on channels perforation 3 in russolophone the Noah 1 pipe.

The application of the method of creating underground storage of gases in sediments of soluble rocks provides the following benefits:

- used to increase product volume of the tank due to gas sorption on the surface of the adsorbent;

- reducing the cost of storing gas.

The way to create underground storage of gases in sediments of soluble rocks, including water supply and delivery of brine on vodopada and resolutely pipes located one within the other, the injection and storage of gas in an underground reservoir, characterized in that after the issuance of the brine tank drain, then the gap between vodopada and resolutely, perforated in the lower part of the height of the tank and installed in its lower part, the pipes, the tank fill with alternating layers of absorbent and inert porous material in a volume ratio of 2:1, and the difference between the angles of repose of the absorbent and inert material does not exceed 10°after which the tank is filled by a perforated resolutely pipe gas.



 

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