Method for injecting a fluid

Abstract

A method and a device for injecting a fluid into a layer of rock or earth, such as a crude oil-containing layer of rock or earth, for example, for the tertiary crude oil production by means of a suitable line, wherein the line is introduced into the layer of rock or earth. The line consists of an inner pipe and an outer pipe. The inner pipe is provided with injection nozzles. The injection nozzles are positioned and thus ensure a pressing of the fluid into the surrounding layer of rock or earth via the openings in the outer pipe in a positioned manner. Means which allow for a selective impacting of the individual injection nozzles, are located in the interior of the inner pipe. The fluid is pressed into the surrounding layer of rock or earth in a positioned manner.

1 . A method for injecting a fluid into a crude oil-containing layer of rock or earth by means of a suitable line, wherein the line is introduced into the layer of rock or earth, characterized in that the fluid is pressed out of the line into the surroundings under pressure in a positioned manner under pressure. 
     
     
         2 . The method according to  claim 1 , characterized in that the fluid is introduced into a crude oil-containing layer of rock or earth. 
     
     
         3 . The method according to  claim 1 , characterized in that the fluid is pressed out of the line into the surroundings via an injection nozzle. 
     
     
         4 . The method according to  claim 1 , characterized in that pressing into the surroundings of the line is mainly carried out within a solid angle of 90°. 
     
     
         5 . The method according to  claim 1 , characterized in that pressing into the surroundings of the line is mainly carried out within a solid angle of 45°. 
     
     
         6 . The method according to  claim 1 , characterized in that pressing into the surroundings of the line is mainly carried out within a solid angle between 10° and 30°. 
     
     
         7 . The method according to  claim 1 , characterized in that the direction of escape of the fluid is changed chronologically 
     
     
         8 . The method according to  claim 7 , characterized in that the direction of escape of the fluid is the angle between the main axis of the line and direction of escape. 
     
     
         9 . The method according to  claim 7 , characterized in that the direction of escape of the fluid is changed step by step. 
     
     
         10 . The method according to  claim 1 , characterized in that nitrogen or carbon dioxide in gaseous state is used as fluid. 
     
     
         11 . The method according to  claim 1 , characterized in that carbon dioxide as liquid gas is used as fluid in the overcritical state. 
     
     
         12 . The method according to  claim 1 , characterized in that the direction of escape of the fluid is oriented on the structure of the rock in the surroundings. 
     
     
         13 . The method according to  claim 12 , characterized in that the direction of escape of the fluid does not deviate more than 45° from the rock structure. 
     
     
         14 . The method according to  claim 12 , characterized in that the direction of escape of the fluid is oriented parallel to the rock structure. 
     
     
         15 . The method according to  claim 2 , characterized in that the fluid is pressed in in a positioned manner via two different lines, wherein the press-in direction of the fluid of the first line encompasses an angle to the press-in direction of the fluid of the second line. 
     
     
         16 . The method according to  claim 15 , characterized in that fluid is pressed into a crude oil-containing layer of rock or earth via a first line and via a second line, wherein the second line is not located on the connecting line between the first line and the conveyor line, and the fluid is pressed out of the second line in a positioned manner such that oil, which is displaced out of the first line by means of pressing in fluid in a positioned manner, is displaced in the direction of the conveyor line. 
     
     
         17 . The method according to  claim 16 , characterized in that the angle between press-in direction of the fluid out of the first line and the connecting line between first line and conveyor line is changed in such a manner that the angle area between the connecting line of first line and conveyor line and the connecting line of first line and second line is passed successively. 
     
     
         18 . The method according to  claim 1 , characterized in that the fluid is pressed in dynamically. 
     
     
         19 . The method according to  claim 18 , characterized in that the fluid is pressed in dynamically as a pressure wave. 
     
     
         20 . A device for pressing a fluid into a layer of rock or earth, wherein the device encompasses a suitable line, which is introduced into the layer of rock or earth, characterized in that the line, in the area of the layer of rock or earth, encompasses means, which are suitable to allow the fluid to flow out of the line in a positioned manner. 
     
     
         21 . The device according to  claim 20 , characterized in that the line consists of an inner pipe and an outer pipe, wherein the inner pipe encompasses at least one injection nozzle, which is in flow-connection with the fluid, which is under pressure, and the outer pipe, at locations where injection nozzles are located on the inner pipe, is provided with openings, 
     
     
         22 . The device according to  claim 21 , characterized in that said openings are slit-shaped. 
     
     
         23 . The device according to  claim 20 , characterized in that the line encompasses openings, which are arranged only across a part of the periphery of the line. 
     
     
         24 . The device according to  claim 23 , characterized in that said openings are slit-shaped. 
     
     
         25 . The device according to  claim 20 , characterized in that the injection nozzles or the opening are located between adjacent packers.