Method for the Injection of Injection Material for the Uplift of a Surface Area

Abstract

A method for the injection of injection material for the uplift of a surface area. The method includes selecting a target subterranean depth/stratum for depositing the injection material and preparing a wellbore extending from the ground surface to the target subterranean depth/stratum via utilization of a drill string. A directional drill is used for creating a horizontal wellbore, wherein a lifting routine is performed upon detection of the position of the directional drill. The lifting routine includes injecting a slurry comprising materials suspended in a carrier liquid into the injection well, lifting the surface area to a target lift elevation by depositing the injection material to the subterranean depth/stratum, resulting in an uplifting force, and measuring the rise in elevation of the surface area via surface indicators. The method achieves precise and non-disruptive elevation modification of surface areas to target levels.

Claims

1. A method for the injection of injection material for the uplift of a surface area, the method comprising: selecting a target subterranean depth/stratum for depositing the injection material; wherein the subterranean depth/stratum; preparing a wellbore extending from the ground surface to the target subterranean depth/stratum via utilization of a drill string; wherein a directional drill is used for creating a horizontal wellbore; detecting the position of the directional drill; performing a lifting routine, the lifting routine comprising: injecting a slurry comprising materials suspended in a carrier liquid into the injection well lifting the surface area to a target lift elevation by depositing the injection material to the subterranean depth/stratum resulting in an uplifting force; measuring the rise in elevation of the surface area via surface indicators.

2. The method of claim 1, wherein no horizontal movement of the surface area results from the lifting routine.

3. The method of claim 1, wherein surface infrastructure is not structurally disturbed by the lifting of the surface area.

4. The method of claim 1, wherein the uplifting of the surface area is performed without causing damage to existing surface infrastructure, such as roads, buildings, or utilities.

5. The method of claim 1, further comprising determining the desired type and concentration of materials in the slurry based on the geological characteristics of the target subterranean depth/stratum.

6. The method of claim 1, wherein the target subterranean depth/stratum is configured to retain the solids of the slurry.

7. The method of claim 1, further comprising using a control system to adjust the injection material's deposition rate based on real-time data from the surface indicators.

8. The method of claim 1, wherein the lifting routine includes periodically pausing the injection of the slurry and assessing the rise in elevation via the surface indicators.

9. The method of claim 1, further comprising: performing a second lifting routine after an initial settlement of the surface area.

10. The method of claim 1, wherein a second target subterranean depth/stratum is selected.

11. The method of claim 1, further comprising detecting the deformation of the surface in real time.

12. The method of claim 1, further comprising calculating the injection material's volume required to achieve the target lift elevation based on the detected position of the directional drill and geological data.

13. The method of claim 1, further comprising sealing the wellbore upon completion of the injection process to prevent contamination of surrounding strata.

14. The method of claim 1, wherein a target lift comprises a raise of elevation of more than six inches.

15. The method of claim 1, wherein the slurry forms a new stratum.

16. The method of claim 1, wherein the slurry is selected for uplift and stability, the slurry comprises fine material selected from the group consisting of gypsum and/or clay.

17. The method of claim 1, wherein the injection material is deposited at a pressure and flow rate determined based on the geological characteristics of the stratum and the desired lift elevation.

18. The method of claim 1, wherein the surface indicators comprise at least one of global positioning system (GPS) data, laser distance measurements, or tilt sensors.

19. The method of claim 1, wherein the surface indicators are configured to provide real-time data that can be used for predictive modeling of surface uplift and its impact on flood prevention.

Description

BRIEF DESCRIPTIONS OF THE DRAWINGS

[0015] Although the characteristic features of this invention will be particularly pointed out in the claims, the invention itself and manner in which it may be made and used may be better understood after a review of the following description, taken in connection with the accompanying drawings wherein like numeral annotations are provided throughout.

[0016] FIG. 1 shows a cross-sectional schematic view of a surface with drilling and injection equipment and an underground with a wellbore and a directional drill in a target stratum.

[0017] FIG. 2 shows a flow chart of an embodiment of the method for the injection of injection material to uplift a surface area.

DETAILED DESCRIPTION OF THE INVENTION

[0018] Reference is made herein to the attached drawings. Like reference numerals are used throughout the drawings to depict like or similar elements of the system. For the purpose of presenting a brief and clear description of the present invention, the embodiment discussed will be used for the injection of injection material to uplift a surface area. The figures are intended for representative purposes only and should not be considered to be limiting in any respect. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments.

[0019] Reference will now be made in detail to the exemplary embodiment(s) of the invention. References to one embodiment, at least one embodiment, an embodiment, one example, an example, for example, and so on indicate that the embodiment(s) or example(s) may include a feature, structure, characteristic, property, element, or limitation but that not every embodiment or example necessarily includes that feature, structure, characteristic, property, element, or limitation. Further, repeated use of the phrase in an embodiment, first embodiment, second embodiment, or third embodiment does not necessarily refer to the same embodiment.

[0020] Referring now to FIG. 1, there is shown a cross-sectional schematic view of a surface with drilling and injection equipment and an underground with a wellbore and a directional drill in a target stratum. In one method of the present invention, the method for the injection of injection material for the uplift of a surface area provides a solution to uplift the ground. The method utilizes some drilling tools (i.e., drill strings) and techniques (i.e., directional drilling) to pump an injection material 2700 (i.e., slurry or mud) in low-lying coastal regions prone to hurricane-induced surge. The injection of the injection material to a target stratum, provided the proper injection material and target stratum are selected, causes the surface to uplift.

[0021] In the shown embodiment, a drill string 2000 is positioned within a wellbore 3000 and drilled to a desired depth. In one embodiment, the wellbore is formed by the drill string 2000, wherein the drill string 2000 comprises a plurality of interconnected drill pipes and other components that are used to create a well bore during drilling operations. A pump truck 2200 includes or is otherwise in operation with an injection control system. The injection control system injects fluid into the subterranean region through the wellbore 3000. The shown well 3000 comprises a substantially full-length concrete production casing and a cemented surface casing. In some embodiments, the well 3000 is similar to a conventional oil well. During drilling, a high rate of mud circulation is employed. A low shrinkage, pliable and expandable cement is used for cementing the well, in order that the repeated and sequential applications of pressure during the lifting routine does not fracture or crack the concrete layer.

[0022] The method comprises the injection of fine materials into a targeted subterranean stratum 2400 to uplift a surface area 2500, ultimately raising it to a predetermined elevation that mitigates flood risks. Initially, a specific subterranean depth or stratum within the Earth's crust is tested to determine the geological profile and a target stratum is strategically chosen based on those geological characteristics. This ensures optimal suitability for the injection of materials that will subsequently raise the surface elevation. These geological characteristics include, but are not limited to, the permeability of the stratum, the composition of the stratum, the depth, the stability, and the compatibility with the slurry.

[0023] In one embodiment of the method, when the target stratum is reached directional drilling equipment 2600 is employed to control the path of the wellbore, allowing for horizontal drilling. Directional drilling is adapted to precisely position the wellbore in the stratum within a certain radius from the wellbore without requiring additional wellbores to be drilled.

[0024] In one embodiment, an open-bottom injection tubing string is lowered into the wellbore. During installation of the tubing string, a hole-bottom electronic pressure gauge is installed to measure pressure of the fluid within the tubing near the bottom of the hole. The gauge is employed to measure fluid pressure of the slurry during and after the injection. In one embodiment, the injection material is deposited at a pressure and flow rate determined based on the geological characteristics of the stratum and the desired lift elevation. In another embodiment, there exists a relationship between the flow rate and applied pressure of the slurry throughout the injection process. Typically, the flow rate is inversely proportional to the applied pressure. In scenarios where a higher burden, such as a greater depth or tougher strata requiring fracturing, is encountered, a higher pressure may be necessary to produce the desired lift. Conversely, in more porous or previously fractured formations, a lower pressure with a larger flow rate may be applied. The specific pressure and flow rate are determined in each individual case. This flexibility ensures that the method be tailored to diverse geological conditions, optimizing its effectiveness across a range of scenarios.

[0025] The slurry may be formed either in advance and trucked to the site in the pumping truck or prepared on site. The composition and density of the slurry is monitored to ensure that it meets desired specifications. Prior to slurry injection, tests may be run to assess the formation flow behavior (formation permeability and transmissivity) and the formation geomechanical behavior (compressibility, fracture behavior, stress state). In one embodiment, the method further comprises determining the appropriate type and concentration of materials in the slurry based on the geological characteristics of the target subterranean depth/stratum, wherein the target subterranean depth/stratum is configured to retain the solids of the slurry.

[0026] In one embodiment, the slurry is injected into the well in a series of one or more injection lifting routines/processes/episodes of between about 3-10 hours each. The injection pressure of the slurry is sufficient to overcome the parting pressure of the formation, whereby the suspended solid particles of the slurry remain in or adjacent to the target stratum. In one embodiment, the slurry forms a new stratum. The individual lifting episodes are separated by periods of between 10 and 100 hours depending on the response of the stratum. The injection well and the region surrounding the well are monitored by means of surface and subsurface techniques to optimize injectivity and to track formation response to the injected slurry. In one embodiment, the method comprises performing a second lifting routine after an initial settlement of the surface area. The second episode may occur in the same or different target stratum.

[0027] In one embodiment, several monitoring tools are used in addition to surface deformation measurement to assess the response to the injection. The surface uplift data allow discrimination between vertical and horizontal fracture orientations by virtue of the magnitude and direction of the tilt vectors from an array of tiltmeters positioned around the injection well and the surface. This indicates whether vertical or horizontal material transport away from the wellbore may be occurring. In one embodiment, the method comprises detecting the deformation of the surface in real time. The slurry is selected for uplift and stability, and may comprises fine material, gypsum and/or clay. The fine materials used may vary from clay, to sand or other type of material in a small granular form that will remain suspended in the slurry while maintained in a turbulent flow condition. In one embodiment, the surface indicators may comprise at least one of global positioning system (GPS) data, laser distance measurements, or tilt sensors.

[0028] In one embodiment, there is no horizontal movement of the surface area resulting from the lifting routine. The surface infrastructure is not structurally disturbed by the lifting of the surface area. The uplifting of the surface area is performed without causing damage to existing surface infrastructure, such as roads, buildings, or utilities. In one embodiment, the method utilizes a control system to adjust the injection material's deposition rate based on real-time data from the surface indicators.

[0029] Referring now to FIG. 2, there is shown a flow chart of an embodiment of the method for the injection of injection material to uplift a surface area. In the shown embodiment, there is shown a series of steps of the method used to uplift the surface area. Initially, an area that may benefit from uplift is identified by factors such as flood risk mitigation or elevation enhancement and selected 5000. After one or more locations are selected as possible areas to that are desirable to uplift, testing begins to select a target subterranean depth/stratum for depositing the injection material. The geological characteristics and analysis identify the most suitable stratum for receiving the injection material.

[0030] Once the target stratum is identified, the wellbore is prepared 5100. In some embodiments, a new wellbore is drilled which extends from the ground surface to the chosen subterranean depth or stratum. A drill string is used to achieve this and the employment of directional drilling tools to ensure precise wellbore alignment. In other embodiments, a wellbore is already drilled. The wellbore may need treatment or other structures to ensure structural integrity. In one embodiment, as the wellbore is being prepared, the position of the directional drill is monitored in real time. The real-time data gathering ensures the accurate alignment of the wellbore with the target subterranean depth or stratum 5200.

[0031] In the shown embodiment, lifting routine is executed to lift the target area 5300. A slurry composed of materials suspended in a carrier liquid is introduced into the wellbore 5400, ultimately reaching the target subterranean depth or stratum. The selection of slurry materials and the precise composition of the slurry are selected based on the specific characteristics of each uplift. The target surface area is lifted 5500 by the injection into the subterranean depth or stratum results in the generation of an uplifting force. This force effectively raises the surface area to the predetermined target elevation. Throughout the lifting routine, the drilling operation is continuously monitored 5600. This includes monitoring both surface and subsurface techniques, which are vital for keeping a close watch on the injection well and the region surrounding it. This monitoring includes the measurement of pressure, the assessment of formation response to the injected materials, and the real-time collection of data. Surface indicators play a vital role in this phase, constantly measuring the rise in elevation of the surface area.

[0032] In the shown embodiment, the injection process is divided into a series of one or more lifting routines or episodes 5700. The precise duration of these intervals is contingent on the observed response of the stratum.

[0033] It is therefore submitted that the instant invention has been shown and described in what is considered to be the most practical and preferred embodiments. It is recognized, however, that departures may be made within the scope of the invention and that obvious modifications will occur to a person skilled in the art. With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention.

[0034] Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.