Use of natural gas for deliquification
a technology of natural gas and deliquification, which is applied in the direction of fluid removal, borehole/well accessories, earth-moving drilling and mining, etc., can solve the problems of reducing formation pressure, requiring extensive permitting and emissions monitoring, and reducing liquid volum
Inactive Publication Date: 2019-04-25
STABILIS ENERGY LLC
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Benefits of technology
The patent describes a method to produce hydrocarbons from a well that contains a lot of liquid. The method involves using liquefied natural gas (LNG) that is first regasified and then pressurized. This pressurized gas is then injected into the space between the production tubing and the surrounding well casing. The pressurized gas then flows into the production tubing and helps to remove the liquid from the well. The recovered gas and liquid are then sent for further processing. Overall, this method reduces the amount of liquid in the well and improves the overall production of hydrocarbons.
Problems solved by technology
The flow of fluids out of the formation reduces formation pressure, however, and eventually production ceases because the borehole pressure equals or exceeds the formation pressure.
These processes require extensive permitting and emissions monitoring in many locations.
Method used
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[0016]It is to be understood that the following disclosure provides many different embodiments, or examples, for implementing different features of various embodiments. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. In addition, the present disclosure may repeat reference numerals and / or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and / or configurations discussed.
[0017]Referring briefly to FIG. 2, wellbore 10 extends from the surface 12 into or through a gas-producing reservoir 14. Wellbore 10 may be lined with a casing 16. All or a portion of the annulus between wellbore 10 and casing 16 may be filled with cement 17 or other sealants such that migration of fluids through the annulus is prevented. A tubing string 20 extends thr...
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A method for producing hydrocarbons from a well that includes a borehole, production tubing in the borehole, and an annulus between the production tubing and the borehole, the borehole containing an undesirable amount of liquid, comprises the steps of: a) providing a source of liquefied natural gas (LNG), b) regasifying the LNG, c) pressurizing the regasified LNG to a pressure above the pressure in the annulus, d) injecting the pressurized regasified LNG into the annulus, e) allowing the pressurized regasified LNG to flow into and up through the production tubing; thereby reducing the amount of liquid in the borehole, f) recovering the pressurized regasified LNG along with produced gas and transmitting both.
Description
TECHNICAL FIELD / FIELD OF THE DISCLOSURE[0001]The present invention relates generally to systems and methods for fluids from a wellbore and more particularly to such systems and methods deliquefying or dewatering natural gas wells.BACKGROUND OF THE DISCLOSURE[0002]Oil and gas are produced from wells that penetrate subsurface hydrocarbon-bearing reservoirs. Such reservoirs are pressurized by the weight of the formations above the reservoir. When a well penetrates a formation, hydrocarbons and other fluids in the formation will tend to flow into the well because of the formation pressure. Formation fluids flow into the well as long as the pressure in the wellbore is less than the formation pressure. The flow of fluids out of the formation reduces formation pressure, however, and eventually production ceases because the borehole pressure equals or exceeds the formation pressure.[0003]In addition to its own produced water, a well can retain water from the fracking process or receive wate...
Claims
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IPC IPC(8): E21B43/12E21B43/16E21B43/18E21B43/40
CPCE21B43/122E21B43/168E21B43/18E21B43/40E21B43/13
Inventor KNIGHT, KOBYVOIGT, SHAWN
Owner STABILIS ENERGY LLC