System and methods for treating subsurface formations containing fractures

a technology of subsurface formations and fractures, applied in the direction of fluid removal, survey, borehole/well accessories, etc., can solve the problems of high production and injection of fluids from such reservoirs, difficult hydrocarbon recovery from low permeability subterranean formations, and similar problems, and achieve the effect of increasing the size of microfractures

Inactive Publication Date: 2015-03-19
BOARD OF RGT THE UNIV OF TEXAS SYST
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Problems solved by technology

Recovery of hydrocarbons from low permeability subterranean formations is difficult because of the low mobility of fluids in the pore space in the subterranean formation (ultra-low permeability rocks).
This makes the production and injection of fluids from such reservoirs very difficult.
Similar problems are encountered in heavy oil reservoirs (reservoirs containing crude oil with a viscosity larger than about 100 centipoise).
Here too, the mobility of the fluids is small and it is difficult to inject and produce from the hydrocarbon bearing rock.

Method used

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  • System and methods for treating subsurface formations containing fractures
  • System and methods for treating subsurface formations containing fractures
  • System and methods for treating subsurface formations containing fractures

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Embodiment Construction

[0029]The following description generally relates to systems and methods for treating hydrocarbons in the formations. Such formations may be treated to yield hydrocarbon products and other products.

[0030]“API gravity” refers to API gravity at 15.5° C. (60° F.). API gravity is as determined by ASTM Method D6822 or ASTM Method D1298.

[0031]“Acid” refers to any inorganic or organic fluid that ionizes to provide high concentrations of protons (low pH) in solution with water. Examples of acids include hydrochloric acid, acetic acid, formic acid, hydrofluoric acid, and fluoboric acid.

[0032]A “fluid” may be, but is not limited to, a gas, a liquid, an emulsion, a slurry, and / or a stream of solid particles that has flow characteristics similar to liquid flow.

[0033]A “formation” includes one or more hydrocarbon containing layers, one or more non-hydrocarbon layers, an overburden, and / or an underburden. “Hydrocarbon layers” refer to layers in the formation that contain hydrocarbons. The hydroca...

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Abstract

Methods of treating hydrocarbon containing formations are described herein. A method for treating a mudstone formation includes providing a substantially horizontal or inclined wellbore to mudstone formation; providing acid to the portion of mudstone formation such that a size of the fractures is increased; and allowing hydrocarbons to flow through the fractures.

Description

BACKGROUND[0001]1. Field of the Invention[0002]The present invention relates generally to methods and systems for production of hydrocarbons and / or other products from various subsurface formations such as hydrocarbon containing formations containing fractures.[0003]2. Description of Related Art[0004]Hydrocarbons obtained from subterranean formations are often used as energy resources, as feedstocks, and as consumer products. Concerns over depletion of available hydrocarbon resources and concerns over declining overall quality of produced hydrocarbons have led to development of processes for recovery that is more efficient, processing and / or use of available hydrocarbon resources. In situ processes may be used to remove hydrocarbon materials from subterranean formations that were previously inaccessible and / or too expensive to extract using available methods.[0005]Substantial reserves of hydrocarbons are known to exist in formations that have relatively low permeability. Examples of...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B43/26E21B43/267
CPCE21B43/267E21B43/26E21B43/27E21B43/283
Inventor SHARMA, MUKUL MANI
Owner BOARD OF RGT THE UNIV OF TEXAS SYST
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