Patent application number | Description | Published |
20120156787 | Laboratory Testing Procedure to Select Acid or Proppant Fracturing Stimulation Treatment for a Given Carbonate Formation - Embodiments of the present invention enables users to determine the efficiency of acid fracturing in stimulating a formation. The testing procedures of embodiments of the present invention examine the elastic, plastic, and creeping effects on closing an acidized fracture during the life span of an oil/gas well. If it is determined that an acidized fracture will be closed for a given stress and temperature, then proppant fracturing should be used; otherwise, acid fracturing is the stimulation treatment to consider. The testing results also provide an estimation of the lifetime of an acid fracture for a given set of in-situ conditions of stress and temperature. If the lifetime is determined to be too short to make the fracturing treatment economically feasible, a different stimulation method should be considered, such as proppant fracturing or matrix acidizing. | 06-21-2012 |
20130126169 | Tight Gas Stimulation by In-Situ Nitrogen Generation - Provided is a method and composition for the in-situ generation of synthetic sweet spots in tight-gas formations. The composition can include nitrogen generating compounds, which upon activation, react to generate heat and nitrogen gas. The method of using the composition includes injecting the composition into a tight-gas formation such that upon activation, heat and nitrogen gas are generated. Upon the generation of nitrogen gas and heat within the formation, microfractures are produced within the formation and the hydrostatic pressure within the reservoir is reduced to less than the reservoir fluid pressure, such that the rate of production of hydrocarbons from the formation is increased. | 05-23-2013 |
20130126175 | Synthetic Sweet Spots in Tight Formations by Injection of Nano Encapsulated Reactants - Provided is a method and composition for the in-situ generation of synthetic sweet spots in tight-gas formations. The composition can include gas generating compounds, which upon activation, exothermically react to generate heat and gas. The method of using the composition includes injecting the composition into a tight-gas formation such that upon activation, the heat and gas are generated, resulting in the formation of fractures and microfractures within the formation. | 05-23-2013 |
20150068746 | CARBONATE BASED SLURRY FRACTURING USING SOLID ACID FOR UNCONVENTIONAL RESERVOIRS - A method of using a slurry-like fracturing fluid for hydraulic fracturing in an unconventional reservoir: injecting the slurry-like fracturing fluid into the unconventional reservoir, the slurry-like fracturing fluid comprises a particulate portion and a slurry water, the particulate portion comprises a solid acid component, injecting the slurry-like fracturing fluid is operable to generate a network of fractures, the slurry-like fracturing fluid is operable to reduce a reservoir temperature from a resting reservoir temperature, permitting the slurry-like fracturing fluid to cure into a permeable bed, allowing the reservoir temperature to return to the resting reservoir temperature to trigger the hydrolysis of the solid acid, hydrolyzing the solid acid to produce a liquid acid, and stimulating the network of fractures with the liquid acid to increase permeability of the permeable bed in the network of fractures in the unconventional reservoir, the increased permeability operable to create a sweet spot. | 03-12-2015 |