Integrated methods for reducing formation breakdown pressures to enhance petroleum recovery
AssigneeSaudi Arabian Oil Company
InventorsMisfer Almarri, Waheed Syed Arshad, Adel Ali Al-Qahtani
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Abstract
A method of increasing hydrocarbon recovery from a wellbore in a tight formation with greater breakdown pressures, the method including using hydro-jetting to effect a plurality of oriented cavities or discoidal grooves in the horizontal portion of the wellbore to overcome near-wellbore stresses, injecting a thermally controlled fluid into the wellbore to alter the temperature of the formation and lower stresses, and then fracturing the formation to generate a series of fractures that can be formed in a planar formation.
Claims12
A method of increasing hydrocarbon recovery from a tight hydrocarbon formation, the method comprising the steps of:
- injecting a hydro-jetting fluid into a wellbore, wherein the wellbore is formed within a tight gas reservoir formation with a vertical portion and a horizontal portion, the horizontal portion having a wellbore diameter, and wherein the hydro-jetting fluid comprises a mixture of an abrasive material and water;
- directing the hydro-jetting fluid through a downhole tool at a pressure greater than 2000 psi to effect hydro-jetting inside the horizontal portion of the wellbore;
- creating a plurality of oriented cavities substantially perpendicular to the horizontal portion of the wellbore via hydro-jetting, wherein the oriented cavities extend radially outward from the horizontal portion of the wellbore distance equal to or greater than one and a half times the wellbore diameter;
- injecting a thermally controlled fluid into the wellbore, wherein the temperature of the thermally controlled fluid is selected to alter the temperature of the tight gas reservoir formation;
- and
- fracturing the tight gas reservoir formation by generating a plurality of planar fractures.
A method of increasing hydrocarbon recovery from a tight hydrocarbon formation, the method comprising the steps of:
- creating a plurality of oriented cavities substantially perpendicular to a horizontal portion of a wellbore, wherein the wellbore is provided in the tight hydrocarbon formation, further wherein the oriented cavities extend radially outward from the horizontal portion of the wellbore distance about equal to or greater than one and half times the wellbore diameter;
- injecting a thermally controlled fluid into the wellbore, wherein the temperature of the thermally controlled fluid is selected to alter the temperature of the tight hydrocarbon formation;
- and
- fracturing the tight hydrocarbon formation by generating a plurality of planar fractures.
Dependencies are inferred from the claim text.