Low frequency distributed acoustic sensing hydraulic fracture geometry

A method of recovering hydrocarbons from a hydrocarbon-containing reservoir comprising:

• drilling at least one operation well;
• drilling at least one monitor well;
• installing a distributed acoustic sensing (DAS) fiber in said monitor well;
• fracturing an operation well using pre-determined fracturing parameters to form a set of fractures;
• obtaining DAS data from said monitor while fracturing said operation well;
• down-sampling the DAS data to 1 s after a low-pass anti-aliasing filter (0-0.5 Hz) to obtain Low-Frequency DAS data;
• characterizing the far-field fracture length, height, width and density of said fractures;
• updating said pre-determined fracturing parameters based on said characterizing step;
• and,
• fracturing an operation well to form at least one additional set of fractures;
• and,
• producing hydrocarbons.

A computer-implemented method for modeling the stimulated reservoir volume (SRV) of a hydrocarbon-containing reservoir, the method comprising:

• drilling at least one operation well into an area of said reservoir to be stimulated;
• drilling at least one monitoring well in said reservoir;
• installing at least one distributed acoustic sensing (DAS) fiber in at least one monitoring well;
• obtaining DAS data while fracturing at least one operation well in a first fracture stimulation stage according to pre-determine fracturing parameters to form a set of fractures;
• down-sampling the DAS data to 1 s after a low-pass anti-aliasing filter (0-0.5 Hz) to obtain Low-Frequency DAS data;
• identifying said set of fractures formed in said fracturing step;
• and,
• characterizing the complexity, length, branching, or density of said fractures.