System and method for using geological analysis for the designing of stimulation operations

A method for well completion, the method comprising:

• obtaining a plurality of samples of geological material for a subsurface, each sample of geological material obtained from a unique position along a well passing through the subsurface;
• generating primary data for each sample of geological material, the primary data comprising textural data, and/or chemical data and/or mineralogical data;
• using the primary data to derive secondary data for each sample of geological material, the secondary data including a brittleness index for each sample;
• using the primary data and the secondary data to generate tertiary data for the samples of geological material, the tertiary data comprising a quantification of physical characteristics of each respective sample of geological material;
• using the quantification of physical characteristics of each sample of geological material to place the plurality of samples of geological material into a plurality of groups, each group comprising similar physical characteristics;
• and
• using the primary data, the secondary data, the tertiary data and the groups to determine a location of a plurality of stages along a well and an arrangement of perforation clusters in each stage, the location being determined by segmenting the well into a plurality of lengths such that the brittleness indices for all samples of geological material within a given length comprise a lowest standard deviation from a mean value of brittleness index along the given length and the given length falls within a pre-defined maximum length and minimum length, each stage comprising one of the plurality of lengths.

A system for well completion, the system comprising:

• a geological sampling mechanism to obtain a plurality of samples of geological material for a subsurface, each sample of geological material obtained from a unique position along a well passing through the subsurface;
• a primary data generating unit to generate primary data for each sample of geological material, the primary data comprising textural data and/or chemical data and/or mineralogical data;
• a secondary data generating unit to use the primary data to derive secondary data for each sample of geological material from the textural data, the chemical data and the mineralogical data, the secondary data including a brittleness index;
• a tertiary data generating unit
• to use the primary data and the secondary data to generate tertiary data for the samples sample of geological material, the tertiary data comprising a quantification of physical characteristics of each sample of geological material and
• to place the plurality of samples of geological material into a plurality of groups, each group comprising similar physical characteristics;
• and a well completion determination unit to use the primary data, the secondary data and the tertiary data to determine a location of a plurality of stages along the well and an arrangement of perforation clusters in each stage, by segmenting the well into a plurality of lengths such that the brittleness indices for all samples of geological material within each given length among the lengths to have a lowest standard deviation from a mean value of brittleness index along the given length, and
• the given length to be within a pre-defined range.