Generating and enhancing microfracture conductivity

A method comprising:

• (a) introducing a micro-proppant treatment fluid into a subterranean formation at a rate and pressure sufficient to create or enhance at least one fracture in a first treatment interval within the subterranean formation, wherein the micro-proppant treatment fluid comprises a first aqueous base fluid and micro-proppant particulates having a size in the range of about 1 μm to about 100 μm coated with a first aqueous-based surface modification agent, thereby forming coated micro-proppant particulates;
• (b) placing the coated micro-proppant particulates into the at least one fracture;
• (c) introducing a surface modification treatment fluid into the subterranean formation, wherein the surface modification treatment fluid comprises a second aqueous base fluid and a second aqueous-based surface modification agent;
• (d) coating at least a portion of a face of the at least one fracture with the second aqueous-based surface modification agent;
• (e) introducing a macro-proppant treatment fluid into the subterranean formation intermittently between a substantially solids-free fluid, so as to alternate the macro-proppant treatment fluid and the substantially solids-free fluid within the at least one fracture to form separate islands or pillars with void space therebetween, wherein the macro-proppant treatment fluid comprises a third aqueous base fluid and macro-proppant particulates having a size in the range of about 150 μm to about 2500 μm;
• and
• (f) placing the macro-proppant particulates into the at least one fracture so as to form a proppant pack therein,
• wherein the first aqueous-based surface modification agent is present in the micro-proppant treatment fluid in an amount in the range of from about 0.01% to about 1% by volume of the micro-proppant treatment fluid, and
• wherein the second aqueous-based surface modification agent is present in the surface modification treatment fluid in an amount in the range of from about 2 to about 5 times the amount of the first aqueous-based surface modification agent present in the micro-proppant treatment fluid.

A method comprising:

• (a) introducing a micro-proppant treatment fluid into a subterranean formation at a rate and pressure sufficient to create or enhance at least one fracture in a first treatment interval within the subterranean formation, wherein the micro-proppant treatment fluid comprises a first aqueous base fluid and micro-proppant particulates having a size in the range of about 1 μm to about 100 μm coated with a first aqueous-based surface modification agent, thereby forming coated micro-proppant particulates;
• (b) placing the coated micro-proppant particulates into the at least one fracture;
• (c) introducing a surface modification treatment fluid into the subterranean formation, wherein the surface modification treatment fluid comprises a second aqueous base fluid and a second aqueous-based surface modification agent;
• (d) coating at least a portion of a face of the at least one fracture with the second aqueous-based surface modification agent;
• (e) introducing a macro-proppant treatment fluid into the subterranean formation intermittently between a substantially solids-free fluid, so as to alternate the macro-proppant treatment fluid and the substantially solids-free fluid within the at least one fracture for forming separate islands or pillars with void space therebetween, wherein the macro-proppant treatment fluid comprises a third aqueous base fluid, macro-proppant particulates having a size in the range of about 150 μm to about 2500 μm, and degradable macro-proppant particulates;
• (f) placing the macro-proppant particulates and the degradable macro-proppant particulates into the at least one fracture;
• and
• (g) degrading the degradable macro-proppant particulates,
• wherein the first aqueous-based surface modification agent is present in the micro-proppant treatment fluid in an amount in the range of from about 0.01% to about 1% by volume of the micro-proppant treatment fluid, and
• wherein the second aqueous-based surface modification agent is present in the surface modification treatment fluid in an amount in the range of from about 2 to about 5 times the amount of the first aqueous-based surface modification agent present in the micro-proppant treatment fluid.