Production of a blending agent using an in situ thermal process in a relatively permeable formation

A method, comprising:

• producing a first mixture from a first part of a relatively permeable formation, wherein the first mixture comprises heavy hydrocarbons;
• providing heat from one or more heaters to a second part of the relatively permeable formation such that the heat pyrolyzes at least some hydrocarbons in the second part of the formation;
• producing a second mixture from the second part of the relatively permeable formation;
• and
• blending at least a portion of the first mixture with at least a portion of the second mixture to produce a third mixture comprising a selected property.

A method, comprising:

• providing heat from one or more heaters to at least a portion of a first relatively permeable formation;
• allowing heat to transfer from one or more of the heaters to a part of the first relatively permeable formation such that the heat reduces the viscosity of at least some hydrocarbons in the part of the first relatively permeable formation;
• allowing heat to transfer from one or more of the heaters to a part of a second relatively permeable formation such that the heat pyrolyzes at least some hydrocarbons in the part of the second relatively permeable formation;
• producing a first mixture from the part of the second relatively permeable formation;
• injecting at least a portion of the produced first mixture into a production well the part of the first relatively permeable formation such that the portion of the produced first mixture blends with at least a portion of the hydrocarbons in the part of the first relatively permeable formation to produce a second mixture in the production well;
• and
• producing the second mixture from the production well, wherein the second mixture comprises a selected property.

A method, comprising:

• providing heat from one or more heaters to at least a portion of a first relatively permeable formation;
• allowing heat to transfer from one or more of the heaters to a part of the first relatively permeable formation such that the heat reduces the viscosity of at least some hydrocarbons in the part of the first relatively permeable formation;
• allowing heat to transfer from one or more of the heaters to a part of a second relatively permeable formation such that the heat pyrolyzes at least some hydrocarbons in the part of the second relatively permeable formation;
• producing a first mixture from the part of the second relatively permeable formation;
• injecting at least a portion of the produced first mixture into the part of the first relatively permeable formation such that the first mixture blends with at least a portion of the hydrocarbons in the part of the first relatively permeable formation to produce a second mixture;
• and
• producing the second mixture from the part of the first relatively permeable formation, wherein the second mixture comprises a selected property.