Patent ID: 6732796
Filing Date: 2004-05-11
Classification: C09K,E21B,Y02C,Y02P,Y10S

Abstract:
A method of treating a hydrocarbon containing formation in situ, comprising:allowing heat to transfer from heat sources to a part of the formation such that the heat from one or more of the heat sources pyrolyzes some hydrocarbon material in the part of the formation; producing pyrolysis products from the formation; heating a first section of the part with one or more of the heat sources to heat the first section to a temperature sufficient to allow generation of synthesis gas; providing a first synthesis gas generating fluid to the first section to generate a first synthesis gas; removing a portion of the first synthesis gas from the formation; heating a second section of the part with one or more of the heat sources to heat the second section to a temperature sufficient to allow generation of synthesis gas having a H2 to CO ratio greater than a H2 to CO ratio of the first synthesis gas; providing a second synthesis gas generating fluid to the second section to generate a second synthesis gas; removing a portion of the second synthesis gas from the formation; and blending a portion of the first synthesis gas with a portion of the second synthesis gas to produce a blended synthesis gas having a selected H2 to CO ratio.