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AssigneeConocoPhillips Company
InventorsGerald Eric Michael, Olufemi Akande Jokanola
Estimating the term…
Methods and systems are provided for allocating production among reservoir compartments by way of compositional and isotopic analyses. That is, where individual reservoir compartments contribute differing amounts of fluid to a commingled production stream, the methods herein determine the relative contribution of fluid volume from each reservoir compartment. Both a composition-based relative contribution and an isotope-based relative contribution of fluid from each reservoir compartment may be determined to allocate production to each reservoir compartment, the determinations respectively being based on composition mass balances and stable carbon isotope mass balances of components. The combination of both allocation analyses provides quality checks on the results that identify improper allocations that may arise. In addition to production allocation, other applications include, among others, determining the effectiveness of intervention operations and providing feedback for adjusting operations. Advantages include lower costs, higher accuracies, and ease of use as compared to conventional methods.
An allocation method for allocating production among a plurality of reservoir compartments in a subterranean formation, the allocation method comprising the steps of:
An evaluation method for assessing the effectiveness of an intervention operation in a subterranean formation having a plurality of reservoir compartments, each reservoir compartment having a reservoir fluid, wherein each reservoir fluid is characterized by a plurality of components, wherein the plurality of components comprises a plurality of carbon-based components, wherein each carbon-based component of each reservoir compartment comprises a plurality of stable carbon isotopes, wherein the evaluation method comprises the steps of:
An evaluation method for evaluating an effectiveness of applying an allocation method from a first wellbore to a second wellbore wherein the first wellbore is disposed in a subterranean formation having a plurality of reservoir compartments, each reservoir compartment having a reservoir gas, wherein each reservoir gas is characterized by a plurality of components, each component having a stable carbon isotope value, wherein the evaluation method comprises the steps of:
An allocation method for allocating production among a plurality of reservoir compartments in a subterranean formation, each reservoir compartment having a reservoir gas, wherein each reservoir gas is characterized by a plurality of components, each component having a stable carbon isotope value, wherein the evaluation method comprises the steps of:
Dependencies are inferred from the claim text.