Method to form an actual sales or delivery value for all components of a commingled hydrocarbon fluid stream
A method to form an actual sales value or actual delivery value for all components of a comingled hydrocarbon fluid stream using a theoretical comingled hydrocarbon fluid stream molecular composition.
1. A method for computing an actual sales value or an actual delivery value for all of a plurality of commodities of a comingled hydrocarbon fluid stream, comprising the steps of:
c. determining a plurality of molecular compositions, one molecular composition for each of the hydrocarbon samples, wherein each of the molecular compositions comprises a plurality of components;
d. applying a virtual tag to each of the plurality of components, forming a plurality of tagged components for each hydrocarbon sample;
e. entering the plurality of tagged components into a process simulation model (PSM) for a specified facility;
f. using a computer processor with the process simulation model (PSM) for the specified facility to compute a theoretical comingled hydrocarbon fluid stream molecular composition and compute a member of the group consisting of: a component mass, a component volume, a component energy, or combinations thereof, for each theoretical comingled hydrocarbon fluid stream molecular composition using the mass, the volume, the energy, or combinations thereof of the plurality of hydrocarbon fluid streams; and
g. using at least one computer processor, pro-rate the theoretical comingled hydrocarbon fluid stream molecular composition to an agreed upon volume, an agreed upon mass, an agreed upon energy, or combinations thereof, between a buyer and a seller, to form the actual sales value or actual delivery value for each component in the comingled hydrocarbon fluid stream.
2. The method of claim 1 , concurrently with step (g), the step of calculating the location of any one of the plurality of tagged components as any one of the plurality of tagged components is processed through any part of the specified facility, and wherein the step of calculating the location accommodates any phase change experienced by any portion of any one of the tagged components.
3. The method of claim 1 , wherein the process simulation model comprises at least one phase change for at least one of the plurality of tagged components.
4. The method of claim 1 , wherein at least one of the pluralities of commodities can include a member of the group consisting of: a crude oil, a condensate, a natural gas, a liquefied natural gas, a liquefied petroleum gas, or combinations thereof.
5. The method of claim 1 , wherein the plurality of hydrocarbon fluid streams include at least one production stream.
6. The method of claim 5 , wherein the at least one production stream is an offshore production stream.
7. The method of claim 1 , wherein the plurality of hydrocarbon fluid streams include a pipeline condensate, a “retrograde” condensate or combinations thereof.
8. The method of claim 1 , wherein virtual tag includes an identified production source.
9. The method of claim 8 , wherein the identified production source comprises: a geographic location, an arbitrary name given by a production source or equipment owner, a leased production field name, a name of an operator of a field, a name of an operator of a well, a name of a hydrocarbon producer, a name of a purchaser of one of the plurality of hydrocarbon fluid streams, or combinations thereof.
10. The method of claim 1 , wherein the process simulation model comprises an equation of state.
11. The method of claim 1 , wherein at least one of the plurality of hydrocarbon samples is obtained through a continuous sampling system, a batch sampling system or another spot sampling system.
12. The method of claim 1 , wherein the step for determining at least one of the plurality of molecular compositions is by a member selected from the group: gas chromatography, distillation, pressure volume temperature analysis, infrared analysis, titration, thermal spectral analysis, or combinations thereof.
13. The method of claim 1 , wherein the plurality of components of the molecular composition comprise: nitrogen, argon, helium, carbon dioxide, oxygen, sulfur and sulfur species, water, C1 through C-100 hydrocarbons, and combinations thereof.
14. The method of claim 1 , wherein the virtual tag comprises: a chemical name of one of the plurality of component and a member of the group consisting of: a number, a bar code, a color, an alphanumeric indicator, an animation, a series of objects, a biometric indicator, a hexadecimal code or combinations thereof.
15. The method of claim 1 , wherein the specified facility of the PSM is a geographically identifiable facility.
16. The method of claim 1 , wherein the actual sales value or actual delivery value is computed when custody transfer of the comingled hydrocarbon fluid stream occurs from the seller to the buyer and money is assigned to the seller based on component volumes, component energies, component masses or combinations thereof for each component of the comingled hydrocarbon fluid streams.