ENHANCING RESERVOIR FLUID ANALYSIS USING PARTITIONING COEFFICIENTS

摘要

Methods and systems of analyzing a reservoir fluid based on surface measurements of fluids circulated in a wellbore are provided. A fluid (e.g., a drilling fluid) with known properties is circulated within a wellbore where it is exposed to a reservoir fluid. A gas extractor is used to analyze a sample of the gas phase of the circulated fluid to determine the composition of the gas phase. Partitioning coefficients are used to calculate the composition of the solid, aqueous, organic, and gas phases of the circulated fluid. The composition of the fluid before and after circulation through the wellbore is compared to determine the composition of the reservoir fluids.

主权项

1. A method comprising:
exposing a fluid to at least a portion of a subterranean reservoir; returning the fluid to the surface; removing a gas sample from the fluid after the fluid has been returned to the surface; analyzing the gas sample to determine at least one characteristic of the gas sample; and using the characteristic of the gas sample and at least one partitioning coefficient to calculate at least one characteristic of at least one non-gas phase of the fluid.