Our proprietary process for extracting DNA from low biomass samples is utilized to create the baseline for all zones of interest either from wet cuttings or core samples, without being impacted by the mud system used (oil based or water based).
Fluid samples are taken at the first accessible point at surface, which can be e.g. the wellhead or the separator. Depending on the desired answer products, samples of frac fluids or injected fluids are used in addition in the analysis process.
Stringent process control and respective QA/QC information build the foundation for repeatable and reliable analysis results. Key parameters evaluated and provided include Biomass and Subsurface Signal Strength vs Background Signal.
Tracking of fluid origin and fluid movement finally is enabled by providing unique DNA markers and relative abundance of DNA markers and the sampling depth and integration with formation tops and petrophysical logs.
DNA markers and their respective abundance in the fluid samples are compared using proprietary data science methods with the previously obtained DNA Stratigraphy to provide probabilistic total fluid (water+oil) contributions from the sampled formations and indicate contributions from above or below the established base line.
Fluid-Fluid Analysis is the primary mechanism to determine actual connectivity between wellbores and hence if they produce from the same volume.
Principle Coordinate Analysis (PCOA) is the underlying data science approach to compare multiple produced fluids.