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  • Storage expansion in faulted, fractured carbonate (OK, USA)

    Storage expansion in faulted, fractured carbonate (OK, USA)

    NITEC history matched a dual-porosity simulation model for this 40 BCF naturally fractured and faulted carbonate gas storage reservoir. The study required developing a new reservoir characterization for the nature fractures using NITEC fracture characterization technology. The model was used to evaluate the deliverability benefits from in-fill wells vs. well workovers vs additional compression. (58 wells, 28.2 BCF working gas, 660 MMcf/d)

  • Improve deliverability with in-fill wells (TX, USA)

    Improve deliverability with in-fill wells (TX, USA)

    NITEC developed the reservoir characterization from old vintage well logs for this 65 well 75 BCF gas storage field which was input to the simulation model. The model was successfully history match and provided deliverability predictions for 15 in-fill wells increasing storage capacity to 96 BCF working gas with peak rate of 1,230 MMCF/d

  • Vertical well replacement with horizontal wells (KY, USA)

    Vertical well replacement with horizontal wells (KY, USA)

    NITEC completed a storage optimization study for a large storage field in Kentucky, initially with over 150 old vertical wells, 135 BCF Total gas and 730 MMcf/d peak deliverability. The history matched model was used to evaluate replacing old vertical wells with horizontal wells, surface gathering system improvements (12 branched/looped lines), and additional compression power. Currently, the field has 13 horizontal wells, increased deliverability to 1,030 MMcf/d, and improved working gas to total gas efficiency.

  • Gas Migration Control (Midwest USA)

    Gas Migration Control (Midwest USA)

    NITEC developed a complex reservoir simulation involved two aquifer storage formations and an oil production – gas recovery formation above the main storage zone. This field was old with vintage well logs and data records. The objective for the study was to determine the volume of gas migration into the recovery formation over the past 50 years and provide operations strategy to minimize future gas migration.

  • Impact of 3rd party operations (KY, USA)

    Impact of 3rd party operations (KY, USA)

    NITEC evaluated the impact of 3rd party E&P operations outside the storage boundary on this storage fields gas recovery-zone in the cap rock above the aquifer storage field. The storage and gas-recovery operations had been stable for many years until recent E&P activity in the surrounding areas was targeting the shale caprock. NITEC was able to confirm that the E & P activity was negatively impacting the storage operations and developed a counter-strategy to protect the stored gas in the recovery zone.

  • Increase working gas, control migration, in-fill wells (NE, USA)

    Increase working gas, control migration, in-fill wells (NE, USA)

    NITEC conducted an integrated reservoir study in a complex fluvial sand gas storage field to provide operations strategies for controlling gas migration between the main storage structure and a small low productivity structure and improving deliverability and working gas capacity. The project resulted in 10 new wells which increased deliverability by 75 MMCF/d and increased working gas by 10 BCF and provided a strategy to eliminate the gas migration.

  • Depleted oil converted to gas storage and oil production (Texas)

    Depleted oil converted to gas storage and oil production (Texas)

    NITEC conducted a detailed evaluation of this complex gas storage field with oil production. The field was a faulted anticline resulting in partial compartmentalization impacting the communication from two portions of the gas bubble and the downslope oil leg. The valuation was dependent on confirming well productivity/deliverability rates and increased oil production with the storage expansion. NITEC was able to identify key areas of uncertainty regarding the production claims as well as regulatory issues that were used in the client’s valuation model.

  • Depleted gas developed into gas storage (Colorado)

    Depleted gas developed into gas storage (Colorado)

    NITEC represented the buyer in technical assessment meetings as part of our evaluation process. This field was comprised of two dome shape lobes connect through a syncline. The key issue for this field was to assess the connective between the two domes and additional base gas requirements as well as evaluate reservoir containment risks due to unmapped adjacent areas. NITEC provided the client with valuable insight into the stratigraphic complexities in this region.

  • Old deep carbonate oil field (SE USA)

    Old deep carbonate oil field (SE USA)

    NITEC conducted a detail field study to evaluate the gas storage potential of a deep depleted oil carbonate reservoir. The study included geology and petrophysics analyses to create a reservoir characterization model for a detailed reservoir simulation study. The simulation model history matched the original depletion period, matching oil, water and gas rates and pressure observation data. Due to the depth and anticipated operating pressure for the storage operations, a compositional model was required to accurately predict the miscible interactions between the gas and remaining oil and the resulting oil production. The results were used to design the liquid handling requirements for the surface facility.

  • Old heavy oil field (Argentina)

    Old heavy oil field (Argentina)

    NITEC performed a detail field study to determine the gas storage potential of a depleted oil fluvial sand reservoir. The study included geology and petrophysics analyses to create a reservoir characterization model for a detailed reservoir simulation study. The simulation model history matched the original depletion period, matching the oil and gas rates and pressure data. The optimal development required groups of 3 horizontal wells with gas injection used to sweep the remaining oil into the center production well, ultimately increasing the reservoir pore volume available for gas storage as well as recovering additional oil volume. The initial test development wells were drilled, proving the validity of the reservoir characterization, but economic conditions tabled the project.

  • Optimize Helium Recovery (TX, USA)

    Optimize Helium Recovery (TX, USA)

    NITEC developed a complex reservoir simulation for the world’s only helium gas storage field. The storage operation is located in a natural fracture and faulted carbonate formation. NITEC performed an integrated reservoir characterization (stratigraphy, structure, petrophysics, and seismic) as well as using its fracture characterization technology to develop the dual-porosity 4 component composition simulation model. The model successfully history match 78 years of operations with over 3,500 pressure points and 7000 gas composition points. The model is still in use today for prediction the helium recovery as the storage field is being depleted and abandoned.