00:00:00 INTRODUCTION See the strategy. Understand the reservoir. A reservoir strategy is only as useful as our ability to understand it. Welcome to E O R Studio. In this tutorial, we explore a seven-well carbonate model, from setup to the movement of chemicals and the final recovery comparison. 00:00:19 INTRODUCTION One connected workflow This case brings together heterogeneous rock, pressure-controlled wells, polymer transport, and reactive water chemistry. The strength of the workflow is that you can connect the inputs, the underground response, and the production results in one study. 00:00:38 01 / OPEN THE CASE Start with the actual case In the Project Hub, click Add folder and select the l s p seven-wells folder. Right-click l s p seven-wells dot dat, then choose Open in Model Designer. The seawater baseline is the separate file ending in underscore s w. 00:00:57 02 / UNDERSTAND THE MODEL A layered carbonate reservoir The reservoir has twenty-five by twenty-five cells in plan and five layers vertically. It covers seven hundred and fifty metres in each horizontal direction and is sixteen metres thick. All three thousand, one hundred and twenty-five cells are active. The display exaggerates thickness to make the layers visible. 00:01:21 02 / UNDERSTAND THE MODEL Rock controls the flow paths The rock is deliberately heterogeneous. Horizontal permeability ranges from about two to two thousand, five hundred millidarcies. Porosity ranges from eight to almost thirty percent. These differences create preferential flow paths, so a seven-well pattern does not sweep every part of the reservoir equally. 00:01:46 03 / REVIEW THE WELLS Seven wells. Real constraints. On the Wells page, inspect the three injectors and four producers. Each well is completed through all five layers. The injectors target three hundred cubic metres per day, with a maximum bottom-hole pressure of three hundred and fifty bar. Producers target two hundred and twenty-five cubic metres of liquid per day, with a minimum pressure of one hundred and twenty bar. 00:02:14 04 / DESIGN THE FLOOD Three stages. Eight model years. The schedule begins with three years of seawater injection. From year three to four and a half, inject low-salinity water with one kilogram of polymer per cubic metre. Then stop the polymer and continue low-salinity chase water until year eight. The diluted injection water has one tenth of the specified seawater element totals. 00:02:39 04 / DESIGN THE FLOOD Set the polymer slug Select the second schedule period. Check the end time, the polymer concentration, and the L S W water solution for all three injectors. For the third period, polymer becomes zero while L S W remains selected. This is a slug followed by chase water, rather than continuous polymer injection. 00:03:05 05 / CONNECT THE PHYSICS Polymer is more than a tracer On the Chemical E O R page, review viscosity, adsorption, and retention. At the reference chemistry, one kilogram per cubic metre gives a viscosity multiplier of ten. The case also includes inaccessible pore volume, irreversible adsorption, and residual resistance. The salinity and hardness correction changes polymer viscosity as the water chemistry evolves. 00:03:34 05 / CONNECT THE PHYSICS Water chemistry affects the model The Geochemistry page defines formation water, seawater, and low-salinity water. The model includes calcite equilibrium and cation exchange at eighty degrees Celsius. A specified calcium exchange fraction controls interpolation between two sets of relative-permeability curves. This is a model assumption that should be calibrated against experiments. 00:04:01 06 / CHECK AND RUN Check the deck before running Use Check with simulator, or F seven, before running. The model passes the deck reader check. Review the warnings as well: the supplied geometry factor is ignored, and the simulator uses a Peaceman equivalent radius for the well index. A successful input check confirms readability; it does not establish physical validation. 00:04:28 06 / CHECK AND RUN Submit a simulation job Return to the Project Hub, right-click the deck, and choose Run simulation. Confirm the dataset, select a separate output folder, and choose the CPU threads. Click Run. The job table shows progress, while the log reports the simulated time, well rates, pressures, and solver information. 00:04:53 06 / CHECK AND RUN Follow the model through time A demonstration run is shown here in the job manager. For the results analysis that follows, we use the completed result files supplied with the case. Open l s p seven-wells dot s res dot h five to inspect the spatial response. Summary C S V files hold the field and well curves. 00:05:17 07 / EXPLORE THE RESULTS Navigate the 3D Viewer In the three-D Viewer, choose the property and move through time with the slider or playback controls. Use all steps for the color range, so the same color means the same value across the run. Oil saturation shows the remaining oil fraction. Polymer and chloride show different aspects of chemical transport. 00:05:42 07 / EXPLORE THE RESULTS Watch the sweep develop Watch the oil saturation change at the saved half-year report times. Low oil saturation around the injectors indicates displacement. Oil remains in less-swept regions and along parts of the model boundary. This spatial view helps explain where recovery occurs and where further optimization may be needed. 00:06:05 07 / EXPLORE THE RESULTS Follow the polymer slug Polymer appears after year three, spreads from the injectors, and continues moving after injection stops at year four and a half. Concentration is reduced by dilution, transport, and adsorption. The saved report steps show the slug advancing toward the producers and leaving a concentration trail behind it. 00:06:29 07 / EXPLORE THE RESULTS Locate the low-salinity front Chloride gives a clear view of the changing water composition. Formation water begins at one point two moles per kilogram of water, seawater is zero point five six six, and the low-salinity injection solution is zero point zero five six six. The front moves unevenly through the heterogeneous layers. 00:06:53 07 / EXPLORE THE RESULTS Connect chemistry to flow The G C omega field is the wettability interpolation weight. Zero selects the first curve set; one selects the second. It changes with the modelled calcium exchange fraction. Seawater also changes the chemistry, so this image should be interpreted together with the baseline and the defined rock-fluid assumptions. 00:07:17 08 / COMPARE STRATEGIES Measure the recovery difference At the end of the supplied run, the combined low-salinity polymer strategy recovers fifty-three point three nine percent of the initial oil. The continued seawater case recovers forty-eight point eight three percent. The gain is four point five five percentage points, or about fifty-nine thousand, seven hundred and sixty-six cubic metres of additional oil. This comparison measures the combined strategy. 00:07:48 08 / COMPARE STRATEGIES Recovery has an injectivity trade-off During the polymer stage, all three injectors reach the three hundred and fifty bar pressure ceiling. Their rates fall below the nine hundred cubic metres per day field target. After the polymer stops, injection recovers. This is an important strength of the model: recovery can be studied together with operating constraints. 00:08:13 09 / INTERPRET RESPONSIBLY Check the evidence behind the picture The supplied low-salinity polymer log records two hundred and thirty-five accepted steps and zero failed steps. It reports small normalized final balance errors, including about two times ten to the minus eight for oil. Forty-two steps were accepted using a relaxed stagnation criterion. These are numerical diagnostics. Field confirmation and experiment-based calibration are still required. 00:08:44 EOR STUDIO Build. Test. Understand. E O R Studio helps turn a flooding idea into a traceable study: define the model, test the schedule, explore the chemistry, and compare recovery with pressure limits. This seven-well example is a starting point for teaching, research, and further validation. Explore the case, ask questions, and develop the next strategy.