Holly Churman to Present at Produced Water Society (PWS) Seminar
Holly Churman, Technology Manager at Water Standard, will present “Evaluating economic tradeoffs in produced water treatment for CEOR flood development” on Wednesday, Jan 27 at 8:10 am at PWS in Houston. As co-author of this presentation, Holly will expand on the abstract below:
One of the most challenging aspects of Chemical Enhanced Oil Recovery (CEOR) is the evaluation of economic trade-offs during the design phase of a project. Often, the most impactful and difficult of these decisions involves modification of the composition of the injection water, as it is uncommon for operators to have suitable water available for CEOR floods without prior treatment. This is particularly important when the injection water source under evaluation is produced water. The extent to which water must be treated to achieve CEOR program objectives must then be determined. A screening workflow has been developed to quantify water treatment strategies on a Net Present Value (NPV) basis to aid water treatment decision making.
One example of a water treatment decision is whether to use hard, high-salinity produced water in a surfactant-polymer (SP) flood, or to soften the water and add alkali in an alkali-surfactant polymer (ASP) flood. Is the cost of softening the water worth the advantages of adding the alkali? Or is there a cost benefit to desalinating and softening the produced water for polymer flooding? We attempt to answer these questions by developing economic case studies for a set of reservoir properties and water compositions.
A unified screening tool merging mechanistic reservoir simulation and modeling of produced water treatment strategies allows users to compare various options on the basis of NPV. Reservoir simulations were completed using parameters derived from laboratory and field-scale measurements to properly capture the impacts of selected produced water softening and desalination methods on the performance of the CEOR floods. Test cases evaluating the use of produced water to drive an ASP pilot in a heterogeneous carbonate were conducted, followed by investigation into other reservoir conditions. This new tool and workflow has proven advantageous to enable users to navigate the difficult decision matrix of produced water driven CEOR flood development.
Robert Fortenberry, Reservoir Engineer, Ultimate EOR Services
Holly Churman, Technology Manager, Water Standard
Lisa Henthorne, SVP and CTO, Water Standard
Modjeh Delshad, President, Ultimate EOR Services
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