OneSTEP Sandstone Acid | Matrix Stimulation | Schlumberger

OneSTEP

Simplified sandstone stimulation system

Stimulate sandstone reservoirs with a single fluid-stage formulation

The OneSTEP simplified sandstone stimulation system is a new approach that uses only one fluid stage. Rigorously engineered fluid systems and reduced volumes provide a lower-risk, cost-effective solution. The OneSTEP system removes damage caused by carbonate scale or other types of scale and by drilling fluids, clays, and other aluminosilicates.

The OneSTEP system offers more uniform stimulation of sandstone reservoirs with less risk of disintegrating the rock. It mitigates the risk of secondary and tertiary precipitates and reduces the tendency for acid emulsion and sludge formation. In addition, the OneSTEP system offers less corrosion risk to tubulars and equipment. It increases production with minimal risk and offers effective formation damage removal. The OneSTEP system promotes the stimulation of wells that were previously bypassed because of the fear of potential damage from conventional treatments.

Effective damage removal
PDVSA Increases Cumulative Oil Production in Three Wells by 1,174 bbl/d Using OneSTEP System
Simplified sandstone stimulation system reduces conventional mud acid treatment volume by 57%, and saves PDVSA two days in one well on average
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Small operational footprint

The single fluid stage formulation saves costs because it requires less equipment, and it also saves preparation time. In addition, reduced equipment requirements offer a smaller operational footprint, especially important in offshore activity. A single fluid stage permits simpler operations and reduces personnel exposure to health, safety, and environmental risks. Additionally, because only one fluid is used, the OneSTEP system reduces fluid placement sequence risk when treating long formation intervals. It offers a reduced chemical package that significantly reduces any compatibility issues with produced hydrocarbons.

Candidate selection using Virtual Lab geochemical simulation software is integral to the OneSTEP system process. The software incorporates the results of slurry reactor tests and the candidate core tests to make predictions about treatment effects on damage removal and effective job volumes. Multiple treatments can be compared to select the best treatment for each well. This approach reduces the risk of mismatching fluids or using an incorrect fluid design for stimulation of a particular formation.

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