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Effect of heterogeneity on engineered water injection in carbonates using five-spot sector model:A numerical study

Petroleum 2022年第3期8卷 375-390页

作者： Jamiu Oyekan Adegbite Emad Walid Al-Shalabi Petroleum Engineering Department Khalifa University of Science and TechnologySas Al Nakhl CampusAbu DhabiUnited Arab Emirates

One of the promising and emerging enhanced oil recovery techniques in both sandstones and carbonates is engineered water injection(EWI).However,few studies discussed the field-scale applications of this technique in heterogeneous carbonate *** paper is an extension of our previous work of the EWI technology at *** research numerically investigates heterogeneity effect on EWI technique in carbonates at field-scale using five-spot *** synthetic five-spot sector models were considered including homogeneous,heterogeneous with permeability channeling,and heterogeneous with gravity *** results showed that EWI improves both volumetric and displacement sweep efficiencies compared to conventional formation water injection(FWI)for all models ***,tracer method is recommended for better estimation of volumetric sweep efficiency as opposed to fractional flow ***,secondary EWI outperforms other techniques including secondary FW and tertiary *** addition,the observed delay in tertiary EWI can be reduced by increasing well injection pressure and sulfate concentration in the engineered *** optimum sulfate concentration of 25,000 ppm is recommended for achieving the highest oil recovery by *** study gives more insight into understanding the performance of the EWI technique at *** for boosting the performance of this technique have been discussed,which assure more certainty and lower risk.

关键词： Engineered water injection(EWI) Low salinity water injection(LSWI) Field application permeability channeling Gravity underride

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