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oai:figshare.com:article/33993886 2026-09-25T07:51:47Z category_143 portal_316 item_type_3 month_year_09_2026

Supplementary file 1_Beggs-Brill model correction for bottomhole flowing pressure prediction of water-producing gas wells: a case study in Block A, Bohai Bay Basin (China).docx Junwu Liang (10878271) Yan Yan (208529) Solid Earth Sciences Beggs-Brill model bottomhole flowing pressure liquid holdup model optimization water-producing gas wells Introduction<p>Bottomhole flowing pressure (BHP) is a fundamental parameter for production-performance analysis, productivity evaluation, and rational production allocation in water-producing gas wells. However, the original Beggs–Brill model produces substantial liquid-holdup and BHP-prediction errors under the high-salinity, directional-well, and wide gas–water ratio (GWR) conditions of Block A.</p>Methods<p>Seven representative two-phase-flow pressure-drop models were evaluated to select a baseline model. Actual liquid holdup was back-calculated using field measurements from 25 calibration wells. Flow-regime-specific horizontal-pipe liquid-holdup correlations were developed for segregated, intermittent, and dispersed flow. The inclination correction was further optimized by introducing a GWR–well-inclination coupling term. The resulting model was validated using 10 independent wells.</p>Results<p>The coefficient of determination for liquid-holdup fitting exceeded 0.88 for all flow regimes. The mean absolute percentage error of BHP prediction decreased from 15.20% to 7.87%, corresponding to a 48.22% error reduction. Eighty percent of the validation wells had errors within the engineering limit of 10%. Prediction accuracy was particularly high under medium- to high-GWR conditions.</p>Discussion<p>The optimized model provides accurate BHP calculations within the validated operating range of Block A and offers a useful reference for model optimization in analogous water-producing gas reservoirs.</p> 2026-09-25T07:51:47Z Dataset Dataset 10.3389/feart.2026.1894534.s001 https://figshare.com/articles/dataset/Supplementary_file_1_Beggs-Brill_model_correction_for_bottomhole_flowing_pressure_prediction_of_water-producing_gas_wells_a_case_study_in_Block_A_Bohai_Bay_Basin_China_docx/33993886 CC BY 4.0