📚 Eksplorasi & Komparasi Topik Dokumen

EVALUASI PARAMETER DESAIN REKAHAN TERHADAP PRODUKTIVITAS RESERVOIR: STUDI KORELASI ANTARA SRV DAN VOLUME DRAINASE TRANSIEN TEKANAN DALAM SIMULASI RESERVOIR NON-KONVENSIONAL

Unconventional tight oil reservoirs are characterized by ultra-low permeability, making multi-stage hydraulic fracturing (MSHF) essential to achieve commercial hydrocarbon production. The effectiveness of MSHF is governed by fracture design parameters that control the extent of Stimulated Reservoir Volume (SRV). However, geometric SRV estimation does not always represent the dynamically drained reservoir volume contributing to production. Therefore, this study evaluates the influence of hydraulic fracturing design parameters on reservoir productivity and develops a correlation between geometric SRV and dynamic Drainage Volume (DV). A three-dimensional synthetic tight oil reservoir model was developed using the CMG IMEX black-oil simulator. Hydraulic fractures were represented using a single-porosity model with Local Grid Refinement (LGR). Sensitivity analyses were conducted by varying fracture stages and fracture half-length over a 20-year production period under constant-rate conditions. Dynamic DV was determined through pressure drawdown analysis during pseudo-steady-state flow. The study established an empirical relationship between DV and SRV with an R2 value of 0.8775 The techno- economic assessment also demonstrated that increasing fracture dimensions beyond the optimum design produces diminishing economic returns because of substantially higher capital expenditures (CAPEX). The highest Pre-Tax Net Present Value (NPV), amounting to USD 9,995,763.75, was obtained using a configuration of 17 fracture stages with a 500-ft fracture half-length. Increasing the fracture half-length beyond 500 ft reduced the NPV, indicating that this configuration represents the economic optimum for the evaluated reservoir.