Development and Application of an Integrated Physical Plugging Removal and Water Cut Reduction Process for the Western G Reservoir

To address the development challenges of densely distributed thin layers and prominent interlayer conflicts in the western G oil reservoir, this study aims to overcome the limitations of conventional acidizing techniques that exacerbate water cut increase, while exploring a novel approach through physical plugging removal technology to achieve synergistic optimization of production enhancement and water reduction. The research focuses on resolving key technical issues, including selective stimulation of multi-thin layered reservoirs and regulation of seepage pathways. By integrating cable-conveyed drag directional plugging removal technology with reservoir fracture propagation direction control methods, a “dual-path” optimization strategy was established: First, multi-parameter comprehensive evaluation was employed to screen high oil-saturation intervals, utilizing cable-drag technology to achieve vertical precision plugging removal. Second, based on physical modeling and fracture morphology analysis, well locations with fracture propagation directions orthogonal to main water injection streamlines were optimized, complemented by tailored aerodynamic parameter combinations. Real-time adjustment of operational plans was implemented through acoustic time difference monitoring and tracer testing during field execution. Field tests on five wells demonstrated an average water cut decrease of 21.6 percentage points and a more than 3-fold increase in single-well oil production. These results validate the reservoir-selective stimulation and synergistic seepage pathway optimization capabilities of physical plugging removal technology, establishing a new technical paradigm for developing multi-thin layered reservoirs with high water cut.