SETC delivers fully integrated drilling and fracturing service packages across key basins including Ordos and Bohai Bay. These services span the entire project lifecycle, offering a seamless combination of subsurface evaluation and operation execution. The scope of work includes comprehensive reservoir characterization, and the development of integrated geological-engineering plans tailored to each asset. For individual wells, SETC provides end-to-end technical design, covering geological modeling, drilling, and fracturing programs. Field execution encompasses drilling, cementing, mud logging, well testing, and hydraulic fracturing operations. Additionally, we manage core recovery and laboratory analysis, while ensuring timely supply of oilfield chemicals and downhole materials. By integrating multidisciplinary expertise with advanced project coordination, SETC enhances operational efficiency, reduces risk, and maximizes reservoir performance.
During the execution of Well S392, SETC implemented a suite of advanced, geology-driven technologies to address the unique challenges of the reservoir, which included tight sandstone formations, thin oil layers, and complex vertical oil-water distributions.
To precisely identify the horizontal target zone within these thin reservoirs, SETC employed an innovative “new pilot well + sealed core recovery” approach. In areas characterized by subtle structural features, reservoir uncover rates were significantly improved by utilizing near-bit measurement tools, real-time trajectory tracking, and iterative modeling of localized micro-structures.
In zones exhibiting simultaneous risks of loss and influx, geomechanical modeling was conducted to define accurate three-pressure (pore pressure, fracture pressure and collapse pressure) profiles. This enabled the optimization of wellbore architecture and precise control of equivalent circulating density (ECD), mitigating potential risks.
In regions with overlapping water injection and development targets, SETC deployed intelligent completion technologies—including open/close sliding sleeves for cementing and casing externally mounted fiber optic sensors—to effectively manage post-production high water cut issues.
This integrated technical approach not only enhanced reservoir contact and drilling efficiency but also improved long-term production performance, setting a benchmark for complex well operations in multi-layered development areas.
The platform is situated in a multilayered, composite development zone with well-developed target sand bodies. However, the individual pay zones are relatively thin—averaging approximately 2.5 meters—and are further complicated by complex vertical oil-water relationships and the presence of natural fractures, posing significant operational challenges.
To address these complexities, precision coring was conducted in a new pilot well, enabling accurate identification of the optimal target interval. Leveraging its proprietary geosteering technology, SETC significantly improved reservoir contact. As a result, the reservoir uncover rate was increased by 5% compared to offset wells located in areas with thicker pay zones (>5.0 meters), demonstrating the effectiveness of SETC’s integrated technical strategy in challenging reservoir environments.
To address the geological complexity and stimulation challenges of the platform, SETC implemented a tailored fracturing strategy that incorporated an intelligent completion system featuring cemented sliding sleeves and external casing fiber optics. The cemented sleeves achieved a 100% successful activation rate, while the fiber optic system enabled real-time monitoring of both fracturing effectiveness and production profiles.
Following the well’s production start-up in March 2024, water cut levels remained within acceptable ranges. By the end of the year, the average daily oil output exceeded that of offset wells by more than 15%. This integrated technology has since been broadly deployed in similar waterflood overlay regions, delivering notable improvements in single-well productivity and operational cost efficiency.