Reservoir Operation

Produced-water (PW) management in the Permian Basin faces tightening injection constraints, induced seismicity concerns, and volatile saltwater-disposal (SWD) costs. At the same time, chemistry-rich PW contains dissolved constituents (e.g., Li, B, Sr) that may be valorized i SWD f recovery performance and market conditions support favorable techno-economics. Here, we develop an integrated decision...

More than 200,000 horizontal multifractured wells are currently active across multiple unconventional basins in continental United States. The first completion designs relied on completion practices that had been utilized in conventional reservoirs, and the early wells completed with low proppant/fluid intensity and in many cases cluster/fracture spacing greater than 100 ft. Chlorine Dioxide (ClO₂...

Employing water injection is a widely utilized method to sustain continual oil recovery from reservoirs. This involves maintaining reservoir pressure, managing the oil rim, and facilitating the movement of oil from injection wells to production wells. Given that many water injection facilities still heavily depend on manual operation, automating the injection process emerges as a crucial strategy...

Being able to calculate and predict the inflow performance from a well is critical in designing any form of artificial lift. The production/lift capability of whatever form of artificial lift chosen should closely match the current and future inflow performance of the well for the economics of the investment to be the highest.

Inflow performance estimation is also required to ensure that...

In mature oil fields, the success of gel treatment results depends on the ability of the gel to reduce the high permeable formation without damaging to low permeable formation. Formation damage refers to the extent of damage reservoir rocks face from various drilling techniques and/or chemical treatment during well completion. A dynamic filtration test was used to investigate this effect using...

Environmental concerns and increasing costs are creating a need for a polymer that will allow the use of a high salt, high hardness water in the making of a viscosified frac fluid. Any new polymer would also need to tick the boxes for cost, rheology, HS&E characteristics as well as breaking in the reservoir. Past development efforts have focused on improving organic-based polymers. A new approach...

Multiphase flow is found in various places both in nature and in practice, however, multiphase flow is prevalent in the petroleum production industry. This phenomenon brings about a major problem of pressure loss in piping systems and results in a loss in production. Multiphase flow has been studied for years however, with the increase in unconventional engineering methods, there is now a greater...

Water block after hydraulic fracturing is one of the major challenges in shale oil recovery which affects the optimal production from the reservoir. The water blockage represents a higher water saturation near the matrix-fracture interface, which decreases the hydrocarbon relative permeability. The removal of water blockage in the field is typically carried out by soaking the well (i.e., shut-in)...

Because the flow regimes and drainage geometry of horizontal well are different from those of vertical wells, there is a need to develop a distinct analytical Productivity Index (PI) solution for horizontal well.  There have been several researches in the early 1990's  developing the solutions; however, each solution generates different PI values.  The degree of disparity depends on how...

The fault effects on the build-up pressure distribution of oil wells were investigated by using numerical and analytical approaches. The limitations and benefits of analytical and numerical solutions of the build-up test were listed in the research. The effects of reservoir boundaries on well responses by using analytical solutions were analyzed. Schlumberger software package “ECLIPSE” was used...