Cover  Download file (404 KB PDF)
 |
Contents
Introduction
Accurate reservoir evaluation and maximum, cost-effective exploitation are major goals for asset teams. Real-time drillbit steering; logging tools for real-time evaluation of formations, wellbore fluids, and flow characteristics; high-integrity cement systems; and completion equipment are all important factors in achieving these goals. Technology introduced into the oil and gas fields of the region is answering today’s challenges.
Download file (137 KB PDF) |
New Power in Production Logging
Locating the zones where fluids enter the wellbore in a producing or injecting well is an important aspect of production logging. It is relatively straightforward to establish flow profiles in single-phase situations, but multiphase systems present a greater challenge to quantifying gas and liquid holdups.
Download file (679 KB PDF) |
Focus In on Fluids
Obtaining representative samples of reservoir fluids is a major challenge in reservoir engineering, particularly in the complex carbonate reservoirs of the Middle East. Reservoir studies, crucial to production planning and process design, determine and utilize reservoir fluid properties, pressure-volume-temperature behavior, viscosity, and gas/oil ratio, on the basis of a reservoir at its original conditions. A sample free of contamination and contained at its downhole PVT conditions when it reaches the surface gives confidence in the analyses that follow.
Download file (1.04 MB MB PDF) |
Multiple Questions and Intelligent Answers
Multilaterals are effective in complex carbonate reservoirs but have been slow to develop because of general skepticism about the risks and more practical deterrents. One solution is a prefabricated subsurface wellhead assembly that can be unwrapped and installed downhole, splitting the main bore into two equal-size lateral bores and providing a high-pressure seal at the junction.
Download file (1.88 MB PDF) |
Moving in the Right Direction
Knowing whether a boundary is being entered from above or below takes away a lot of the guesswork for drillers and geologists, and the ability to react immediately is of great value to the geosteering engineer. Adding an azimuthal capability to resistivity and gamma ray LWD tools enables real-time measurement in a number of equally spaced sectors around the borehole. Increased sensitivity allows detection of features that would have remained unseen using conventional methods.
Download file (422 KB PDF) |
Cracking the Carbonate code
The complexity and unpredictability of carbonates have frequently frustrated geologists, geophysicists, petrophysicists, reservoir engineers and drillers alike. Advances in areas such as wireless telemetry and real-time electronic imaging have contributed to the range of formation evaluation-while-drilling tools.
Download file (1.54 MB PDF) |
Hard and Fast—The Cement Challenge
In some areas of the Middle East zonal isolation is particularly difficult to achieve in tophole sections. The optimization of cement slurry to take account of the difficulties presented by formations, borehole conditions, and wellbore fluids, and to produce a set cement with the necessary mechanical properties is a complex business.
Download file (486 KB PDF) |
| Authors Download file (160 KB PDF) |
