Cover: Oilfield Review Spring 1999
(0.17 MB PDF)
Editorial: An Operator's Perspective on Articial Lift
(0.02 MB PDF)
Some reservoirs are impossible to see in conventional compressional-wave seismic images, but are clearly imaged on surveys that blend information from shear and compressional waves. A new, seafloor acquisition system captures data from both wave types and establishes the viability of this technique offshore. Case studies show that, in addition to better imaging, combining the two types of wave data provides better interpretations of reservoir lithology variations and helps identify fluid contacts and properties.
The quality and integrity of primary cement jobs often determine how long wells will produce without requiring repair. Slurry properties, including rheology, fluid loss, pumpability and thickening time, traditionally clashed with mechanical properties of hardened cement, such as compressive strength, porosity and permeability. New technology optimizes both slurry and set-cement properties simultaneously while reducing cost and risk, even under difficult operating conditions and in harsh environments.
From first completion, the process of monitoring, diagnosing and intervening can ensure well viability and productivity. Experienced personnel and the latest technology have been committed to identify and solve production-related problems economically. We discuss developments in production logging and interpretation through several field examples. Remedial solutions, including through-tubing casing-patch technology, perforating techniques and innovative combinations of production logging and completion services, are also reviewed.
Subsurface equipment complexity, surface facility requirements and the energy needed to bring fluids to surface make high-rate lift expensive to install and operate. Selecting the right system is important because a single installation may produce as much as some small fields. Choosing suitable methods is even more critical when evaluated in terms of failure, downtime and intervention costs. This article reviews artificial-lift selection, design and optimization as well as technological advances in gas lift and electric submersible pumps.
Download file (2.20 MB PDF)
All pages in this issue
Download file (9.17 MB PDF)