TOPICS OF INTEREST
Reservoir-on-a-Chip Technology Opens a New Window Into Oilfield Chemistry
An oil and gas startup has attracted the business with a major operator thanks to its ability to forecast whether production-enhancing chemicals will work as advertised.
The evolution of horizontal drilling and multistage completions has changed matrix stimulation from the “more acid, better result” belief to effective lateral distribution and deeper penetration with less acid.
Accidental Discovery: Bitumen Pellets for Heavy Oil Transport
Researchers at the University of Calgary have developed a solid pellet that can transport bitumen and heavy oil by railcar instead of pipelines.
Enhancing Well Performance by In-Stage Diversion in Unconventional Wells
With multistage operations becoming the industry norm, operators need easily deployable diversion technologies that will protect previously stimulated perforations and enable addition of new ones. This paper reviews several aspects of the use of in-stage diversion.
Tight formations are candidates for hydraulic fracturing as the default. However, the solubility of carbonate by various chemicals provides opportunities to extend the well drainage radius effectively without the intensive equipment, material, and infrastructure demand of hydraulic fracturing.
Management: Chemical EOR—A Multidisciplinary Effort To Maximize Value
The implementation of chemical EOR has proven successful but the method faces significant technical and financial challenges.
Squeeze Treatments Combat Scale Deposition
At the 2017 SPE Oilfield Chemistry Conference, an assistant professor from Heriot-Watt University discusses the optimization of squeeze treatments delivered by diving support vessels.
Preventing Emulsions by Mitigating Solids
Approaches to integrated investigative testing and root cause identification are discussed to prevent solid emulsions from stabilizing to impair flowlines and other field infrastructure.
Positron-Emission Tomography Offers New Insight Into Wormhole Formation
Polymer gel is frequently used for conformance control in fractured reservoirs, where it is injected to reside in fractures or high-permeability streaks to reduce conductivity. This paper discusses the behavior and blocking capacity of gel during chase waterflooding.
In the past decade, analytics in the oil field has grown to be a major discipline, integrally supporting the application of many different types of production chemicals and becoming viewed by some as a technology differentiator.
Scaling Up Smart Water
For nearly a decade, Saudi Aramco has been studying how altering the chemical makeup of seawater injected into its reservoirs can increase production. The result is "smart water" that can boost the sweep effectiveness of a waterflood.
The Importance of Scale-Inhibitor Analysis—A State-of-the-Art Overview
This paper presents a state-of-the-art review of scale-inhibitor-analysis techniques and describes how these techniques can be used to provide cost-effective scale management.
Time-Resolved Fluorescence for Real-Time Monitoring of Scale and Corrosion Inhibitors
This paper describes a novel method of chemical dosage based on time-resolved fluorescence (TRF) that allows a simple, accurate, and efficient quantification of chemicals below parts-per-million ranges, even for double (scale/scale, scale/corrosion) quantification.
Deep-Sea Laser Raman—Developments for In-Situ Chemical Analysis and Applications
The deep-ocean Raman in-situ-spectrometer (DORISS) instruments were developed for the purposes of identifying compounds and studying in-situ chemical reactions in a nondestructive manner while working with solids, liquids, and gases.
Biocide Treatment Program Reduces Premature Coiled Tubing Failures
A study done to find the root cause of coiled tubing string failures in Montney indicated microbial-induced corrosion, leading the CT service provider to create a biocide treatment program.
A New EOR Concept From Shell To Enhance Waterflooding
Part of what makes DME an intriguing EOR technology is that it is soluble in both water and oil—with a preference for the latter. Shell’s plan is to add DME to the waterflooding stream to reach a concentration of about 16%, the upper limit of its dissolvability.
Chemical Sand Consolidation: Developing a Strategic Capability Across a Wide Portfolio
Chemical sand consolidation works by pumping chemicals downhole to strengthen the formation and stop sanding. In most cases reported in the industry, chemical consolidation has been used in short production intervals (less than 100 m).
Balancing Artificial Lift, Chemical Injection To Achieve Production Goals Over Life of Well
Production engineers are often asked to manage both the artificial lift (AL) system and the upstream chemical injection program for a project.
The removal of mineral scale in the oil field is typically perceived as a somewhat nonscientific discipline.
Scale Inhibitor Works To Prevent Reprecipitation of Calcium Sulfate
Calcium sulfate (CaSO4) in the form of gypsum and anhydrite is one of the more prevalent evaporite minerals typically found in the carbonate rocks of the western Canadian sedimentary basin (WCSB).
Sulfide-Scale-Formation and -Inhibition Tests for a Gas-Condensate Field
This paper describes various sulfide inhibitor-testing techniques that have been applied to candidate products for the management of zinc sulfide (ZnS) and lead sulfide (PbS) in a gas/condensate field with a known relatively severe ZnS/PbS scaling problem.
FeS-Scale Cleanout With High-Pressure Coiled Tubing and Tailored Fluid
The gas-producing carbonate zones of the Ghawar field in eastern Saudi Arabia have been affected by extensive iron sulfide (FeS) scale deposition, reducing overall gas production and increasing risks during well interventions.
Kinetics and Inhibition of Ferrous Sulfide Nucleation and Precipitation
Ferrous sulfide (FeS) precipitation increases during shale-gas and -oil production because of increased biologically and thermally induced sulfide production. Although FeS scale is abundant, little is understood about its precipitation and inhibition properties.
Sulfide/Calcium Carbonate Scale Coprecipitation
Mixed carbonate-/sulfide-scale problems have been reported when water is produced from carbonate reservoirs. This study presents interactions of lead sulfide and zinc sulfide coprecipitating with calcite.
Critical to success is the accurate testing in the laboratory that best approximates field conditions.
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04 February 2019
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