SPE International Oilfield Scale Conference and Exhibition
20-21 June 2018, Aberdeen, Scotland, UK
Number of conference papers: 49
20 June 2018
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Session 1: Sulphide Scale Formation and Control
Sulphide scales are an ever increasing challenge in the oil and gas production, with some more challenging than others to mitigate with chemicals. In addition, removal of sulphide scales can be extremely difficult, and as such there is a real need for industry focus for new understanding and technologies in this area. It is recognised that there is a knowledge gap in comparison to the more conventional scales, in the understanding of the scale formation, deposition and mitigation aspects. This session explores advancements made in the understanding of sulphide scale precipitation, deposition and mitigation, as well as chemical development methods, and the effect of testing in multiphase conditions and the potential of surface coatings in combating adhesion of scale.
Insights into the Mechanism of Lead Sulfide Pbs Fouling and The Influence of Light Distillate Fraction
190731-MS SPE Conference Paper - 2018View rights & permissions
New Generation Squeezable Sulfide Inhibitor Successfully Averts Challenging Sulfide Scale Deposition in Permian Basin
190709-MS SPE Conference Paper - 2018View rights & permissions
190743-MS SPE Conference Paper - 2018View rights & permissions
Session 2: New Inhibitor Test Methods and Molecules
This session recognises the ongoing scale inhibition challenges faced by production chemists and a desire to investigate new solutions to existing scale problems. Papers presented relate to a new test method and its applicability to specific field applications, performance of a new molecule to prevent calcium carbonate/sulphate scale whilst meeting environmental compliance (OECD306) and the evaluation, including field trial, of iron tolerance for a scale inhibitor used in conventional production and also fracturing completions.
190741-MS SPE Conference Paper - 2018View rights & permissions
Development of the First Readily Biodegradable OECD306 Phosphonated Amino Acid Chemistry for the Control of Calcium Carbonate and Calcium Sulphate in HTHP and UHT Unconventional Productions
190733-MS SPE Conference Paper - 2018View rights & permissions
Development and Field Application of an Iron Tolerant Scale Inhibitor for use in Fracturing Completions and Production
190728-MS SPE Conference Paper - 2018View rights & permissions
Session 3: Developments in Scale Predictions
This session gives an insight into the recent developments within scale predictions. Scale predictions are important tools to more accurately evaluate the scaling risk, design scale inhibitor treatments, and predict fresh water breakthrough. It is an essential tool to handle scale issues in increasingly harsher environments, such as ultra-high temperature, pressure and complex ion conditions. Challenges associated with the impact of very high calcium concentrations on sulphate scale predictions at high temperature is one of the focuses of this session; in addition, there will be an interesting presentation regarding the kinetic effects into the thermodynamic modelling of CaCO3 scale.
190737-MS SPE Conference Paper - 2018View rights & permissions
Impact of High Calcium Concentration on Sulfate Scale Prediction at High Temperature from 120°C to 220°C
190744-MS SPE Conference Paper - 2018View rights & permissions
190754-MS SPE Conference Paper - 2018View rights & permissions
Session 4: Produced Water Sample Handling and Analysis Methods
To prevent scale formation and deposition in oil fields reliably and cost efficiently, it is imperative to know the correct water chemistry throughout the production system and the level of protection provided by scale inhibitors used in scale inhibitor squeeze treatments. This session addresses these issues by presenting improved as well as new methods for analysing scale inhibitors returning from scale inhibitor treatments more accurately, a new methodology for determining formation water compositions contaminated with drilling mud filtrate and a review of sample preservation techniques.
190698-MS SPE Conference Paper - 2018View rights & permissions
190734-MS SPE Conference Paper - 2018View rights & permissions
Session 9: Knowledge Sharing Poster Session I
In addition to the papers which are presented at the conference, a number of additional papers are available and will be presented in poster format. These technical posters cover a wide range of topics and represent multiple demographic areas. Poster presenters will be available for questions and discussion at their designated session, spread over the coffee breaks. We hope you enjoy this additional opportunity for learning.
Scale Risk Assessment and Novel Coating for Smart Completion: Scale Simulation and CFD Modelling Approach
190730-MS SPE Conference Paper - 2018View rights & permissions
Recent Experience in Squeeze Treating Huff and Puff Wells for Control of Steamflood Generated Calcium Carbonate Scale
190701-MS SPE Conference Paper - 2018View rights & permissions
190748-MS SPE Conference Paper - 2018View rights & permissions
190742-MS SPE Conference Paper - 2018View rights & permissions
Unconventional Horizontal Scale Squeezes: Lessons Learned Drive Continued Development and Improved Cost Savings
190720-MS SPE Conference Paper - 2018View rights & permissions
Development of an UV-Vis Spectrophotometric Method for Accurate Determination of Aqueous Sulphides in Exotic Scale Studies
190702-MS SPE Conference Paper - 2018View rights & permissions
A Novel Evaluation of Scale Inhibitor Performance against Calcium Carbonate Scaling in the Presence of Iron Sulfide
190723-MS SPE Conference Paper - 2018View rights & permissions
190700-MS SPE Conference Paper - 2018View rights & permissions
Carbonate and Sulphide Scale Prediction Modelling in Auto-Scaling Processes: Procedure for the Calculation of Reservoir Fluid Compositions and Scale Profiles in Production Systems using Topside Data
190711-MS SPE Conference Paper - 2018View rights & permissions
190755-MS SPE Conference Paper - 2018View rights & permissions
190735-MS SPE Conference Paper - 2018View rights & permissions
Session 21: Keynote Session 1
Predicting the formation of pH-dependant scales such as carbonates and sulphides requires a full study of all hydrocarbon and aqueous phases present to determine the distribution and speciation of CO2 and H2S in the system. Several commercially available software packages combine PVT calculations with scale predictions but packages more targeted to aqueous systems have limited hydrocarbon capabilities. Likewise, PVT modelling software focusing on the hydrocarbon phase does not always fully model the aqueous phase or can only predict a limited number of scales/complexes. Moreover, within each software a large number of different Equations of State (EOS), activity models, parameters etc. which ultimately impact the final carbonate and sulphide scale prediction profile can be selected by the user. The results to be presented will show that despite the large number of modelling options available, there are two parameters that play a key role in pH-dependant scale predictions: partition coefficients of CO2 and H2S between gas, oil and water and the relative mole (and volume) distribution between each phase at selected temperature and pressure. The final scale prediction results can be accurate only when these values are accurate, irrespective of how they are obtained.
190726-MS SPE Conference Paper - 2018View rights & permissions
Session 22: Keynote Session 2
Produced water from the Bakken and Three Forks formation in the Williston Basin is notably high in total dissolved solids, which leads to many well maintenance issues related to halite scaling. Freshwater is widely used to prevent halite scaling; however, an efficient and practical halite scale management program is highly desirable to manage operation and maintenance costs. The programme includes identification of wells that need freshwater injection; optimisation of the fresh water volumes; minimising deferred oil production; and preventing other scales associated with the presence of fresh water in the wellbore. Developing a reliable scaling prediction model was challenging due to inconsistency of produced water composition of individual wells, limited reservoir fluid composition data and high sensitivity of halite scaling risk to slight changes of halite saturation index. The output of this study resulted in optimising both freshwater and chemical treatment programs to minimise halite scaling. Significant cost savings have been achieved from reduced freshwater usage, thereby resulting in lowered produced water disposal. Continuous freshwater injection systems were proven to actively control the ratio of freshwater to production water and achieve additional cost reductions.