SPE Workshop: North Sea and Europe Area Stimulation 7 - 8 Nov 2017 The Hague , The Netherlands


Tuesday, November 07

08:50 - 09:00
09:00 - 09:30
Keynote Speech
Speaker(s) Hans-Henrik Kogsboll, Maersk

Stimulation is the cheapest and easiest way to get increased production! This talk will take you through the development and improvements to well stimulation technologies and the important link between well stimulation and the selection of completion method. Over the years oil & gas developments have moved to less and less permeable and productive reservoirs requiring increased area for inflow and cheaper completion and stimulation technologies for the developments to be economical attractive. This talk will address developments of horizontal well stimulation and completion technologies applied in the Danish North Sea fields Dan and Halfdan over the last 3 decades. In conclusion it will address the need for continuous improvement and diligence in the benefits and consequences of well stimulation.

09:30 - 10:30
Session 1: Stimulation in Tight-Gas Sands
Session Chairpersons Lars van Zelm, Wintershall NL; Josef Shaoul, Fenix Consulting Delft

Tight gas well stimulation has a long and sporadic history in the North Sea and Europe and it is still far from being an easy development option in the current economic climate. Onshore, the pause in activity in Germany continues, but there appears to a light at the end of the tunnel, after recent new legislation has been passed. In Poland and Hungary, activity has fallen sharply, but there has been renewed interest in offshore tight gas in the Dutch and UK sectors (stranded gas). In addition to new field development, there is also potential development of tight gas horizons within existing fields. The economics of such developments are much more attractive than standalone tight gas projects, although there are often operational issues that need to be considered.

This session will examine recent developments in tight gas stimulation, both onshore and offshore, and focus on case studies. The emphasis will be building on the recent experience to push the envelope of tight gas stimulation practices.


Session talks include:

"Challenges of stimulation of producing tight gas wells", ONE
"Centrica stimulating in the SNS Chiswick Field: A brief history and forward planning for the 5th well in 2018", Centrica

10:30 - 11:00
11:00 - 12:00
Session 1: Stimulation in Tight-Gas Sands Continued

Session talks include:

"Fracture Stimulation Challenges in Stranded Reservoirs and Thin Reservoirs", Shell NAM
"Andrew Field Life Extension via Hydraulic Fracturing", BP

12:00 - 13:00
13:00 - 14:30
Session 2: Stimulation in Oil Fields
Session Chairpersons Bjorn Berntsen, Faroe Petroleum; Mark Norris, Schlumberger

Chalk stimulation is the most mature of all stimulation practices in the North Sea. This session will review field stimulation techniques and results from major chalk reservoirs. Different stimulation strategies have been applied, using both acid and proppant. In this session, we will focus on case histories of all these different approaches.

Field design and operational issues will be discussed along with well productivity results. The discussion will also review how each operator determines the “best” stimulation technique for their reservoir. Topics in this session will include:

  • Acid stimulation in multi-lateral wells with advanced completions
  • Re-stimulation challenges in horizontal wells
  • Updates on chalk stimulation from Denmark and Norway


Session talks include:

"Stimulation Past and Present for Valhall", Aker BP 
"Multi-fracced horizontal well", Wintershall NL
"Brown Field Development in Romania using Stimulation", Expert Petroleum Romania


14:30 - 15:00
15:00 - 16:30
Session 3: Fracturing at Extremes
Session Chairpersons Neil Wood, Fracture Technologies; Bogdan Bocaneala, OPECS

This session will address new techniques and practices in the areas of stimulation in Europe for application in difficult well condition and locations, for example, high pressure, high temperature, and sub-sea wells. The focus will be on recent advances in fluids, equipment, and techniques applicable to these situations. This session will include:

  • Remedial fracturing treatments in HPHT reservoirs


Session talks include:

"Engineering an HPHT Remedial Hydraulic Fracturing Stimulation in Shearwater", Shell UK
"Harrier Field Development via the First Acid Fractured Subsea Dual Lateral in the North Sea", Schlumberger
"Refracturing with Ultra-High Temperature Frac Fluids", Schlumberger

16:30 - 17:00
18:00 - 21:00

Wednesday, November 08

09:00 - 10:30
Session 4: Completion Optimisation for Stimulation
Session Chairpersons Mark Norris, Schlumberger; Brett Reilly, Halliburton

The biggest enabler for making offshore tight reservoir development economic has been the use of multiple zone horizontal well stimulation. The original application of this technology by Maersk in the 1980’s required the use of a rig during the entire completion and stimulation process. Recent well developments focusing on tight-gas have been done with a variety of different completion technologies, each of which has different advantages and limitations. This session will focus on case studies of wells using different completion technologies to achieve rapid multi-zone stimulation, including the use of dissolvable balls and diverting agents.


Session talks include:

"Stimulation update at Maersk Denmark", Maersk DK
"Application of Channel Fracturing for high leak-off formations", Schlumberger/ MOL
"Multi-Laterla Stimulations - Transfer of Experience from North America to Europe", Packers Plus

10:30 - 11:00
11:00 - 12:30
Session 5: Maximising Recovery
Session Chairpersons Bogdan Bocaneala, OPECS; Lars van Zelm, Wintershall NL

Stimulation can be used in many different ways to maximize recovery in both new developments and existing fields. Case studies in this session will look at cases of hydraulic fracturing in situations that are not “tight” in the classical sense, but where stimulation was able to improve well and project economics by accelerating production or increasing reserves. This session will also include cases of using stimulation in mature fields to access bypassed reserves in tight formations, especially offshore.


Session talks to include:

"Stimulation at Gulfaks", Statoil
"Stimulation Potential in Mature North Sea Oil Fields", Fenix Consulting Delft

"New stimulation projects offshore Norway", AkerBP 

12:30 - 13:30
13:30 - 15:00
Session 6: Onshore Fracturing
Session Chairpersons Daryl Johnson, Carbo Ceramics; Martin Rylance, BP

In spite of recent problems with regulatory agencies and public opinion, there continues to be a limited amount of on-shore stimulation activity in Europe. This session focuses on case studies of recent activity, such as:

  • Stimulation of mature/depleted moderate permeability gas reservoirs
  • Stimulation on-shore UK


Session talks to include:

"Stimulation fluid tracing – a tool to evaluate stimulation performance" - Restrack

"Novel Proppant Consolidation System Moves From Deepwater to Onshore For Stimulation and Sand Control" - Carbo Ceramics 


15:00 - 15:30
15:30 - 17:00
Session 7: New Materials and Techniques
Session Chairpersons Daryl Johnson, Carbo Ceramics; Neil Wood, Fracture Technologies

Recent developments in the materials used for stimulation, such as proppant, fluids and completion hardware, will be covered in this session. This session will include case studies on:

  • Use of tagged proppant to monitor diversion effectiveness
  • Use of abrasive jetting for fracturing applications


Session talks to include:  

"Novel traceable proppant application to assess new fracturing technique diversion efficiency", Carbo Ceramics
"Abrasive Slotting From Yard Testing to Field Deployment", BP Russia
"Selecting a Horizontal Candidate in the Black Sea for a Re-Frac with Flow Diverting Technology", Halliburton

17:00 - 17:30