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Performance and Design of Water Injector Wells Requiring Sand Control

10 – 12 September 2013

San Diego, California | Bahia Resort Hotel

Technical Agenda

Tuesday, 10 September, 0800-0830

Chairpersons’ Welcome

George Wong, Shell and Dave Norman, Chevron


Session I: Water Injector Performance Results–Gulf of Mexico

Chairs: Bill Begnaud, BHP Billiton; Rodrigo Murillo, BP

Successful water injection is fundamental to the success of many of the development projects in deepwater Gulf of Mexico. Issues with deepwater Gulf of Mexico water injection wells involving rapid injectivity decline, out of zone injection, and limited longevity have plagued many of these developments. The root cause(s) may not be fully understood. The various sandface designs, plugging scenarios, failure aspects, operational practices, performance analyses, potential downside mitigations, and other related topics will be addressed in this session. Views on how to approach these challenges will be sought in this group discussion.


Session II: Water Injector Performance Results–Africa

Chairs: Tim Ellison, ExxonMobil; Dave Norman, Chevron

Most of the new fields in West Africa are developed in deep water weak sands, and their ultimate recovery often relies on voidage replacement through water injection. This session will discuss the challenges related to long-term injection performance in typical West Africa reservoirs with a high cost/high stakes environment.


Session III: Water Injection Projects for Other Areas of the World

Chairs: Bob Burton, ConocoPhillips; Mario Germino, Petrobras

Water injection projects and injection well design issues faced in projects outside the Gulf of Mexico and West Africa will be discussed. This session will review the use of open hole gravel packs versus stand-alone screens and matrix bypass events, as well as other injection issues.


Session IV: Water Injection Containment Design and Assessment

Chairs: Bob Burton, ConocoPhillips; Dave Norman, Chevron

Loss of injection fluid containment through inadequate wellbore integrity or loss of the cap rock seal is a major risk for water injection projects worldwide. Design guidelines and regulatory requirements are evolving. A number of key uncertainties exist:

  • How do we assess well integrity risk?
  • How do we assess caprock integrity risks?
  • What data do we need to collect to adequately assess risk?
  • How can we reliably evaluate geotechnical data prior to project start-up?

This session will discuss how different operators evaluate injection integrity risk and determine safe operating limits on bottomhole injection pressure (BHIP) to prevent out of zone injection and loss of containment.

Wednesday, 11 September, 0800-0930

Session V: Water Injector Sand Control Design Needs

Chairs: Rodrigo Murillo, BP; Mehmet Parlar, Schlumberger

This session consists of presentations from operators discussing sand control design challenges in water injectors and potential solutions that are ready to be implemented.


Session VI: Produced Water Reinjection

Chairs: Herbert Lescanne, Total; Mukul Sharma, University of Texas

Due to the current evolution of environmental regulations and operator company rules, the percentage of produced water that is re-injected in the reservoir or injected in disposal wells is increasing and will continue to do so in the coming years. The type of injected fluid (i.e. produced water versus treated sea water, surface water or aquifer water) may impact how the injector completions are designed, how the injector wells are operated, and how they perform in terms of injectivity and flow conformance. These impacts will be presented and discussed during the session.


Session VII: Restoration of Injectivity

Chairs: Tim Ellison, ExxonMobil; Erik Wennberg, Statoil

Declining injectivity during the injector life is a common problem. The problem is difficult for completions in weak sands, and is occurring with increasing frequency that can lead to failure of the well. Injection problem mitigation may range from simple changes in operating strategy to costly procedures such as side-tracking or a complete re-drill. The session will include case study examples that exhibit declining injectivity, discuss the postulated mechanisms of that decline, and present the solutions that have been implemented to address that decline.


Session VIII: What is New in the Marketplace?

Chairpersons: Alison Foo, Halliburton; Mehmet Parlar, Schlumberger

This session contains presentations from service companies discussing new products and services that they are ready to introduce to the marketplace.

Thursday, 12 September, 0800-0930

Session IX: Water Injectivity Monitoring Panel

Chairs: Alison Foo, Halliburton; Herbert Lescanne, Total

Monitoring of water injectors is important for predicting their future performance, diagnosing possible anomalies in their behavior, and planning the necessary remedial operations such as well interventions, workovers, or additional wells. This session will cover not only the technologies involved in monitoring injectivity and conformance of water injectors but also the interpretation of the obtained data and its impact on decision making. These technologies include flow metering, down-hole pressure gauges, distributed temperature sensing, and real time surveillance.

This session will be in a panel discussion format.


Session X: Wrap Up

Chairs: Dave Norman, Chevron; George Wong, Shell