IPTC-17828-MS International Petroleum Technology Conference, 2014
Integrated Sand Management Strategy Development: Kinabalu Field
The mature Kinabalu oilfield is currently producing 18,000 bopd from a peak of 40,000 bopd in 1998. Field rejuvenation plans include drilling and completing new infill and development wells from both the existing platform and a new platform. Most platform wells are currently producing sand and none have been completed with sand control. Although current levels are less than 10 pptb, sand production has caused erosion issues and lost production due to the need for regular separator clean outs on the existing platform. Sand production is therefore a key risk factor for both existing well integrity and new well completion design. An integrated, practical and pragmatic sand management strategy was developed founded on establishing the causes of sand production, predicting the conditions for sand failure, and ranking both passive and active sand control options.
SPE 139697-PP CO2 Capture Conference New Orleans – 2010
Workflows & Considerations for CO2 Injection in a Highly Depleted Gas Field in the Southern North Sea. (Also presented at OMC and OE 2011)
This paper presents a workflow for injection of CO2 into depleted gas fields, addressing all the issues associated with this type of complex multidisciplinary project. These include; obtaining accurate predictions of phase behaviour, density, viscosity and hydrate formation providing an overview of the key aspects regarding CO2 properties and impact of delivery pressure and temperature versus reservoir pressure. Wellbore design issues are also presented such as optimising injectivity, sizing of tubulars and metallurgy selection in order to ensure both injection performance and integrity. Modelling CO2 in the reservoir is also discussed considering the near wellbore effects (cooling and ice / hydrate formation) as well as reservoir capacity and long term storage site integrity. Finally, short and long term monitoring issues are identified and the benefits and limitations of the various options are discussed. With respect to CO2 storage, the issues and associated mitigation measures from a capacity, injectivity and integrity standpoint are not insignificant. Modelling of CO2 injection, through wellbores and throughout the reservoir, is still in its infancy and, while a significant amount of work has been done with respect to modelling discrete components of this, a standardised workflow has not been developed that accounts for all aspects of a Carbon Capture and Sequestration (CCS) field development plan from well design, injectivity, storage, integrity and monitoring.
SPE 108586 Offshore Europe – 2007
Integrating Quantitative & Qualitative Reservoir Data in Sand Prediction Studies: The Combination of Numerical & Geological Analysis
The methodology for predicting sand production is in general constant across the industry. That is the determination of formation strength and field stresses and the application of them to a failure model. However, the variety of models available and their applicability and accuracy can be confusing with the results not always representing what is experienced under production conditions. This paper introduces a more holistic approach to sand production prediction which not only utilises numerical analysis, but also includes a qualitative approach using geological information.
SPE 97956 International Formation Damage Symposium Lafayette – 2006
Recent Advances in Granular Based Sand Control Design Operations and their Performance Evaluation
Sand control operations and particularly those using granular filter media such as gravel packs and frac & pack are being carried out in increasing numbers and in more demanding environments. Improvements continue to be made in terms of equipment, fluids and operations. However, with the increasing emphasis on well productivity and minimizing impairment, it is clear that a better understanding of some of the current causes of impairment is required. Abstract Sand control operations and particularly those using granular filter media such as gravel packs and frac & pack are being carried out in increasing numbers and in more demanding environments. Improvements continue to be made in terms of equipment, fluids and operations. However, with the increasing emphasis on well productivity and minimizing impairment, it is clear that a better understanding of some of the current causes of impairment is required. This paper presents the results of research work that have successfully resulted in an analytical tool and a new granular system that allows improved design and evaluation of sand control operations. A system for the determination of grain size and pore blocking mechanisms on a foot-by-foot basis has been developed.
SPE 95325 Offshore Europe – 2005
North Sea Hannay Field Case History: Perforating through a Cased-Hole Gravel Pack to Significantly Increase Oil Production
The Hannay field is located in Block 20/5c of the North Sea, approximately 150 km Northeast of Aberdeen. The development consists of two subsea producers tied back to Buchan via a 13.5 km pipeline. The production mechanism at Hannay is depletion with significant aquifer pressure support. The Hannay Field commenced production from a horizontal subsea well (Hannay 1) at an initial rate of 18,000 stb/day. However, the initial months saw approximately 9 tonnes of sand production transported into the production separators. In an attempt to mitigate sand production, the well was flowed below 10,000 BFPD.Reduced flow rates from the Hannay 1 well provided economic justification for a second producer.Hannay 2 was drilled approximately 1 year after field start-up.Due to sand production from the Hannay 1 well and sensitivity to water-based gravel pack fluid, it was necessary to complete the well with a cased-hole gravel pack.The installation of the gravel pack resulted in a large skin of 100. Acid was used to reduce this skin to approximately 50; however, the Hannay 2 productivity still remained significantly impaired. This paper presents the engineering studies conducted to evaluate and justify the perforation of the gravel pack in the Hannay 2 well to reduce well damage.
SPE 91000 Sand Management Network 1st European Forum – 2004
Geomechanical Performance of the Espoir Field
ESP Roundtable, Houston – 2001
Sub-Surface Safety Systems for Coiled Tubing Deployed ESP’s
ESP Roundtable, Houston – 2000
Recent Advances in Coiled Tubing Deployed ESP’s
This paper presents recent developments in Coiled Tubing (CT) completion systems using standard and inverted configurations of ESP’s with an internal power cable. In the past, various systems utilised modified well intervention equipment as surface and subsurface components for CT / ESP completions. All existing installations with power cable inside the CT string also utilise inverted pumps. Inverted pumps were developed to be used with the Cable Deployed Pumping System (1). Due to the inherent design limitations and field problems encountered (2,3,4) with this type of system an alternative approach was taken to design new systems that take full advantage of CT technology. Recent developments include purpose designed and built surface and subsurface assemblies, including a production spool featuring a non-enclosed type hanger without lock down screws. A non-permanent, non-damaging cable suspension system has also been developed. Suspension is based on a friction concept and is provided in such a manner that cable movement is permitted (but minimised) and no damage or indentation is caused to the CT either internally or externally. The subsurface components allow integration of conventional or inverted pump assemblies and the CT / cable assembly. This paper describes in detail the new systems and their components
SPE 56948 – Offshore Europe – 1999
Solving Sanding Problems using a Sand Management System – Case Histories