A Practical Workflow for Offshore Hydraulic Fracturing Modelling: Focusing on Southern North Sea
- Hadi Parvizi (Teesside University) | Sina Rezaei-Gomari (Teesside University) | Farhad Nabhani (Teesside University) | Zohrab Dastkhan (Petroxin) | Wei Cher Feng (E.ON E&P UK)
- Document ID
- Society of Petroleum Engineers
- EUROPEC 2015, 1-4 June, Madrid, Spain
- Publication Date
- Document Type
- Conference Paper
- 2015. Society of Petroleum Engineers
- 2.5.4 Multistage Fracturing, 3.2.3 Hydraulic Fracturing Design, Implementation and Optimisation, 5.6 Formation Evaluation & Management, 5.8 Unconventional and Complex Reservoirs, 1.2 Wellbore Design, 3 Production and Well Operations, 3 Production and Well Operations, 2 Well completion, 5.6.4 Drillstem/Well Testing, 5 Reservoir Desciption & Dynamics, 5.3 Reservoir Fluid Dynamics, 1.2.2 Geomechanics, 5.3.4 Integration of geomechanics in models, 5.8.1 Tight Gas
- Integrated Study workflows, Southern North Sea, Tight Gas Reservoir, Hydraulic Fracturing, Natural Fracture High Perm Streaks
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The high prices of energy encourage investments in oil and gas research and development leading to new or improved technologies to recover more hydrocarbons from resources and re-evaluate the reserves. As a result of such technological developments and experience of job practices, hydraulic fracturing techniques have improved significantly in terms of designing and execution and this, at the same time, has made the process much more complicated. This paper suggests a practical multi-disciplinary workflow for hydraulic fracturing modelling mainly in tight gas sandstone reservoirs.
Hydraulic fracturing stimulations in costly environments such as the Southern North Sea require deeper insight into the chemistry and mechanics of the process, characteristics of the formation, and most importantly, the interactions during and after the stimulation job. Different sources of information and analysis such as seismic, reservoir static modelling, initial geomechanical modelling, initial hydraulic fracturing study, fracture initiation point analysis, 1-dimensional (vertical) stress modelling per frac, mini-frac, mainfrac, flowback analysis, well test analysis, and reservoir dynamic modelling are discussed in this paper. The key data cross checks are recognised and lessons learnt from industry are also incorporated to highlight the possible outcomes of different decisions.
Having more information, particularly from different disciplines, can be more productive only if a comprehensive guideline explains the essential elements of the required studies and illustrates their interrelations. This workflow has been the reference of a validated study for a multi-fracced tight gas sandstone reservoir in the Southern North Sea. The workflow has been deployed to organise and recognise the key elements that control the performance of hydraulically fractured wells in a heterogeneous environment. From the workflow, a thorough examination and analysis of available data were performed and fed into the static and dynamic models. As a result of the integrated workflow, a better understanding of the reservoir was formed and potential upside opportunities became visible.
This paper highlights the importance of integrated multi-disciplinary workflow required to detect, characterise and evaluate information from the field into a product that can be used to better understand hydraulic fracturing and tight gas sandstone reservoirs.
|File Size||1 MB||Number of Pages||14|