Huff’n Puff EOR Optimization by using different cyclic gases in unconventional shales

Temizel, Cenk
Canbaz, Celal Hakan
Aydın, Hakkı
Kudrashou, V.
Wu, J.
Haeri, F.
Unal, Y.
Nurlybayev, N.
Increasing global trend of unconventional production impelled the oil and gas companies to adapt the EOR mothods to unconventionals to increase the recovery. In this study, a deep review of cyclic gas (Natural Gas, CO2, N2) injection processes and the methodology to apply in unconventional shale reservoirs is described by investigating all the geological, petrophysical, production and reservoir engineering aspects. The significance of each uncertainty and control variable throughout the process is outlined. A full-physics commercial simulator is used to identify the significance of control variables, and also the level of uncertainty which are directly affecting the production and recovery functions. The challenges encountered during implementation of cyclic gas injection processes are outlined in order to provide a comprehensiveand practical implementation perspective rather than only theoretical or a simulation work. Besides, the theory, advantages, drawbacks, benefits are given in details. Results of real cases are being compared and matched with the simulation results. The study indicates the incremental advantages of appliying huff`n puff process in unconventional shale reservoirs by comparing the primary production performance with the performances of cyclic injection cases that uses various gases. Key factors that directly affect the reservoir, completion and operational attitudes are circumstantially given to technically handle a successful project in a feasible way. In the model, the objective function is built by considering the economic parameters to help NPV maximization in a realistic perspective. S-curves and tornado charts is used to visualize the results and illustrate the significance of parameters and ranges of the developed probabilistic economic model. The effect of huff`n puff method and how a successful cyclic injection gives better recovery and feasibility results is clearly shown. Petroleum literature includes several studies related to cyclic gas injection. However, these works are either only focus on the simulation/theoretical parts or only includes a case study that focuses reservoir/production analysis. This comprehensive study closes the gap aims to be a reference by including a deep look into details of the theory and combines it with real field cases and solutions by clearly describing the candidate selection, modeling, physical parameters/key factors, economics, and success stories.
21st European Symposium on Improved Oil Recovery IOR (19-22 April 2021)


Investment needs for climate change adaptation measures of electricity power plants in the EU
Lise, Wietze; van der Laan, Jeroen (2015-10-01)
Climate change is expected to have impacts on the power sector, leading to, among others, a need for adaptation measures in the sector in the near future. This paper analyses the need to adapt to climate change impacts for power generation technologies in Europe until 2100. Europe is broadly divided into four geographic climate zones, for which regional climate change impacts are quantified with the help of the ENSEMBLES RT2b data. The European future technology mix is based on two Eurelectric energy scenar...
Candidate selection process for polymer gel application by using artificial neural networks
Örs, Oytun; Sınayuç, Çağlar; Department of Petroleum and Natural Gas Engineering (2017)
Rapid increase in water-oil ratio has been one of the most important challenges of the oil companies that are producing from the mature oil fields. For this reason, various studies have been conducted to diminish the excessive water production. One of the most widely used chemical shutoff technique, polymer gel treatment, involves injection of different polymers into the production wells in order to plug the easy flow pathways of the excessive water. For the successful application of the polymer gel treatme...
Life cycle assessment of off-highway trucks and belt conveyors for sustainable mining
Erkayaoğlu, Mustafa; Demirel, Nuray; Department of Mining Engineering (2011)
In recent years increasing growth rate of all industrial fields generated an emerging energy demand and consequent environmental problems worldwide. Defining environmental profiles of products and systems using environmental tools, such as Life Cycle Assessment (LCA), is a critical issue for sustainable mining. In order to tackle the increasing environmental challenges and air emissions induced by surface coal mining, alternative material handling options are needed to be evaluated. This research study aims...
PHPA as a frictional pressure loss reducer and its pressure loss estimation
Ercan, Can; Özbayoğlu, Evren; Department of Petroleum and Natural Gas Engineering (2007)
As the demand of oil and gas is increasing, using the existing reservoirs more efficiently as well as searching for new reservoirs is mandatory. Most undiscovered reservoirs are in deep or ultra-deep offshore locations, where drilling to such targets are very difficult with the available fluid circulation technology, since there exists a significant frictional pressure loss due to extreme long wellbores. In order to reduce the frictional pressure losses inside the drillstring, frictional drag reducers are u...
Stochastic processes adapted by neural networks with application to climate, energy, and finance
Giebel, Stefan; Rainer, Martin (Elsevier BV, 2011-10-01)
Local climate parameters may naturally effect the price of many commodities and their derivatives. Therefore we propose a joint framework for stochastic modeling of climate and commodity prices. In our setting, a stable Levy process is drift augmented to a generalized SDE. The related nonlinear function on the state space typically exhibits deterministic chaos. Additionally, a neural network adapts the parameters of the stable process such that the latter produces increasingly optimal differences between si...
Citation Formats
C. Temizel et al., “Huff’n Puff EOR Optimization by using different cyclic gases in unconventional shales,” Online Event, 2021, vol. 2021, p. 1, Accessed: 00, 2021. [Online]. Available: