Lessons Learned from the First Miscible CO2-EOR Pilot Project in Heterogeneous Carbonate Oil Reservoir in Abu Dhabi, UAE

Al-basry, Ali Hassan; Al-Hajeri, Salma Khalfan; Saadawi, Hisham; Aryani, Fatema Mohamed Al; Obeidi, Adel A.; Negahban, Shahin; Bin-dhaaer, Ghaniya Salim

doi:10.2118/142665-ms

Cited by 22 publications

(8 citation statements)

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“…ADCO CO 2 -EOR pilot plant is using miscible CO 2 flooding because it is located in an area where the carbonate reservoir is above Minimum Miscibility Pressure (MMP) of CO 2 [42]. Since the objective of any CCS project is to decrease the total amount of CO 2 emitted in the UAE, immiscible CO 2 flooding could be a better option.…”

Section: "Second Generation" Co 2 -Eormentioning

confidence: 99%

Cost Effective Strategies to Reduce CO2 Emissions in the UAE: A Literature Review

Wahedi¹

2013

Ind Eng Manage

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Post combustion CO 2 management optionsPost combustion CO 2 capture involves the removal of CO 2 from the flue gas produced by the combustion of fossil fuel. The different technologies investigated for this process are presented in Table 2 [3-6].The three first strategies (Biological, Membrane and Adsorption) are still in the developmental stage. All these technologies need to be evaluated when choosing the best one to incorporate in a power plant to be built in the future. The only immediately realizable and mature CO 2 capture technology appears to be chemical absorption [5,6]. Post combustion CO 2 capture by absorptionIn a typical Absorption/Stripping unit, carbon dioxide is first separated from the other flue gases in the absorber and pure CO 2 is obtained in the stripper where the solvent is regenerated and recycled to the absorber (Figure 1).

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Section: "Second Generation" Co 2 -Eormentioning

confidence: 99%

Cost Effective Strategies to Reduce CO2 Emissions in the UAE: A Literature Review

Wahedi¹

2013

Ind Eng Manage

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“…Cell size is partially determined by the complexity of the reservoir. The grid specifications for CO 2 …”

Section: Description Of the Sector Modelmentioning

confidence: 99%

“…A high resolution image of the pilot area was obtained 2. Uncertainty in the reservoir performance measurement data [2], [3] ;…”

Section: Uncertainty Parameters Of the Modelmentioning

confidence: 99%

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Integrated History Matching Simulation Study of the First Miscible CO2-EOR Pilot in Abu Dhabi Heterogeneous Carbonate Oil Reservoir

et al. 2011

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Carbon Dioxide (CO 2 ) Enhanced Oil Recovery (EOR) process is most likely to be the future hydrocarbon recovery process in Abu Dhabi [1] . In November 2009, Abu Dhabi Company for Onshore Oil Operations (ADCO) has commissioned the first CO 2 -EOR pilot in the Middle East. The pilot project was implemented successfully on a fast track basis with a broad objective to test the concept of CO 2 flooding in Abu Dhabi complex carbonate oil reservoirs.The project comprises three wells, a single CO 2 injection well, an observation well and a single oil producing well [1] . An intensive reservoir monitoring plan was implemented pre-and post-CO 2 injection to evaluate the uncertainties related to the reservoir fluid and rock properties, CO 2 injectivity, miscibility, and sweep efficiency.Available reservoir static and dynamic data was employed to construct a fully compositional simulation model to history match the pilot performance based on remarkable field observations. Effort was made to ensure that all reservoir data were quality checked, re-interpreted and validated before being utilized in the simulation model.Conventional history matching was conducted to match the model response to the pilot performance. This is complemented with Software Assisted History Matching to further quantify and assess the range of uncertainties for different reservoir parameters that would impact the quality of the history match. Sensitivity analysis was carried out to identify those parameters that have the most effect on the pilot performance. This paper outlines the main findings for the first miscible CO 2 -EOR pilot in Abu Dhabi based on well calibrated compositional model considering the most critical reservoir uncertainties affecting the process.

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“…Takanashi et al (2013) indicated that seismic full waveform analysis might be required for monitoring fluid replaced zones associated with CO 2 injection. Basry et al (2012) reported a field application of crosshole seismic monitoring for a secondary mode CO 2 EOR pilot in Abu Dhabi. Although they achieved a high-resolution image to understand heterogeneity of the reservoir, it was not successfully track CO 2 front between the wells.…”

Section: Introductionmentioning

confidence: 99%

Synthetic Analysis of Full-Waveform Crosshole Seismic Toward CO2EOR Monitoring in Abu Dhabi

Nakamura

Takanashi

Elila

2015

Day 1 Mon, November 09, 2015

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This study aims at designing optimal crosshole seismic approach for CO 2 EOR (enhance oil recovery by CO 2 injection) monitoring in Abu Dhabi. It is not easy to perform successful reservoir monitoring for carbonate reservoirs in the Middle East because rock properties may not change much associated with fluid replacement. We investigate advantage of newly available elastic full waveform inversion (FWI) for detection of CO 2 flooded zones. To investigate advantage, applicability and future problem of time-lapse FWI for CO 2 EOR monitoring, we conducted rock physics study, elastic seismic simulation, and test application of FWI to synthetic data.We first made realistic velocity models based on Gassmann's equation and actual well logs obtained before and after CO 2 injection at carbonate reservoirs in Abu Dhabi. The in-situ light oil at the target reservoirs was replaced by CO 2 (Secondary mode CO 2 EOR). We prepared models with different width and thickness of CO 2 flooded zones and analyzed detectability of seismic waveform change. We also conducted test application of elastic full waveform inversion to synthetic data for delineation of CO 2 flooded zones.Results of the rock physics study show 1.6% decrease in P-wave velocity, little change in S-wave velocity and density associated with secondary mode CO 2 EOR. The small property changes are caused by the rigid rock frame and small density difference in light oil and supercritical CO 2 at the reservoir condition.Next we performed synthetic seismic analysis based on the rock property models, available crosshole seismic source and realistic well distances. Because of the small property change, seismic traveltime difference and waveform change are quite small when well distance is 116ft. When well distance is 700 ft or greater, guided waves, or trapped energy inside low velocity layers can be observed; relatively large waveform change can be observed in the guided waves due to CO 2 injection. Although guided waves have not been used for reservoir monitoring, they are sensitive to small Vp and thus can be an indicator of the CO 2 flooding.The elastic FWI result for a model with well distance of 1160 ft demonstrated good representation of the differential Vp with vertical resolution of 20-30 ft and some horizontal resolution. Although we need further investigation on repeatability and signal transmittability using actual field data, our synthetic study indicates possibility of identifying layers with CO 2 using guided waves and elastic FWI.

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Lessons Learned from the First Miscible CO2-EOR Pilot Project in Heterogeneous Carbonate Oil Reservoir in Abu Dhabi, UAE

Cited by 22 publications

References 4 publications

Cost Effective Strategies to Reduce CO2 Emissions in the UAE: A Literature Review

Cost Effective Strategies to Reduce CO2 Emissions in the UAE: A Literature Review

Integrated History Matching Simulation Study of the First Miscible CO2-EOR Pilot in Abu Dhabi Heterogeneous Carbonate Oil Reservoir

Synthetic Analysis of Full-Waveform Crosshole Seismic Toward CO2EOR Monitoring in Abu Dhabi

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