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Compositional effects during immiscible gas injection

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Proceedings Papers

Paper presented at the International Petroleum Technology Conference, March 23–April 1, 2021
Paper Number: IPTC-21334-MS
... group development effect during CO 2 flooding under different plugging agent dosage in HH156~HH12P152~HH12P72 fractures Under the premise of effectively plugging the gas channeling between wells, in order to further enlarge the CO 2 swept volume, periodic asynchronous gas injection was...
Proceedings Papers

Paper presented at the SPE Kuwait Oil & Gas Show and Conference, October 15–18, 2017
Paper Number: SPE-187537-MS
... displacement, gas does not develop complete miscibility with oil but still remains in the process of multi-contact miscibility, in which the mass exchange (swelling and stripping) between gas and oil can take place before achieving full miscibility. During immiscible WAG injection, which is the case of this...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193818-MS
...., coupled stress and capillary confinement effects. This paper presents a fully-implicit compositional model which couples nanopore confinement and geomechanical effects during gas injection in tight oil reservoirs. Our simulation results using this model reveals some insightful multiphase and...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 13–16, 2017
Paper Number: SPE-188243-MS
... similar to the target area for the miscible WAG. To confirm the geological similarity of the two areas, simulations for immiscible injection using a 5-spot configuration consistent with the immiscible SWAG pilot were carried out for each area. Results indicated gas distribution was similar in the two...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203038-MS
... displacement analysis may prove useful, and the Darcy law applied to the gas-filled cells may help estimate the distance beyond which miscibility is lost, regardless of the gridding. Figure 8 Effect of gridding on miscibility during CO 2 flooding. So far, we have looked at CO 2 injection. A...
Journal Articles
Journal: SPE Journal
SPE Journal 25 (04): 1711–1728.
Paper Number: SPE-200479-PA
Published: 13 August 2020
... reservoir, respectively. Other important features in three‐phase hysteretic flow include phase trapping, which is believed to be more strongly associated with the gas phase. With these aspects in mind, a vast simulation study has been performed investigating immiscible WAG injection focusing on mechanisms...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193907-MS
... (1991) , which have been implemented in many commercial software packages, such as CMG/GEM and E300. Thus, we identify two clear mechanisms of oil recovery that may occur in near-miscible CO 2 (or other gas) injection which we denote as, M1 for oil stripping or compositional effects, and M2 for low-IFT...
Proceedings Papers

Paper presented at the SPE Middle East Oil & Gas Show and Conference, March 8–11, 2015
Paper Number: SPE-172816-MS
... Abstract This paper presents results of a systematic laboratory study to investigate how three-phase immiscible flow can affect gravity-drainage gas injection in naturally fractured reservoirs. In the experiments, quasi two-dimensional glass-bead packs represented matrix and grooved glass...
Proceedings Papers

Paper presented at the SPE Asia Pacific Improved Oil Recovery Conference, October 8–9, 2001
Paper Number: SPE-72140-MS
... points to the possibility that the permeability will be a function of the confining pressure. Furthermore, SPE 72140 Assessment of Dulang Field Immiscible Water-Alternating-Gas (WAG) Injection Through Composite Core Displacement Studies Ganesan Nadeson, Zahidah Md. Zain/PETRONAS Research & Scientific...
Proceedings Papers

Paper presented at the SPE Europec featured at 80th EAGE Conference and Exhibition, June 11–14, 2018
Paper Number: SPE-190855-MS
... mechanisms have been identified during immiscible WAG injection including oil viscosity reduction, interfacial tension reduction (gas-oil IFT lower than water-oil IFT) and residual oil saturation reduction which result in gas flooding typically having better microscopic displacement efficiency than water...
Proceedings Papers

Paper presented at the SPE Nigeria Annual International Conference and Exhibition, August 11–13, 2020
Paper Number: SPE-203772-MS
... formulation. However, this method may not fully capture the change in fluid behavior as the pressure depletes and cumulative gas injection into the reservoir is increased. This study focuses on the gas phase behavior and gas miscible displacement process through a full-field compositional simulation model to...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190273-MS
...), at both immiscible and near-miscible conditions. The cell selection was designed to experience the full composition path during 1PV injection, but not to be dominated by CO 2 instantly. As seen in Figure 9 , the gas component changes from mostly light components to mostly CO 2 for both...
Proceedings Papers

Paper presented at the EAGE Annual Conference & Exhibition incorporating SPE Europec, June 10–13, 2013
Paper Number: SPE-164934-MS
... sensitivity analyses in immiscible gas injection scenario were maintained reservoir pressure, injection gas composition and matrix critical condensate saturation. Molecular diffusion had no effect on performance of the system in immiscible gas injection because of properties of the matrix block...
Journal Articles
Journal of Petroleum Technology 68 (06): 75–77.
Paper Number: SPE-0616-0075-JPT
Published: 01 June 2016
... core showed a recovery of 70% for immiscible flood and a recovery of 92% for miscible flood. Full-field compositional simulation of gas injection incorporating a tuned equation of state indicated significant incremental oil and reasonable pressure support. 1 6 2016 1 6 2016 1 6 2016...
Proceedings Papers

Paper presented at the SPE EOR Conference at Oil and Gas West Asia, March 31–April 2, 2014
Paper Number: SPE-169707-MS
... measurments, fresh core= 20.73 ˚(left side), aged core=82.29 ˚(right side). During the gas injection step, three different types of gases were used with different CO 2 content under the same experimental conditions to study the effect of gas composition on secondary GOGD from a fractured carbonate...
Proceedings Papers

Paper presented at the SPE EOR Conference at Oil and Gas West Asia, March 26–28, 2018
Paper Number: SPE-190356-MS
..., and after a 2 week soaking period, it was put back on production, and production data were closely monitored for each cycle. Pressure and Temperature conditions imply that the injected HC gas is not miscible, but since the oil is strongly undersaturated, it was found that the beneficial effect of the...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200342-MS
.... Here, we present a practical framework to regenerate the PVT considering the shale nanopores effect for a more reliable compositional simulation of gas injection in shale reservoirs by using existing commercial simulators. The pore-size distribution in shale reservoirs can be discretized into a bulk...
Proceedings Papers

Paper presented at the SPE Europec, December 1–3, 2020
Paper Number: SPE-200616-MS
... illustrate the effectiveness of this upscaling technique for miscible gas injection compositional simulation. According to this upscaling technique, we first replace the fluid model by an alternative one which mimics the immiscible behavior, commonly observed in coarse-scale cells, but not possible to...
Proceedings Papers

Paper presented at the SPE Middle East Oil and Gas Show and Conference, March 18–21, 2019
Paper Number: SPE-195103-MS
... production rates have grown three folds with expanded drilling, workovers, and high volume lift activities. However, there are significant opportunities to increase oil production and optimize gas injection. An Immiscible-Water-Alternating-Gas injection (IWAG) process was carried out on two composite...
Proceedings Papers

Paper presented at the SPE Enhanced Oil Recovery Conference, July 2–4, 2013
Paper Number: SPE-165303-MS
... same core and parameters as previously but this time using a higher injection rates. This is to study the effect of higher injection rates in terms foamability and MRF. It is clearly observed that higher rates produce higher MRF response both during surfactant and gas injection. The increase is more...

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