On the evaluation of Fast-SAGD process in naturally fractured heavy oil reservoir

Kamari, Arash; Hemmati-Sarapardeh, Abdolhossein; Mohammadi, Amir H.; Hashemi-Kiasari, Hani; Mohagheghian, Erfan

doi:10.1016/j.fuel.2014.10.065

Cited by 38 publications

(14 citation statements)

References 27 publications

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“…This study examined a set of Swir and Sorw practical values in order to represent the effect of low and high temperature steamflood tests on the shape of oil relative permeability curves that were conducted on fractured carbonate model during a 9-year period. Viscosity of most heavy oil and bitumen decreases as temperature is increased (HemmatiSarapardeh et al, 2013a(HemmatiSarapardeh et al, , 2013bKamari et al, 2015;Kamari et al, 2014), which improves the overall mobility ratio of the cyclic steam injection displacement process. Table 2 provides a summary of the practical values endpoint residual oil saturations to steam flood as a function of temperature for the evaluated dataset.…”

Section: Resultsmentioning

confidence: 99%

The Evaluation of the Impact of Wettability Alteration and Oil Relative Permeability Changes With Temperature During Cyclic Steam Injection in Naturally Fractured Reservoirs Using Horizontal Wells

Kamari¹,

Nikookar²,

Sahranavard³

et al. 2015

Petroleum Science and Technology

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In this communication, first, cyclic steam injection process in an Iranian heavy oil reservoir was simulated using three horizontal wells and the effect of various operational parameters on the performance was studied. This study has been done on the fractured reservoirs, as there are few studies on cyclic steam injection and the effect of temperature changes on the oil relative permeability in such reservoirs. Then, some practical values of irreducible water saturation and residual oil saturation at different temperatures have been considered for study of their effects on the oil recovery and oil relative permeability, because these practical values are so useful for prediction of production performance. The conclusions indicate that irreducible water saturation and residual oil saturation have significant impact on recovery factor and cumulative steam oil ratio. Comparison of four various methods show the difference in calculated oil relative permeability at various water saturations.

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Section: Resultsmentioning

confidence: 99%

The Evaluation of the Impact of Wettability Alteration and Oil Relative Permeability Changes With Temperature During Cyclic Steam Injection in Naturally Fractured Reservoirs Using Horizontal Wells

Kamari¹,

Nikookar²,

Sahranavard³

et al. 2015

Petroleum Science and Technology

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“…With the use of the commercial package CMG‐STARS 2017, we obtain solutions to the final set of matrix equations using Newton‐Raphson iterations. CMG‐STARS has been used in the modeling of heavy oil‐related problems for several years with great accuracy . A high‐performance computing cluster (HPCC) system was used to run the simulations for computational speeds.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…The now mobile oil subsequently drains into a lower well via gravity. Modifications of this procedure include the FAST‐SAGD and the noncondensable gases SAGD which help to improve on certain undesired characteristics of the conventional SAGD. Cyclic steam injection (CSS) is another thermal technique which involves different cycles of injection, soaking, and production.…”

Section: Introductionmentioning

confidence: 99%

A fishtail well design for cyclic steam injection—A case study from Yarega heavy oil field in Russia

Abzaletdinov

Ajayi

Elnoamany

et al. 2019

Energy Science & Engineering

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Yarega heavy oil field (YHOF) is a naturally fractured heavy oil field where only recently steam‐assisted gravity drainage (SAGD) technology has been introduced. SAGD employed in this field has so far resulted in early steam breakthrough leading to producer well abandonment and recurrent drilling procedures invariably increasing costs. Therefore, as opposed to SAGD, we propose the joint application of cyclic steam injection (CSS) technology with fishtail wells. The advantages of CSS are well documented. The addition of fishtail wells to this strategy assists in reducing the travel time the mobilized oil takes to arrive at a well perforation. Our results demonstrate that the synergy between these two strategies can further improve recoveries in heavy oil reservoirs. A reservoir simulation model of a sector in the YHOF is employed to understand heat/mass transfer mechanisms and for production enhancement recommendations. Different well configuration strategies were tested on this model. Results from the three‐dimensional sector in the YHOF model suggest that in addition to the thermal development technologies employed in this reservoir, CSS coupled with fishtail wells provided favorable steam‐oil ratios, cumulative energy‐oil ratios, and enhanced cumulative oil recovery for a naturally fractured reservoir. Well abandonment issues arising from SAGD approach currently being applied can therefore be eliminated. Based on results from this research, we recommend the testing of a fishtail well development plan with CSS that includes a 10‐day steam injection, 10‐day soaking period, and 10‐day production period. In comparison with continuous steam injection recovery (4.5% over 3 years), our simulation results showed an improved recovery of 7% over the same period with this concept. In addition to the technical advantage of this strategy, favorable steam‐oil and energy‐oil ratios imply that minimal economic costs are achieved and carbon footprints are lessened.

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“…SAGD is an efficient recovery process for producing heavy oils and bitumen resources (Ameli and Mohammadi 2018;Kamari et al 2015). This method was first proposed and developed by Butler et al (1981).…”

Section: Introductionmentioning

confidence: 99%

Significant effect of compositional grading on SAGD performance in a fractured carbonate heavy oil reservoir

Ghalenavi

Norouzi-Apourvari

Schaffie

et al. 2019

J Petrol Explor Prod Technol

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In reservoir simulation, the fluid composition is usually assumed uniform for the whole reservoir, while in many reservoirs, oil and gas composition changes with depth. This phenomenon which is known as compositional grading could be significant in heavy and super heavy oil reservoirs. In these reservoirs, biodegradation and asphaltene precipitation are considered as the main reasons behind this phenomenon. Compositional grading in heavy oil reservoirs could affect fluid viscosity and vaporizing-condensing mechanism in steam-assisted gravity drainage (SAGD) operations. In this paper, through a simulation study, one of the Iranian heavy oil reservoirs which have a significant compositional grading was selected to investigate the effect of compositional grading on the performance of simulated SAGD method. The reservoir is a fractured carbonate reservoir, and its compositional grading is maintained because of the lack of convection inside the reservoir. To verify the importance of compositional grading, the performance results of the SAGD method for compositional grading case were compared with that of uniform composition case. The result showed that ignoring compositional grading would lead to underestimation of ultimate recovery in the fractured model. The study of SAGD process in a non-fractured reservoir model showed that considering compositional grading has an insignificant effect on SAGD performance.

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On the evaluation of Fast-SAGD process in naturally fractured heavy oil reservoir

Cited by 38 publications

References 27 publications

The Evaluation of the Impact of Wettability Alteration and Oil Relative Permeability Changes With Temperature During Cyclic Steam Injection in Naturally Fractured Reservoirs Using Horizontal Wells

The Evaluation of the Impact of Wettability Alteration and Oil Relative Permeability Changes With Temperature During Cyclic Steam Injection in Naturally Fractured Reservoirs Using Horizontal Wells

A fishtail well design for cyclic steam injection—A case study from Yarega heavy oil field in Russia

Significant effect of compositional grading on SAGD performance in a fractured carbonate heavy oil reservoir

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