№ 2, 2019

Simulation of fluids’ flow in beds with deformation bands to estimate the recovery factor and its dependence upon the network’s topological properties of the sandstone’s deformational bands in Yasamal valley

Alkhasli Sh.B.

Khazar University 11, М. Ganjavi Rd., Baku, AZ1096, Azerbaijan: hniknafs@khazar.org

Summary. The main objective of the work is to estimate recovery factor of deformational bands rich bed of Yasamal Valley and to investigate its dependence upon topological properties of de-formational bands network. Balakhany and Sabuncu suites of Yasamal anticline’s eastern limb are subject of the study. Fifty geological realizations were created with different scenarios of deformational bands permeabilities. Inputs for generation of these realizations are derived from the digitized bed of Yasamal Valley with abundance of deformational bands. Results of waterflooding simulations show that presence of deformational bands can significantly reduce the final recovery factor. Fifty realizations allow to provide a range of recovery factors to consider the average, less and most likelihood of recovery factor values. The study reveals that reduction of deformational bands permeability to 0, 2·10−6, 2·10−5, 2·10−4 mDarcy has a significant effect on oil recovery factor, while impact with reduction to 2·10−3 mDarcy is minimal. The same tendency remains in dependence between oil recovery factor and topological parameters. It has been observed, that relationship between final recovery and topological parameters exists. The current study, which is based on the data from Yasamal Valley, provides the methodology for estimating effect of deformational bands on final oil recovery and reveals its dependence upon topological properties (degree of intersections and intensity of deformational bands) of geological models.

Keywords: deformational bands, Yasamal Valley, fluid flow simulation in beds with deformational bands, topology of deformational bands

 

REFERENCES

Aydin A. Small faults formed as deformation bands in sandstone. Pure and Applied Geophysics, V. 116, No. 4-5, 1978, pp. 913-930.

Alizadeh A.A., Akhmedov G.A., Akhmedov A.M., Aliyev A.K., Zeynalov M.M. Geology of the oil and gas fields of Azerbaijan. Nauka. Moscow, 1966, 233 p. (in Russian).

Fossen H., Soliva R., Ballas G., Trzaskos B., Cavalcante C., Schultz R.A. A review of deformation bands in reservoir sandstones: geometries, mechanisms and distribution. Geological Society, London, Special Publications, V. 459, 2017, pp. 9-33.

Zuluaga L.F., Rotevatn A., Keilegavlen E., Fossen H. The effect of deformation bands on simulated fluid flow within fault-propagation fold trap types: Lessons from the San Rafael monocline, Utah. AAPG Bulletin, V. 100, No. 10, 2016, pp. 1523-1540.

Rotevatn A., Sandve H., Keilegavlen E., Kolyukhin D., Fossen H. Deformation bands and their impact on fluid flow in sandstone reservoirs: The role of natural thickness variations. Geofluids, V. 13, No. 10, 2013, pp. 359-371.

 

Download the paper

DOI:10.33677/ggianas20190200034

JOURNAL ARCHIVE

Crossref Member Badge Crossref logo