Karst system analysis of Asmari and Ilam-Sarvak formations in the South-West of Izeh

Authors

Faculty of Earth Science, Shahid Beheshti University, Tehran, Iran

Abstract

In this study, long-duration pumping tests performed in the seven karst wells in Asmari Formation (Kamarderaz and Chal Khoshk Anticlines) and Ilam-Sarvak Formation (Tanush and Shavish Anticlines), south west Izeh, were analyzed and interpreted. The drawdown in fractures and rock matrix was simulated using double-porosity model. The hydraulic of flow in Asmari and Ilam-Sravak Formations was simulated based on the results of interpretation of pumping tests. The maximum and minimum of transmisivity was calculated in well no. 2 (21200 ) and well no. 7 (64 ), respectively. The log-log diagnostic plot of drawdown derivative at the three karst wells in Ilam-Sarvak aquifers was fit to double-porosity type curves. The smooth increases of water levels in the karst wells of the Asmari aquifer were coincident to the diffuse recharge and flow in the high storage capacity matrix. The results showed that the double-porosity model was not able to simulate the filtering effects of diffuse recharge and the flow in the low impermeability – high storage capacity limestone.
 

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References

سازمان آب و برق خوزستان، 1389. مطالعات شناخت منابع آب کارست تاقدیس های بنگستان، چال خشک، و شیرگون. مهندسین مشاور افراز پیمایش.
ناصری، ح.ر.، علیجانی، ف.، نخعی، م.،  1389. مقایسه خصوصیات هیدرودینامیک سیستم کارست سازندهای آسماری و ایلام – سروک در تاقدیس های جنوب غرب ایذه. نخستین کنفرانس ملی پژوهش های کاربردی منابع آب ایران، کرمانشاه.
ناصری، ح.ر.، نخعی، م.، علیجانی، ف. 1388. توموگرافی ژئوالکتریک سازندهای آهکی آسماری و ایلام – سروک در تاقدیس های جنوب غرب ایذه. بیست و هفتمین گردهمایی علوم زمین و سیزدهمین همایش انجمن زمین شناسی ایران، تهران.
Kazemi, H., (1969), Pressure transient analysis of naturally fractured reservoirs with uniform fracture distribution. Soc. Pet. Eng. ., (1969). 451-62. Trans., AIME, 246.
Kruseman, G. P., and N. A. de Ridder (1991), Analysis and Evaluation of Pumping Test Data. Publ 47, ILRI, Wageningen.
Marechal, J. C., B. Ladouche, N. Dorfliger, and P. Lachassagne (2008), Interpretation of pumping tests in a mixed flow karst system, Water Resour. Res., 44, W05401, doi:10.1029/2007WR006288.
Moench, A. F., (1984), Double-porosity models for a fissured groundwater reservoir with fracture skin, Water Resources Research, vol. 20, no. 7, pp. 831-846.
Quinlan, J. F., and R. O. Ewers (1985), Ground water flow in limestone terranes: Strategy rationale and procedure for reliable, efficient monitoring of ground water quality in karst areas, in Proceedings of the National Symposium and Exposition on Aquifer Restoration and Ground Water Monitoring (5th, Columbus, Ohio), pp. 197–234, National Water Well Association, Worthington, Ohio.
Warren, J. E. and P. J. Root. (1963), The behavior of naturally fractured reservoirs. Soc. of Petrol. Engrs. J., Vol. 3, 245-255.

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