Reson of sand production on drinking wells Islamshahr town

فصلنامه زمین شناسی محیط زیست

Article 5, Volume 8, Issue 26, March 2015, Pages 67-82   

Authors

M Salari; M Sayadi

Abstract

Sand production is defined as the extraction of amounts of fine grain sand and silt while drilling and
exploitations of wells. This phenomenon has resulted in quantity, quality, engineering, and environmental
problems within parts of the country. The villages of Islamshahr province are among such regions within
the country which have been facing this problem in recent years. The goal of this study is to introduce this
issue and to explore the reasons, and quantify sand production in 10 fresh water wells within the villages of
Islamshahrprovince. In this respect, according to the measurements made within five consecutive cycles in
a day(starting point, one, four, eight, and twelve hours) using well head facilities from 1stBahman 1389
untillAban 1390, during which it was proved that HassanabadKhalese, Malekabad, and Shatereh villages
located in the southern part of the province do exhibit fine grain sediments which as with the start of
pumping and after 4 hours, the sand production reduces ; however after 12 hours of the starting point, sand
production increases. Although within the northern, and north western regions of Islamshahr province (for
instance Ahmadabad Mostofi, FiroozBahram, and Goldasteh,…) which exhibit coarse sediments, as the
starting point and after four hours, sand production deemed to be major while after 12 hours of pumping ,
this amount decreases. Therefore it is recommended to reduce sand production by use of the natural well
developments based on proper leaching, pumping tests using controlled motor cycles, artificial
development including the implementation of sandy gravel pack, and double gravel pack, along with dual
layering of wells, and application of polymer pipes, and sieving filters.

Keywords

Sand production; Islamshahr; pumping; fine grain; sediments texture