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Khankala thermal water deposit of the Chechen Republic and resources for the implementation of geothermal circulatory systems

Authors:
M.Sh. Mintsaev
M.Sh. Mintsaev
K.A. Taymaskhanov
K.A. Taymaskhanov
K.A. Taymaskhanov
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Tatiana Churikova at Institute Of Volcanology And Seismology
Tatiana Churikova
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Abstract

In the article, the perspective development of geothermal resources in the Chechen Republic is considered and data on the perspective Khankala deposits of thermal waters is stated. For the estimation on the feasibility of the creation of circulatory systems, the authors have created a 3D model of the most productive XIII layers of this deposit. This allows for proposals of possible locations of water-intake and water injection wells. In conclusion, recommendations for the location of the wells and the creation of a circulatory scheme of intake of deep heat in the Khankala deposit of thermal waters are given.
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124
World of Mining – Surface & Underground 67 (2015) No. 2
Geothermics
1 Introduction
Quick growth in consumption of different types of energy and
the increase in prices of hydrocarbon material in the last years
increases the need for alternative sources of energy [1].
The North Caucasus has a lack of sufficient fossil fuels needed to
fulfill the growing energy demand from the economy and social
sphere of the region. However, the region hosts substantial re-
sources of geothermal water, which may be utilized as an energy
supply. Specifically, this water can be used as a heating supply,
which would allow a reduction in the consumption of hydrocarbon
material. The Chechen Republic has vast potential in geothermal
water power production [2].
The Chechen Republic takes the third place among regions of
the Russian Federation in abundance of deposits of geothermal
water, giving way only to the Dagestan and Kamchatka regions.
The developed deposits of geothermal water in the republic are
made up of 14 deposits producing 64,680 m3/d. Presently, only
two deposits are stock approved by SRC in volume, 16,250 m3/d
(Khankala – 15,100 m3/d and Goytinsk – 1,150,000 m3/d), making
~ 25 % of the developed deposits [3, 4].
The most studied perspective deposit of thermal water is
Khankala, due to its potential, geological construction, and its
physico-chemical characteristics of thermal water.
Prof. Dr. MAGOMED SHAVALOVICH MINTCAEV,
Street GSP-2, pl. Ordzhonikidze, house 100 (364051), Grozny,
Chechen Republic, Russia
Tel. +89286420606
e-mail: ranas@rambler.ru
Prof. Dr. KHASAN ALIMSULTANOVICH TAYMASKHANOV,
Street GSP-2, pl. Ordzhonikidze, house 100 (364051), Grozny,
Chechen Republic, Russia
Tel. +89286430606
e-mail: rectorggntu@gmail.com
Dr. TATIANA GEORGIEVNA CHURIKOVA,
Street GSP-2, pl. Ordzhonikidze, house 100 (364051), Grozny,
Chechen Republic, Russia
Tel. +7 926 100 83 73
e-mail: tchurikova@mail.ru
Khankala thermal water deposit of the
Chechen Republic and resources for the imple-
mentation of geothermal circulatory systems
MAGOMED SHAVALOVICH MINTCAEV, KHASAN ALIMSULTANOVICH
TAYMASKHANOV, TATIANA GEORGIEVNA CHURIKOVA, Chechen Republic, Russia
In the article, the perspective development of geothermal re-
sources in the Chechen Republic is considered and data on the
perspective Khankala deposits of thermal waters is stated. For the
estimation on the feasibility of the creation of circulatory systems,
the authors have created a 3D model of the most productive
XIII layers of this deposit. This allows for proposals of possible
locations of water-intake and water injection wells. In conclusion,
recommendations for the location of the wells and the creation
of a circulatory scheme of intake of deep heat in the Khankala
deposit of thermal waters are given.
Technical and scientific problems, regarding deposit exploitation,
are connected with the complex configuration of the geothermal
water reservoir, insufficient information on level of hydro-geological
characteristics of the reservoir, and physico-chemical character-
istics of the fluid.
The impact of thermal waters on the environment is uncertain, as
they contain such substances and elements as selenium, mercury,
and phenols, arsenic, lead, etc. [5-7]. Toxic gases are also emitted
from geothermal water, specifically hydrogen sulfide, methane and
ammonia. The discharge of such waters to the earth’s surface and
in the natural reservoir after processing may pose environmental
hazards [8]. The thermal waters of the Khankala deposit have
increased mineralization and corrosive activity that can lead to
corrosion and damage to pipes and wells. Thus, the task of ef-
fective utilization of the Khankala deposit is complex and requires
realization of the revised utilization and reinjection of the circulatory
scheme (SS), and multi-level utilization of the thermal waters. It
is possible to consider the following as the basic obstacles to
the application of circulatory technology: high requirements for
the geologic-geothermal characteristics in the natural collection
process, such as depth, temperature, capacity, penetration and
injection, which determine the economic appropriateness of
geothermal power supplies [9-11].
A study on the experience of circulatory scheme implementa-
tion in France (Dogger reservoir) shows that the most complex
technological area in the realization of the circulatory scheme is
the process of reinjection. Aspects of geological conditions in
the French deposits are the most favorable, related to aspects of
power input on reinjection. These conditions are characterized
by the availability of homogenous fractured rocks with increased
penetration potential. The Khankala deposit is characterized by
complex geological construction, conditioned by an inter-layering
of collector rocks and impermeable rocks [12, 13].
Information about geological construction and hydro-geological
peculiarities of the Khankala deposit and the chemical content of
its thermal water, stated in this article, has been prepared within the
research of the project of the state task under No. 13.1738.2014/K
from June 17, 2014.
2 Materials and methods
The Khankala deposit of thermal water is the biggest on the
territory of the ChR and is located 10 km south-east of Grozny.
... Gordeeva et al., 2002). Currently Northern Caucasian thermal waters are largely used for heating supply, hot water supply and balneological purposes (Zaurbekov et al., 2016; Mintsaev et al., 2015a; 2015c). By the way, a geocirculation heating station with a hothouse complex as consumer built in 2015 has been successfully working in the Chechen Republic on the Khankala deposit. ...
... 1). The Khankala deposit 7,3 km 2 in area is the largest and most developed one (Zaurbekov et al., 2016; Svalova, 2009; Gordeeva, G.V. et al. 2002; Mintsaev et al., 2015a; 2015b; 2015c; Machigova et al., 2014). Chechen hydrothermal sources are characterized not only by heavy stocks, high yields and temperatures (to 103 0С) but also low mineralization, usually below 2,0 g/l, and relatively high content of silicic acid (to 120 mg/l), that makes them silicious (Machigova et al., 2012). ...
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