American Journal of Research in Humanities and Social Sciences 
ISSN (E): 2832-8019                Volume 13, | June, 2023                      

 

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THE RESULTS OF THE FORECAST OF THE MAIN TECHNOLOGICAL 

INDICATORS OF THE DEVELOPMENT OF THE OIL AND GAS 

CONDENSATE FIELD EASTREN ISPANLI  
Bobomurodov Utkir Ziyodullayevich 

Karshi Engineering-Economics Institute, Uzbekistan 

 PhD "Oil and Gas Work" Department Associate Professor 

 

A B S T R A C T K E Y W O R D S 

The results of calculation of the main technological indices of the 

development of Sharqiy  Ispanli oil and gas condensate deposit are 

presented for various options, differing in the sequence of oil and gas 

sampling. It is shown that during the development of the field with 

the use of vertical wells and the faces of producing wells, free gas 

will break through. It is recommended to drill multi-hole wells with 

horizontal trunks. 

reservoir, operation, fund, 

reserve, mode, rim, 

development, system, well, 

coefficient, extraction, gas 

cap, selection, efficiency. 

 

In recent years, a number of under-gas oil deposits with small reserves have been discovered in 

Western Uzbekistan, some of which are in trial operation by a small number of producing wells. For 

these deposits, it is important to choose an effective development system based on the geological and 

physical conditions of the deposits. 

Usually, the category of small fields includes fields developed with only a few wells (up to 10) and 

having small recoverable oil reserves (up to 0.5 million tons) [2]. When designing the development of 

such facilities, the choice of options is significantly limited due to the fact that traditional methods of 

waterflooding and enhanced oil recovery are not very profitable. In this connection, in the vast majority 

of cases, fields with small reserves are operated under natural conditions. This category includes the 

Sharkiy Ispanli field, which was discovered in 2001. The massive domed gas condensate reservoir 

with an oil rim is confined to the ХV-НР and ХV-Р horizons of the Upper Jurassic carbonate deposits. 

As is known, under-gas oil deposits in accordance with the "Rules for the development of oil and gas-

oil fields" according to the ratio of the volume of the oil-saturated part of the deposit (Vn) to the volume 

of the entire deposit (Vn + Vr) are divided into various types [2]. 

- oil fields with a gas cap or a gas condensate cap (Vn >0.75); 

- gas or gas condensate oil (0.50 Vn ≤ 0.75); 

- oil and gas or gas condensate (0.25 <Vн ≤0.50); 

- gas or gas condensate with oil rim (Vн≤0.25). 

The volume of the oil-saturated part of the Sharkiy Espanli field is 4025.6•103m3 in total, and C2 is 

1629.5•103m3. 

The volume of the gas-saturated part of the field is 6439•103m3 in total, including the volume of the 

gas-saturated part of the reserves category C1-2604.8•103m3, and C2-3834.2•103m3. The ratio of the 

volume of the oil-saturated part of the deposit to the volume of the entire deposit for reserves of 



American Journal of Research in Humanities and Social Sciences 
Volume 13, June, 2023 

 

P a g e  | 103  www.americanjournal.org 

categories C1, C2, and C1 + C2 is 0.479, respectively; 0.298 and 0.385 i.e. The Sharky Spanish field 

belongs to the oil and gas condensate type. It should be noted that according to the classification of the 

All-Russian Research Institute, the field belongs to the type of gas condensate deposits with an oil rim 

of subordinate industrial significance [2]. 

The development of deposits with under-gas oil objects is very specific, which is due to the presence 

in one deposit of actually two non-isolated deposits - an oil zone and a gas cap [5,6]. 

The conditions of occurrence of oil and combined gas in under-gas oil facilities are usually 

characterized by: 

- the presence in one collector of two accumulations of oil and free gas that are not isolated from each 

other; 

- the proximity of the location of water and gas-oil contacts: 

- practically unchanged in the process of development the contours of the deposit (in plan); 

- almost uniform distribution of reservoir energy over the reservoir volume; 

- equality of the initial reservoir pressure and saturation pressure of oil with gas. 

The listed features significantly distinguish the technology for the development of gas oil facilities and 

methods for its design from the technology for the development of oil deposits. 

When designing the technology for the development of gas oil facilities, it becomes necessary to solve 

the following problems: 

selection of the order of extraction of oil and gas reserves; 

- selection of the optimal well grid density; 

- the size and location of the optimal perforation interval; 

- substantiation of optimal drawdown and flow rate of production wells. 

The correct solution of these problems will favor the rational development of oil deposits without 

premature breakthroughs of gas and water to the bottoms of wells. 

Below, we will consider the justifications for these tasks for choosing the system for developing the 

Sharkiy Spanishli field. 

Option I provides for advanced development of oil reserves. Oil producing wells will be placed in the 

oil-bearing zone with category C1 reserves evenly with a grid density of 20 ha/well. Since the 

conservation of gas cap reserves until the full development of the oil part can be more than 25 years, 

and during this time part of the gas reserves will be extracted through oil wells, which will practically 

be lost due to low pressure. Therefore, after the extraction of the main oil reserves, simultaneous 

extraction of gas from the gas cap will be carried out. 

The fund of oil-producing wells at the stage of oil selection will be 0 units: it is planned to introduce 

8 oil-producing wells from drilling to the zone of wells No. 1 and 4, also with initial oil flow rates of 

10 tons / day. After the extraction of the main oil reserves, 1 well (No. 1) will be transferred to gas 

production by transferring the extraction interval to the gas-saturated part of the deposit. According to 

variant II, almost from the beginning of development, it is supposed to carry out controlled extraction 

of gas from the gas cap. In the first year of development, wells No. 1 and 4 will be in operation. Starting 

from the second year of development, well No. 1 will be transferred to the gas producing fund, since 

the gas factor equal to 1944 m3/m3 obtained when testing the interval 2552-2544 m indicates available 

gas inflow from the gas section. According to this option, with a grid density of 20 ha/well, the stock 

of oil producing wells will be 9 units (8 new project wells), and the gas well stock will be 1 unit. 



American Journal of Research in Humanities and Social Sciences 
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According to option III, in order to avoid conservation of the gas cap gas, it is planned to carry out 

simultaneous extraction of oil and gas from the beginning of development. Research V.M. Shevtsova 

and A.U. Nazarov [3] substantiated that in the joint development of the oil part and gas condensate 

deposits of oil and gas condensate fields, high rates of recovery and hydrocarbon recovery rates are 

achieved by perforating production wells at the gas-oil contact. Therefore, it is planned to perforate 

the GOC zone at all wells, covering the oil-saturated and gas-saturated parts of the section. The well 

stock for simultaneous extraction of oil and gas will be 10 units. 

As can be seen from the above, the considered options for the development of the oil and gas 

condensate field Sharkiy Ispanli differ only in the sequence of oil and gas withdrawals at the same 

density of the well pattern, which will allow a more objective assessment of the effectiveness of the 

development systems under consideration. 

Due to the lack of a set of necessary initial data for the application of hydrodynamic calculation 

methods, the forecast of development indicators (reservoir pressures, gas factor, water cut of well 

production, etc.) was carried out on the basis of static dependencies recommended in the 

methodological guide for calculating recovery factors from the subsoil [1] . 

The initial oil production rates of wells and the dynamics of their decline in the development process 

are substantiated by static processing of well operation data similar in structure, stratigraphy and 

lithology to the XV-P and XV-HP horizons of the South Kemachi, Umid and Markovskoye fields. 

Processing of the results of the operation of many wells of the Umid, South Kemachi, Markovskoye 

fields, exploiting oil rims with a thickness of up to 6 m, 6-8 m, 8-10 m and more, made it possible to 

establish a trend in their flow rates depending on the thickness of the drained object. The maximum 

value of the limiting "gas-free" and "anhydrous" oil flow rate is 10 t/day. 

 

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газонефтяных месторождений. - Москва: ВНИИ, 1996.-202 с. 

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С.28-30. 

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безгазовых дебитах скважин // Геология, геофизика и разработка нефтяных и газовых 

месторождений. -2007.-№6 С.\14-19. 

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скважин по газу// Геология, геофизика и разработка нефтяных и газовых месторождений. -2007. 

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