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ГЕОЛОГО-МИНЕРАЛОГИЧЕСКИЕ НАУКИ
THE EXAMINATION OF COMPLEX PROJECT OF ACHIMOV
RESERVOIR GAS CONDENSATE FIELD DEVELOPMENT
1 2 Akhmetov R.R. , Krainov S.A.
Email: [email protected]
1Akhmetov Radmir Rustemovich - Student; 2Krainov Sergei Alexeevich - Student, PETROLEUM ENGINEERIND DEPARTMENT, SAINT PETERSBURG MINING UNIVERSITY, SAINT PETERSBURG
Abstract: article created a geological and the hydrodynamic sector model of the deposit, developed a detailed long-term development project that maximizes recoverability of condensate for a period of 15 years, conducted an investment assessment and detailed the economic effectiveness of the proposed project. As a result of low permeability, a large number of lenses and heterogeneity collection properties, it was decided to implement 210 wells on the area of825 square km, provide hydraulic fracturing. That would result in total production of condensate over 15 years equal to 240620 tonnes. Therefore total amount of investments is 64.76 billion rubles (1.1 billion dollars), total income from sales is 500.7 billion rubles (9.1 billion dollars).
Keywords: gas-condensate, field development, gas recovery.
ИССЛЕДОВАНИЕ КОМПЛЕКСНОГО ПРОЕКТА РАЗРАБОТКИ
АЧИМОВСКОГО ГАЗОКОНДЕНСАТНОГО МЕСТОРОЖДЕНИЯ
12 Ахметов Р.Р. , Крайнов С.А.
1Ахметов Радмир Рустемович - студент; 2Крайнов Сергей Алексеевич - студент, кафедра транспорта и хранения нефти и газа, Санкт-Петербургский горный университет, г. Санкт-Петербург
Аннотация: в статье были построены геологическая и гидравлическая модели месторождения, а также разработан проект разработки месторождения и добычи газоконденсата на 15 лет, проведен анализ инвестиций и экономической эффективности проекта. Так как проницаемость пласта низкая, а коллекторы имеют линзовидную форму, было решено ввести в эксплуатацию 210 скважин на площади 825 квадратных километров, провести гидроразрыв пласта. В результате через 15 лет будут добывать примерно 240620 тонн газового конденсата, инвестиции составят 64.76 миллиарда рублей, выручка от продажи составит 500.7 миллиарда рублей.
Ключевые слова: газоконденсат, разработка месторождения, добыча газа.
УДК 551.1.4
DOI: 10.20861/2304-2338-2017-116-001
The geological structure of the Achimov deposit is represented by platform formations of different periods - Jurassic, Cretaceous and Paleogene - Quaternary. They lie on the foundation of rocks of pre-Jurassic age [5].
The Achimov beds are reservoirs with a very complex distribution of lenticular bodies. In the Achimov deposits, several local reference strata of clays 3-15 meters thick are distinguished. These strata divide the Achimov strata into several independent layers.
Lenticular form of sand bodies of the clinoform sequence, their reliable isolation provide a dense package in space, so the potential deposits in such bodies are almost independent of anticlines, but are controlled by the intrinsic morphology of each individual lens and the quality of the collectors and represent rather a layering of a broken or stepped structure [6].
The reservoir is characterized by poor and heterogeneous reservoir properties, low permeability, complicated by tectonic and lithological screens, characterized by a multiphase reservoir condition. In addition, the Achimov deposits are characterized by abnormally high reservoir pressure, more than 600 atmospheres, and the presence of heavy paraffin (Figure 1) [2].
Here is the plotted geological sector model of the Achimov field.
Fig. 1. Geological and hydraulic sector model of Achimov field
As a result of investigated properties of the reservoir it was decided to put in 200 horizontal multi-hole wells with uniform location. That will give us minimal number of wells and equal pressure. The scheme of exploitation (Figure 2).
4000 m3
Fig. 2. The scheme of exploitation
The effectiveness of multi-study hydraulic fracturing would be 2 times more than simple hydraulic fracturing with the same cost. It would also have 100 metres length of the crack versus 20 metres for hydraulic fracturing [1, 3].
Next figure shows the strategy for production operation for next 16 years (Figure 3).
Time, years
Fig. 3. The dependence of terrastic pressure during production activity on time for the next 16 years
Another plotted graph gives information on expected condensate production during the upcoming 16 years (Figure 4).
n 111 ! 11 ■ a rr
13 I4 15 16 Time, years
Fig. 4. Dependence of condensate recovery (thousand tonnes) on timefor the next 16 years Table 1. The parameters of Achimov field production
Initial gas reserves Average production rate of 1 well Total gas recovery after 15 years
138 billions m3 1095000 tonnes 240620000 tonnes
Here is the process flowsheet and the infographic of holding (Figure 5).
Fig. 5. Process flow sheet and info graphic of holding
CAPEX. Well stock: drilling of a horizontal well with a hydraulic fracturing of the reservoir with an average depth of 4000 m - 3 million $. 200 wells (100 exploitation, 100 injection) - 0.6 billion $. Borehole of a parametric borehole 4.5 million $. 10 parametric wells - 2.5 billion rubles.
Equipment: The separator with a capacity of 440 thousand m3 / h, based on our production rate, there are 2 separators + 2 reserve ones - 0.72 million $. Compressor capacity of 19500 m3 / h (T = 118 C, P = 5.5 MPa). It is necessary to build 102 compressors (one per injection well for injecting gas into the reservoir, 2 to maintain pressure in the main pipeline - 0.07 billion $).
GMS "Sputnik". Counts the production rate of 14 wells, it is necessary to have 8 such facilities - 0.15 million $. Pumping station: Capacity 335 m3 / h. Requires 2 stations to maintain condensate pressure in the main pipeline - 0.14 million $.
IGTU. The device for cooling gas - 3 units - 0.2 million $, Cyclone 27000 m3 / h - 3 vehicles - 0.11 million $, Three-stage separator - 2 complexes - 0.73 million $, Security hangar - 0.05 million $. Tank farm. 8 tanks for condensate storage, equipped with a floating lid and heating, volume 20000
m3
Buildings and constructions: Electric station for 5 MWh. The power plant receives 40% of the produced gas, with a specific heat of combustion of 46KJ / mol and an efficiency of 45% will produce power up to 3.5 MWh with the possibility of increasing the energy production up to 5 MWh while expanding the development zone - 0.08 mln $.
Operator room with administrative premises. Area - 800 m2, 2 floors - 0.55 million $, Fire Department Equipped with a water storage tank / foam, 4 firemen ATV - 0.9 million $ Communications: borehole drilling for water - 1.8 thousand dollars. Water tower - 4.55 thousand dollars. The total cost: if we assume that the cost of developing a project is approximately 10% of the cost of equipment, and installation and commissioning is 50%, then
£ = (0.74 billion $) x 160% = 1.184 billion $.
EBITDA recovery factor = 0.6 - 8.5 billion $.
The first 4 years we receive a profit from its sale. According to schedule, given the development capacity and the fact that only 60% of natural gas is used for production, it will go for sale in the first year - 0.014 billion, 2-year - 0.028 billion, 3-year - 0.042 Billion, 4-year - 0.056 billion cubic meters of natural gas. At the gas rate as of March 7, 16, 0.08 $ per 1 cubic meter of gas, we will receive a profit from gas sales for 4 years -0.59 billion $, £ = 9.7 billion $.
REVEX. Monthly costs are composed of salaries to employees, depreciation of work equipment, taxes. The average monthly income is 0.05 billion $, the tax is composed of the Value Added Tax 18% and the tax on the extraction of minerals (for gas condensate 11.8 $ from each ton of extracted raw materials), the monthly expenditure on taxes: 9.09 million + 84 million = 1.53 million $. About 30 people will be involved in this field, the average salary is about 1.8 thousand, the expenditure on the reserve is 0.054 million $. Depreciation of equipment, taking into account its service life of 20 years, about 0.36 million $ [9], E = 11.046 million $.
FCF. The net profit taking into account the deduction of expenses in the time interval equal to one month is E = 0.04 billion $.
NPV. Reading the profit for the entire development period, taking into account the deduction of monthly expenses and capital expenditures.
E = 9,7 billion $ - 2.22 billion $ = 7.48 billion $, E = 7.48 billion $.
In order to access the profit was plotted a chart showing the dependence of number of different wells on 15 years operating period (Figure 6).
Time, years
Fig. 6. Dependence of operating and drilled wells from time References / Список литературы
1. Gritsenko A.I., 1997. Methods of Increasing Gas Condensate Well Productivity ed Ter-Sarkisov R.M., Shandrygin A.N., Podyuk V.G. (Moscow: Nedra Publishing House.) 365 p.
2. Langedijk R.A. et al., 2000. Optimization of Hydraulic Fracturing in a Deep, Multilayered, Gas Condensate Reservoir SPE Annual Technical Conf. and Exh. (Dallas, Texas).
3. Al-Hashmi H.S. and Hashmi S.S., 2000 Long-Term Performance of Hydraulically Fractured Layered Rich Gas Condensate Reservoir SPE International Oil and Gas Conference and Exhibition (Beijing, China).
4. James Lea, Henry V. Nickens and Michael Wells. Gas Well Deliquification: Solution to Gas Well Liquid Loading Problems.
5. Cycling process opportunites for Achimov deposits development / S.M. Lyutomsky, V.Ye. Miskevich. / TyumenNIIgiprogaz.
6. Development of Gas Condensate Field Using Stimulation of Formation. Moscow: Nedra, 1996. R.M. Sarkisov, A.I. Gristenko.
