26th World Gas Conference - International Gas Unionmembers.igu.org/old/IGU Events/wgc/wgc-2015/committee...1 –5 June 2015, Paris, France 26th World Gas Conference STRATEGY OF DEVELOPING

1 – 5 June 2015, Paris, France

26th World Gas Conference

STRATEGY OF DEVELOPING ACHIMOV DEPOSITS OF URENGOY

REGION

Vitaly MARKELOV, Vsevolod CHEREPANOV, Maxim KOBYLKIN, Valery

MINLIKAEV, Sergey MAZANOV, Stanislav SOROKIN, Maxim ZHARIKOV,

Alexander NEUDAKHIN, Anton TIPUGIN, Sergey SKRYLEV, Alexander

NESTERENKO

MOSCOW

General information on Big Urengoy fields

2

Three gas-bearing layers:

- Cenomanian

- Neokomian (Valanginian)

- Achimov

Area is more than 5 000 km2

Apprx.3000 wells

16 UKPG for Cenomanian gas

5 UKPG for Valanginian gas

2 oil treatment facilities

2 UKPG for Achimov gas

Produced from the start of the

development:

- 6,6 trillion cum gas

- 140 million t condensate

- 13 million t oil

Neokomian

Achimov

Cenomanian

Raw materials reseerves in Cenomanian, Valanginian and Achimov

formations, fields of Gazprom dobycha Urengoy LLC

III

II

I

IV

V

VI

485,1

96,4

54,7

73,5

146,6

113,9

1 593,8

333,3

205

244,1

447,7

378,1

Totalreserves

V area

IV area

III area

II area

I area

Dry gas, billion cum Condensate, million t

Valanginian

Cenomanian

Reserves depletion

- Current reserves

- Extracted reserves

72% 28%

54%46%

Achimov formations reserves

3

Distribution of license holder rights for Achimov formation, Urengoy field

►Subsoil use rights within the area of main

Achimov formation spread belong to three main

subsoil users:

Gazprom dobycha Urengoy LLC

►OAO Arcticgaz

►ZAO Rospan International

Productive strata of Achimov formation on

Urengoy field were discovered in 1976.

HC saturation of Achimov formation was

established in 16 strata.

Cumulative geological reserves:

- gas –2,96 trillion cum

- condensate – 0,48 billion t

- oil - 0,54 billion t

4

Unallocated land




OAO Arctichiskayagasovaya companya

ZAO Georesurs

ZAO RospanInternational

ZAO RospanInternational

OOO Urengoy gas company

OAO Arctichiskayagasovaya companya

OOO NK Severneft

Distribution of Achimov formations HC reserves between subsoil users

5


owns:

- 56 % of dry gas reserves

- 55 % of condensate reserves

- 25 % of oil reserves25.0

18.1 2.3

54.6

25.0

7.8

64.8

2.4

Condensate

Oil


ZAO Rospan

OAO Arcticgaz

Others

55.9

2.218.1

23.7

Dry gas

Main parameters of Achimov formation development, Urengoy region

Order of wellscommissioning

Separation gas434 billion cum Condensate129 million t

By 2030 the Company will produce:

6

Dry gas

production,

bln cum

Gazprom dobycha

Urengoy LLC

OAO Arcticgaz

ZAO Rospan

International

Oil and stable

condensate

production, tsd. t

Others

Gazprom dobycha Urengoy

LLC

OAO Arcticgaz

ZAO Rospan International

V area (commissioning in 2017 году):

- 87 wells

- design output – 9,588 billion cum/year

Development of Achimov formation, Gazprom dobycha Urengoy LLC

In 2008 UKPG-31 was

commissioned with the

design annual output

rate:

• 8,5 billion cum gas

• 2,3 million t unstable

condensate

In 2009 UKPG-22 was

commissioned with the

design annual output rate

• 3,6 billion cum gas

• 1,7 million t unstable

condensate

I area:

- 113 wells

- design output - 10,51 billion cum/year

II area (further development in 2017 году):

- 130 wells


III area (commissioning in 2019 году):

- 105 wells


IV area (commissioning in 2017 году):

- 77 wells


Start of Achimov

formation development

Outlook for Achimov formation

development

7

Characteristics of the layers, Achimov formation

8

Layer

index

Porosity, % Permeability,

mDа

Formation

pressure, MPa

Formation

temperature, °С

Ач3-4 11-19 0,1-5,4 59 105Ач5 14-17 0,4-3,8 60 106

Gazprom dobycha Urengoy LLC OAO Arctichiskaya gasovaya companya

Evolution of well completion technology. Stages 1-2

9

1. Vertical formation penetration

Pros:

Low cost of construction

Possibility of massive hydrofracturing

Contras:

Low output rates

High drawdown

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Xf ≈ 140 m

Pros:

Tried-and-true technology

High and stable productivity

Contras:

Uncontrolled growth of

vertical fracs

Small area of formation drainage

Evolution of well completion technology. Stages 3-4

10

3. Horizontal wellbore

Pros:

Possibility of wells stock reduction

Inclusion of distant zones

Contras:

High cost of construction

High cost of research

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4. Horizontal wellbore + multi-stage hydrofracturing

Pros:

Possibility of wells stock reduction

Large area of formation drainage

Contras:

High cost of construction

High cost of research

Necessity of a geo-mechanical model

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SUFА 12/06 (09)

underground shut-off valve

AFК6-80х700 К1ХЛ

ОКК2-700-

245х324х426К1ХЛ

SUFА 12 Christmas tree control station is designed for:

- Christmas tree control (base valve, side valve)

- Underground shut-off valve control

- Shutting the well in the case of pressure increase at the

wellhead and depressurization of the discharge pipeline

Automated Christmas tree control system

11

Valve blocks

Connection unit for the pipeline and

methanol-pipeline

Block of the torch piping

Connection unit for test separators

Technological equipment for wells piping

12

0,00

10,00

20,00

30,00

40,00

50,00

60,00

70,00

80,00

2011 2012 2013 2014 2015

Потери газа за год Накопленные потери газа

Test separator

Gas losses prevention

Gas,

mil

lio

ncu

m

12,9 mm cum gas

7,8 mm cum gas

8,9 mm cum gas

17,3 mm cum gas

20,9 mm cum gas

Wells surveys without gas discharges into the atmosphere

13

Annual gas losses Accumulated gas losses

Diagram of LTS unit on UKPG-22

14

Development monitoring system

15

GCS

GIS-К

HWS

Core studies

Wells

clusterGas gathering

pipeline

UKPG Outer transport(GG

and OP)

continuous recording of P and

T

Telemetric data (Р,Т, Q)

Monitoring of P and T:Hydrating

Wax deposition

Balance of UKPG products

Commercial metering of

productsControl ofcomposition and

properties of UKPG products

Monitoring data SourceDevelopment

control

• Downhole parameters

Telemetry Adaptation ofthe single three-

dimensional model ofAchimov

deposits. Definingof technological

parameters ofthe feild

development

• Wellhead parameters

• Parameters of gathering and treatment system

• Service factors

• Output distribution per strata GIS-К

• Material balance of a gas production facility products Laboratory analysis

• Data on the composition and properties of productionwells

PGCS, laboratoryanalysis

• Output distribution per well Flow metering, HWS

• Cumulative HC production per areaCommercial

metering units

• Hydrodynamic characteristics of reservoir HWS, core

STRATEGY OF DEVELOPING ACHIMOV DEPOSITS OF

URENGOY REGION

16

1. OAO Gazprom, the Government of YANAO, TyumenNIIgiprogaz LLC and Gazprom dobycha Urengoy LLC

created a strategy of Achimov deposits development for Urengoy region. it is based on a single three-dimensional

model of the filtering of the main operational objects. The order of wells commissioning and the parameters of

their work was determined to ensure the specified gas output from deposits in view of interests of all subsoil users.

2. On the license areas of Gazprom dobycha Urengoy LLC it is planned to develop additional infrastructure on II

pilot area, as well as to start development of areas IV and V; III area is planned for development in 2019. Total

annual production of hydrocarbons from Achimov areas by 2025 will reach 35 billion cubic meters of gas and 10

million tonnes of condensate. Until 2030 Gazprom dobycha Urengoy will produce 434 billion cubic meters of

separation gas and 129 million tonnes of condensate.

3. Further development of Achimov deposits will require a method of wells drilling with a horizontal formation

penetration and multi-stage hydraulic fracturing.

4. Safety of wells operation is ensured due to automated Christmas tree control system. For the ease of installation,

maintenance and monitoring of the wells, production equipment sets of each well are made in modular pattern

of the individual blocks.

5. To ensure the ecological safety of the operation the following is used:

- energy-saving technologies for wells surveys without gas discharges into the atmosphere

- recirculation schemes of methanol supply in the process of low-temperature treatment of gas and condensate

- a technological scheme for industrial and domestic waste water joint treatment and injection into the reservoir.

17

Documents

26th World Gas Conference - International Gas Unionmembers.igu.org/old/IGU Events/wgc/wgc-2015/committee...1 –5 June 2015, Paris, France 26th World Gas Conference STRATEGY OF DEVELOPING