New Developments and Special Experiences in Geoinform s Well Testing Services

Transcription

1 New Developments and Special Experiences in Geoinform s Well Testing Services Peter Baranyi Chief Engineer, GEOINFORM Ltd.

2 Services provided by Geoinform, Well Testing Technologies Surface WT: standard equipment 1st step of development: extremely high H2S content of gases 2nd step of development: HP and high H2S content of gases Development of EPF or ExWT equipment Special solutions (Well Site Separation and Flaring)

3 A Brief Summary of Geoinform Services ISO 9001 Certified, ISO and OHSAS 1801 under certification Seismic Data Processing Well Testing OH and CH Wireline Services (Logging & Perforation) Slickline Services Mud Logging VSP

4 International Coverage

5 International Coverage (WT Services) WT Base (Algyő)

6 Meaning of Well Testing We attempt to answer questions such as Does this zone produce oil or gas? How much? What type? For how long will the well produce and at what pressure? Is it worth spending more and more money on the well to increase the production? Well Test data and information are essential for experts working in exploration and production technology, as well as for reservoir engineers working with the reservoir. The subject of this presentation is the last year development of our surface well testing service s equipment and our experiences in a remote operation where the H2S and CO2 content of the produced gas was extremely high: 40% and 20% respectively

7 Our Well Test Technologies Downhole pressure and temperature survey SURFACE WELL TESTING EARLY PRODUCTION AND EXTENDED WELL TEST Sampling operations Echo- and dynamo-metering Sand monitoring (solid content determination) Installation of permanent pressure and temperature measuring systems Evaluation and interpretation of measured data Drill Stem Test (DST)

8 Services provided by Geoinform, Well Testing Technologies Surface WT: standard equipment 1st step of development: extremely high H2S content of gases 2nd step of development: HP and high H2S content of gases Development of EPF or ExWT equipment Special solutions (Well Site Separation and Flaring)

9 Standard Surface Well Test Equipment Flow Head Emergency Shut-Down (ESD) system High pressure pipelines and data header Choke manifold Indirect-fired Heater Test separators w/surface data acquisition system Low pressure pipeline system Oil and gas manifold Surge tank Gauge tank Flare system Lab container Accessories (Power supply, lighting system, compressors, generators, chemical and transfer pumps)

10 Flow Head 4-valve configuration.; master-, wing-, swabvalves. One of the wing valve is hydraulic operated Size; 3 1/16 ; WP; 10K, Max Lifting Load; 400,000lbs (180tons). It should be able to support the full string weight. Swivel; allows rotation of the string w/o rotating the FH Sour gas service!

11 Emergency Shut-Down (ESD) System ESD (Emergency Shut Down) System is used for automatic closing of gate valves on wellheads and flow lines under emergency conditions Equipment; hydraulic actuator & revers acting gate valve; Solenoid valve, Pressure pilots and transducers, controlling panel (PLC), shut-down buttons

12 Piping Up and Downstream piping; High and low pressure pup joints (w/heated jacket), elbows, Xovers, adapters etc. Data header: into which pressure and temperature measuring gauges can be inserted; they are also suitable for sampling and chemical injecting operations. Weco connections (Fig 1502, 206);

13 Choke Manifold The choke manifold is a means of quantity adjustment for the well stream (through fixed and adjustable choking). 5K or 10KPsi gate valves w/ fix and adjustable chokes Diameter: 2-3

14 Indirect-fired Heater and Boiler Units 3 /5KPsi piping inside w/ adjustable choke Vessel for water bath at atmospheric pressure Diesel and/or gas burner External circulation pump Heating capacity: 2 MMBtu/hr Hot water; 95degC Heating capacity; 450KW Circulation pump; Grundfos Pmax; 2bar Diesel burner

15 Design principles: Easy to operate Automatic and manual control (fail safe) ESD valve at the inlet Bypass lines (metering devices) Separation of liquid phases: 2 rooms divided by the weir. Test Separator (3 phase/100bar) The oil sitting on top of water will pass over the top of the weir and goes into the oil compartment

16 Separator Controlling and Transducers PLC based controlling and Data Acquisition system Level-controlling system: 3 and 2 phase sensitive Guided Radar transducers, Fisher Dump valve: manual and automatic driven (EP converter box). Gas volume; Daniel orifice box and/or Vortex Liquid volume; turbine meter Adjustable choke; to set the pressure of the separator Pressure and temperature transducers (4-20mA)

17 Surface Data Acquisition System The system is able to sample each data point at a minimum of 5 second intervals and allow monitoring in real time on site on a screen. It is possible to reproduce hard copies of data on site. Pressure sensors shall have an accuracy of 0.1% of full scale reading (differential pressure: 0.075% of full scale) and temperature sensors an accuracy of 0.5 C Separator pressure and temperature is recorded automatically

18 Oil and Gas Diverter Manifolds WP; 1440Psi (100bar) ND; 3 (oil) and 4 (gas) Sour gas service

19 Surge Tank (pressurized) to store liquid hydrocarbons after separation to measure liquid flow rates to calibrate the separator metering devices WP; 16bar Gauge Tank (atmospheric) to store liquid hydrocarbons after separation to measure liquid flow rates 2 section boxes Dual compartment Level metering manually checked Sight glasses indicators Surge and Gauge Tank

20 Lab container RANAREX Portable Gas gravimeter, Heated Centrifuge, Glass centrifuge tubes (10 ml), Liquid density meter, Multi Gas detector (H2S, CO, O2, N, etc ), H2S personal detector, Digital thermometer, Glass beaker set, Graduated Cylinder (1000 ml, plastic), Mercury manometer, Range of pressure gauges, thermometers PH test tape, Digital PH meter, Manual centrifuge, Centrifuge glass (10ml, 20pcs/set), Beaker set (different capacity (100ml - 750ml), Salinity (chloride) kit, Chemical inhibitors, demulsifier (emulsion breaker).

21 Burner and Flare system 3 x18ft, 4 x18ft, 6 x40ft

22 Accessories Power supply and lighting system Compressors Generators Office, crew, storage containers Chemical injection pumps Transfer pump systems Gauges, Well Head Recorders, Black Chart Recorders Consumables

23 Typical layout

24 Services provided by Geoinform, Well Testing Technologies Surface WT: standard equipment 1st step of development: extremely high H2S content of gases 2nd step of development: HP and high H2S content of gases Development of EPF or ExWT equipment Special solutions (Well Site Separation and Flaring)

25 Surface Well Test Advanced Package (extremely high H2S, Pmax=10K) Sample taking: use breathing apparatus, training, H2S alarm system Upstream piping: NO threaded connection and elastomers! Only steel-onsteel (flanged)! Coflexip hoses from the flowhead Heater: in the upstream! Gauge tank: NO! Only surge tank! Burner and Flare stack: as far as possible, tubing lines Install 2 sets of burners, 3 air compressors (800scfm/each) 8 x60 ft flare stack w/3x4 vent lines up 150 joints of 3-1/2 PH-6 (BTS-6) to make up 3 more lines going to the main burnpit and flare stack area (5x300m!) Certified NACE welded piping for all HP gas and oil lines for downstream Weco union is ok for downstream of choke manifold.

26 The Scope changed

27 P&ID (extremely high H2S, Pmax=10K)

28 Rig up

29 Flare stack

30 Services provided by Geoinform, Well Testing Technologies Surface WT: standard equipment 1st step of development: extremely high H2S content of gases 2nd step of development: HP and high H2S content of gases Development of EPF or ExWT equipment Special solutions (Well Site Separation and Flaring)

31 Surface Well Test Advanced Package (high H2S and CO2, Pmax=15K) HP Upstream side (15KPsi) Coflex hose (flanged) HP flange piping Choke Manifold Downstream side 10K Heater, 3 phase/100bar Separator Welded LP pipes Surge tank (NO gauge tank) 60ft flare (four line) Two BURNER 3 AIR Compressor (+two spare) All vent line are connected to the flare system 3x 500 m LP piping for the flare system Special Oil diverter

32 P&ID (high H2S, Pmax=15K)

33 Surface Equipment Layout (high H2S, Pmax=15K)

34 LP Piping, Compressors and the Burner

35 Services provided by Geoinform, Well Testing Technologies Surface WT: standard equipment 1st step of development: extremely high H2S content of gases 2nd step of development: HP and high H2S content of gases Development of EPF or ExWT equipment Special solutions (Well Site Separation and Flaring)

36 Extended Well Test A particular well is put into production as quickly as possible while the final surface technology is completed, thereby improving return of the investment. Well Testing performed during the production and the data acquisition helps in designing the final technology, thereby minimizing the risks and the expense. EWT also provide a way to test sand control techniques and process- and production-related technologies. Such testing minimizes risks related to developing a field for long-term, sustained production.

37 Specific Extended Well Test System 2 pcs 10KPsi upstream manifolds 1 ps upstream SKO 1 pc upstream flow diverted 1 pc 5KPsi downstream manifolds 1 pcs 5Kpsi downstream ESD 1 pc second separator (solid content) Upstream side heated jackets Downstream side 5KPsi heater 2 pc 100m 3 storage tank 1 pc 50m 3 storage tank 1 pc 30m 3 gauge tank 1 pc 16m 3 surge tank 1 pc 20 m 3 tank (for sand)

38 Equipment Layout (Ex. Well Test)

39 P&ID Extended Well Test

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41 Services provided by Geoinform, Well Testing Technologies Surface WT: standard equipment 1st step of development: extremely high H2S content of gases 2nd step of development: HP and high H2S content of gases Development of EPF or ExWT equipment Special solutions (Well Site Separation and Flaring)

42 Well Site Separation & Flaring Facility Design: Total production volume: 8,500 bbl/day, Natural gas: 600 GOR Oil production volume: 5,000 bbl/day Crude Oil Water production volume: 3,500 bbl/day Formation Water ESD + control panel, HP&LP piping, Choke manifold, gas and oil diverters 2pcs of indirect Heaters Production Separator (3 phase 16m3, WP 5bar, Knock Out Drum (10m3, 2 phase, function: to separate liquid from waste gases) Flare stack (large capacity Nm3/h, ignition system, 60ft, 6 ) Slop tanks (function: collection of drains form technology) Special recover, transfer, oil, pre-start pumps Surge tank (16m3, 16bar, magnetic level indicator)

43 Well Site Separator & Flaring Facility

44 SUMMARY Lessons learned: Safety at first! Customers needs are always increasing. Support the customer before, during and after the project. Well Test has to be carried out even in harsh physical environment (H 2 S, CO 2, HP ) Even the most advanced equipment could be operated by well trained and committed people only. Keep improving your technology. Lead the development, maintain good relationship with your suppliers. Availability is important to maintain reputation and stay in the business.

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