Thermo-Gaso-Chemical Enhanced Hydrocarbon Recovery (TGC-EHR) Method 1.
-
Upload
leticia-bonfield -
Category
Documents
-
view
238 -
download
4
Transcript of Thermo-Gaso-Chemical Enhanced Hydrocarbon Recovery (TGC-EHR) Method 1.
Thermo-Gaso-ChemicalEnhanced Hydrocarbon Recovery
(TGC-EHR) Method
1
TGC-EHR – ResultsProduction yields increasedincreased (↑)(↑)
consistently by a factor of 3x3x to 10x10x ++
Continuous stable/sustainableContinuous stable/sustainable flow of increased oil & gas production for long
period (years)++
In specific cases the production yields increasedincreased (↑)(↑) by a factor of 30x30x
2
TGC-EHR – Sample Field TreatmentsField Year Type Pre-Treatment Post-Treatment Gain Status
E. Poltavskoye Ukraine 1997 Gas 2 wells plugged/inactive since 1976 due to very low output
Well #9 - 35,845m3, 4,532m3 of condensate Well #14 - 22,320m3, 2,840m3 of condensate
35,845m3
22,320m3
Continuous until re-plugged 2001
Perm AreaRussia
1998 Oil 4.7 m3 water free oil/day
14.1m3 water free oil/day (three fold increase)
9.4m3/day 8 years of sustained production
Bugrevatovskoye Ukraine
1998 Oil 2.6m3/day with 80% water content/cut
26m3/day with 20% water content/cut (10 fold increase)
23.4m3/day At present 15m3/day
LevintzovskyUkraine
1999 Gas 12,000m3/day 120,000m3/day (10 fold increase)
108,000m3 /day
90,000m3/day
KorobochkinskoyeUkraine
2001 Gas 5,000m3/day 160,000m3/day (30 folds+ increase)
155,000m3/ day
8 years sustained production
OklahomaUSA
2004 Gas& Oil
3 Oil and 1 Gas well 5-6m3/day
Asked to do more wells Immediate Pressure/Gusher
Continuous
Daquing Oil FieldChina
2009 Oil 2.6m3/day – 1st well 5.4m3/day – 2nd well
10.6m3/day – 1st well 17.6m3/day – 2nd well
8m3/day 12.2m3/day
Continuous as of June 2010
Barsy GelmesTurkmenistan
2010 Oil 0.0m3/day – 1st well 12 m3/day – 2nd well8 m3/day – 3d well
13.5m3/day – 1st well 37m3/day – 2nd well28m3/day – 3d well
13.5m3/day 25m3/day20m3/day
Continuous as of March 2011
Commonly Adopted EHR Methods Thermal Recovery (Temperature)Decreasing (↓) the VISCOSITY of oil to improve outflow
Gas Injection (Gas + Pressure)Increasing (↑) the FORMATION PRESSURE + Decreasing (↓ ) the VISCOSITY of the oil
Water Chemical Injection (Chemical + Pressure)Decreasing (↓) the VISCOSITY of oil, Increasing (↑) the VISCOSITY of water (e.g. by increasing salt concentration) or Decreasing (↓) the CAPILLARY PRESSURE of oil
Hydraulic Fracturing (Pressure)Forming fracture in the formation, hence Increasing (↑) the PERMEABILITY of the rock
Acidization (Chemical)Increasing POROSITY and PREMEABILITY of the formation
4
TGC-EHR – The Method
Thermo-Gaso-Chemical Enhanced Hydrocarbon Recovery (TGC-EHR)
The TGC-EHR method synergistically combines the key effects of previously adopted methods as well as the novel
ones, never applied before
5
TGC-EHR – Multifunctional Effects
6
1) Temperature2) H, H2
3) Prop. IP4) Prop. IP
20 in-situ sustained reactions
• Existing (Common)• Modified Existing• New
* Combines multiple chemical and physical effects. Some are similar to those of other treatments and others unique to TGC-EHR
Minutes to Hours
Months
Years(Self Sustained)
- Cracking- Pyrolysis- Hydro-cracking
TGC-EHR - Key Effects (Existing)
1. Pressure
2. Temperature
3. Gas
4. Fractures
5. Chemical/Acidization
7
TGC-EHR - Key Effects (New)
8
1. Combustion Gases Disruption of Clathrates
2. Hot Hydrogen (Atomic & Molecular) In-situ Cracking
3. Hot Hydrogen (Atomic &Molecular) In-situ Pyrolysis
4. Combustion Gases Micro-fracturing
5. Combustion Gases Hot Acidization
6. Combined Effects Water Cut Reduction
Much More Complete Recovery Much More Complete Recovery (Complete Recovery in Lab, One Promising Field Test)(Complete Recovery in Lab, One Promising Field Test)
TGC-EHR – Water Cut Reduction In well #68 in Bugrevatovskoye oil field (Ukraine),
water cut decreased from 80% to 20%80% to 20% and oil recovery increased 10 fold.
Through: Increased oil output resulting from unplugging
pores containing oil, reducing oil viscosity and other mechanisms.
Water reacts with treatment mix to release hydrogen and other gases, which, in turn, block some of the pores in the rock containing water.
9
TGC-EHR – Water Cut Reduction
10
Oil - water contact
BO +H2O -> B2O3 + H + QBO +H2O -> B2O3 + H + Q
Combustion Gases
Paraffin Cracking & PyrolysisParaffin Cracking & PyrolysisBO +H2O -> B2O3 + H + QBO +H2O -> B2O3 + H + Q +
⃝6 ⃝6 ⃝6 ⃝6
Study of the effects of atomic hydrogen on the reservoir rock
Study of the effects of hydrogen on permeability and diffusion properties of reservoir rock
Study of the combustion of metal-based fuel components
Study of kinetics of hydro-reactive mixtures reacting with water at pressures up to 60 MPa
Experimental modeling of hydro-cracking and cracking-pyrolysis of heavy hydrocarbons treated with the combustion gases of hydro-reactive and combustive-oxidative mixtures.
Study of heat and gas release from hydro-reactive samples (rod-shaped in cylindrical chamber)
TGC-EHR – Research Experiments
11
12
Outlet for gas chromatography sample
Specimen
Pressure gauge
Seal
Isolation
Thermal cable
Argon
Temperature gauge
Generator of model gases
CO2
H2
Hydrogen gas generator
Т=80 ºС
Hydrogen affects permeability and diffusion properties of reservoir formation
TGC-EHR – Custom Test System
TGC-EHR – Hot Hydrogen Impact
13
Untreated SampleSample treated by Hot Molecular Hydrogen
Sample treated by Hot Atomic Hydrogen
Results after mechanical stress
TGC-EHR – Hydro-cracking Study
14
Of heavy hydrocarbons treated by Combustion Gases
Asphalt-Paraffin Treated By Combustion Gases
TGC-EHR –
15
Infrared spectrum of Parrafin before and after treatment by Combustion Gases
TGC-EHR – Key Advantage
Simplicity of executionSimplicity of executionOperational Requirement
• Pump Unit (500 hhp would be sufficient)
• High Pressure Iron
• Batch Mixer (100 bbls capacity)
• Coiled Tubing Unit (if required in horizontal wells)16
TGC-EHR - Process
17
Step I1.Fill well with water (well is suppressed via hydrostatic pressure)
2.Extend pump tubing down to the bottom hole
3.With wellhead closed, pump. Reagent Mixture 1 (a solution with specific gravity 1.2 – 1.3 grams per cubic centimeter).
* All chemical reactions take place within the well bore or in the reservoir and require no external pressure or heat sources making it a very economical and effective EHR method.
TGC-EHR - Process
18
Step II1.Lift tubing slightly above perforated zone (20 meters above the uppermost perforations).
2.Pump Reagent Mixture 2, which contains hydro-reactive compositions (HRC) and combustible oxidizing mixtures (COM) in a buffered solution with specific gravity 1.6 – 1.62 grams per cubic centimeter.
Make sure that all of Reagent Mixture 2 exits the tubing into perforation zone.
TGC-EHR - Process
19
Step III1.Lift tubing slightly above perforated zone (20 meters above the uppermost perforations).
2.Pump Reagent Mixture 2, which contains hydro-reactive compositions (HRC) and combustible oxidizing mixtures (COM) in a buffered solution with specific gravity 1.6 – 1.62 grams per cubic centimeter.
Make sure that all of Reagent Mixture 2 exits the tubing into perforation zone.
TGC-EHR - Process
20
Step IV1.Tubing is extended down to the upper the boundary of perforated zone.
2.Reagent Mixture 3 is pumped and injected in the formation by displacing it with water.
Reagent Mixture 3 neutralizes and clears colloidal systems that form after treatment.
TGC-EHR – HSE (Health, Safety, & Environment)• Environment Research Study conducted in 2001 by Ministry of Education and Science of Ukraine.
• US oil experts conducted an assessment of the chemicals used in the TGC-EHR in 2004. As a result, we were granted permission and performed oil well treatment in US.
• Chinese oil industry experts conducted an experimental study of the environmental impact using a model system in 2009. The study included sampling and analysis of chemical intermediates and end products of the technology. As a result, we were granted permission and performed oil well treatments in China.
21
TGC-EHR – HSE (Health, Safety, & Environment)a) Combustive reactions can only occur after the chemicals have been delivered to
the productive zone of the well.
b) Standard safety procedures for handling chemicals.
c) No chemicals detrimental to the environment are used.
d) The amounts of chemicals are relatively small. Therefore significant release into environment cannot occur even in the event of mishandling.
e) Gases released during combustion (hydrogen, nitrogen, nitrogen oxides, carbon oxides) are also common in natural geochemical processes and are inherent in geological fluids such as ground/underground water, natural gas and oil.
f) Non-gaseous reaction products (aluminates, lithium borates, aluminum borates) are salts that are readily hydrolyzed and washed out, which is safer than hydrochloric and hydrofluoric acids widely used in conventional well treatments.
22
TGC-EHR – Well Info. Needed• Well history, geology/geophysics survey data.• Well design/type data (borehole/casing diameters, etc.).• Productive horizon depth.• Well depth, current well bottom location.• Perforation interval (filters).• Perforation density.• Well production/output history.• Chemical composition of the hydrocarbons, water and rocks in the horizon.• Porosity/permeability of the strata (overall data for the oil field would suffice if necessary); pressure and temperature data.• Daily output of fluid (oil, gas, condensate).• Proximity of ground water.
23
TGC-EHR – Adapting to Reservoir
24
Crack Forming Regime (recommended for hard, low permeability reservoir formations)
•Most of the chemical energy is released in the borehole, generating high pressure and temperature: up to 105.0 MPa and temperature up to 820°C.
•The gases are released in pulses, in 3 consecutive reactions, over 1 – 120 seconds. Rock fracturing is possible. (Depending on the condition of the well casing and cementing, the temperature and pressure can be significantly reduced if needed)
TGC-EHR – Adapting to Reservoir
25
Regime for removalof heavy asphalts-tars-paraffins, cracking-pyrolysis of long-chain hydrocarbons, breakdown of carbon-carbon bonds,
hydrocracking
•Gases are released in 4 phases, forming incomplete oxidation products. Most of the chemical energy is released in the formation, where breakdown of heavy hydrocarbons leads to release of methane, ethane, propane and other light fractions.
•Under such conditions, carbon participates in reaction that release hydrogen. There are indications that chain reactions are involved and the process may be self-sustaining and continue for several years.
TGC-EHR – Adapting to Reservoir
26
Regime for short-term combustion inside reservoir formation
•Reactions proceed sequentially, without abrupt spikes in pressure and temperature. In the presence of strong oxidizers, combustion in the reservoir proceeds via forming of coke, whose presence largely determines the dynamics of combustion.
•The duration of this short-term combustion phase depends on the amount of oxidizers used and, on average, is 48 hours.
TGC-EHR – Adapting to Reservoir
27
Regime of non-combustive oxidation and hot acid/alkaline treatment
(recommended for formations with high permeability and high water content)
•Involves injection of combustive-oxidizing mixtures and hydro-reactive mixtures into formation.
•The reactions occur inside the formation at relatively low temperatures (at or slightly above the formation’s temperature).
29
30
31
TGC-EHR – Sample Field TreatmentsField Year Type Pre-Treatment Post-Treatment Gain Status
E. Poltavskoye Ukraine 1997 Gas 2 wells plugged/inactive since 1976 due to very low output
Well #9 - 35,845m3, 4,532m3 of condensate Well #14 - 22,320m3, 2,840m3 of condensate
35,845m3
22,320m3
Continuous until re-plugged 2001
Perm AreaRussia
1998 Oil 4.7 m3 water free oil/day
14.1m3 water free oil/day (three fold increase)
9.4m3/day 8 years of sustained production
Bugrevatovskoye Ukraine
1998 Oil 2.6m3/day with 80% water content/cut
26m3/day with 20% water content/cut (10 fold increase)
23.4m3/day At present 15m3/day
LevintzovskyUkraine
1999 Gas 12,000m3/day 120,000m3/day (10 fold increase)
108,000m3 /day
90,000m3/day
KorobochkinskoyeUkraine
2001 Gas 5,000m3/day 160,000m3/day (30 folds+ increase)
155,000m3/ day
8 years sustained production
OklahomaUSA
2004 Gas& Oil
3 Oil and 1 Gas well 5-6m3/day
Asked to do more wells Immediate Pressure/Gusher
Continuous
Daquing Oil FieldChina
2009 Oil 2.6m3/day – 1st well 5.4m3/day – 2nd well
10.6m3/day – 1st well 17.6m3/day – 2nd well
8m3/day 12.2m3/day
Continuous as of June 2010
Barsy GelmesTurkmenistan
2010 Oil 0.0m3/day – 1st well 12 m3/day – 2nd well8 m3/day – 3d well
13.5m3/day – 1st well 37m3/day – 2nd well28m3/day – 3d well
13.5m3/day 25m3/day20m3/day
Continuous as of March 2011
Thank you for your attention
33