490 Final Presentation

Shale Reservoir CharacterizationALJOHOZUKA NATURAL GAS

A B D U L L A H A L S H A M M A S I

B R Y O N J O N E S

H I L L A R Y H O O P E R

D I E G O Z U I G N A

B R I A N K A N E

PNG 490 : INTRODUCTION TO PETROLEUM ENGINEERING DESIGN

4/26/16

Introduction Overall Goals:

◦ Determine total Original Gas In Place (OGIP)◦ Determine total CO2 Storage Capacity◦ Locations of large pay zones (Sweet Spots)

Importance: ◦ Allowed students to use real Petroleum Engineering data to achieve goals commonly found in the industry

◦ Gave students experience with actual field data

Commonly Used Terminology Langmuir Isotherm coefficients : Accounts for adsorption of Methane and CO2 to shale pore surfaces.

Monte Carlo Analysis: Analysis to account for uncertainties in method.

Kriging: Matlab function to interpolate and extrapolate values over a specific area.

P10, P50, P90: statistical probabilities of obtaining certain results, 10%, 50%, and 90 %, chance, respectively.

Outline

Conclusions and Questions

Achieved Goals

Monte Carlo Analysis

Methods

Method- Gross Pay• Discretization and Digitalization of Structural Maps- Grid 59x75

• Upload values into Matlab to produce Surface Maps of formation top and bottom- linear interpolation used

Method- Gross Pay

Method- Net Pay

• Digitization of Well logs • Gamma Ray- Shale formation• Obtain Bulk Density or Neutron Porosity,

And Resistivity values• Upscaling • Recorded values for upscaled intervals

Well 4 – Gamma Ray and Bulk Density

Method- Net Pay • Petrophysical Properties calculated from well log data

• Total Organic Content (TOC), Volume Fraction of Shale, Effective Porosity , and water saturation

• Various values assigned cutoffs • Effective Porosity < 0.02• Bulk Density < 2.45 g/cc• TOC <0

Method- OGIP and CO2 Storage • Using Petrophysical Properties OGIP and CO2 storage capacity can be determined at each well

• Gas Volume Formation Factor (Bg)• Temperature and Pressure • Langmuir Isotherm Coefficients

•Values interpolated in Matlab over entire field

Results-OGIP

Total OGIP: 14.12 trillion SCF

Sweet spot: at the bottom center

Lowest OGIP in the bottom right.

Results- CO2 Storage Capacity

Total Co2 Storage capacity: 14.58 trillion SCF

Highest capacity: at the bottom center

Lowest Capacity in the bottom right.

Monte Carlo Analysis

Monte Carlo AnalysisOGIP histogram CO2 Storage capacity histogram

Monte Carlo AnalysisOGIP P10, P50, P90 maps CO2 Storage capacity P10, P50, P90 maps

Discussion Confidence rises based on data and calculations.

Used all available and useful data.

The results of individual parameters (such as porosity and water saturation) are reasonable.

Porosity Water Saturation

Conclusion

• OGIP and CO2 storage capacity are 14.12 and 14.58 TSCF, respectively.

• OGIP and CO2 storage capacity show similar maps.

• OGIP and CO2 differ due to isotherm coefficients.