Reservoir CharacterizationCapstone Project Semester 1

PNG 490 – Team 26April 29th 2014

Goals and Objectives

• Discretize and map the given formations

• Analyze log data

• Calculate expected recoverable oil in place

• Recommend further action with the field

Findings

• Based upon the data:

• 100 - 270 Million Barrels

• 100 Dollar per Barrel comes out 10 – 27 Billion Dollars

• Further develop the selected area

Procedure

Using generated data & 3 D models to determine sweet spots

Interpolated values to entire reservoir

Establish max, min & avg: water saturation & porosity

Analyzed log data on 29 wells

Digitalized formation topography

Field discretization

Client received request for field analysis

Geological Structure

• Penta Alpha was formed in the early cretaceous period

• Predict the ability to produce oil• Types of lithology• Limestone , sandstone, and minimal shale deposits

• Types of obstacles • Drilling Break, and kick

• Pay zone rocks• Sandstone

Discretization Process

• Analyzing contour map

• Drawing grids

• Construct surface map

• Surface Map of Penta Alpha Formation

3-D Surface MapSurface Map of Penta Alpha Formation

Evaluating Well logs

• Establish cut-offs• Water saturation < .7 or 70%• Gamma ray < 40 API • Resistivity > 10 ohm-meters

• Determine Net Pay

Well log data gathering

• From porosity, water saturation and net pay thickness

• Determine maximum, minimum and average values

• Three distribution maps of porosity, water saturation and net pay thickness

Average Water Saturation Interpolation

Average Porosity Interpolation • Average Porosity Interpolation

Net Pay Interpolation• Net Pay Thickness Interpolation

Monte Carlo Stimulation

• Calculate Values within set ranges for: • Recovery Factor of 0.2 to 0.4 • Formation Volume Factor of 1.05 – 1.08

• Calculated OOIP ranged • 375 – 675 million barrels

• Calculated recoverable oil • 100 – 270 million barrels

Moderate Estimate (50% confidence)

Conservative Estimate (90% confidence)

Area of Interest

• Determine the areas with higher barrels per acres from recoverable oil in place

• P50 stimulation • area of 3643 acres and produce around 34 million barrels.

• P90 stimulation• area of 3643 acres and produces around 18.5 million barrels

Area of Interest 50 Percentile

Area of Interest 90 Percentile

Cumulative Oil in Place

Cumulative Recoverable Oil

Conclusion• Valued at approximately 10 – 27 billion US Dollars

• A well drilled every 640 acres should be suitable in this situation

• Potential revenue should be attributed to a water saturation cut off of 70%

• Recommend entering phase two of drilling and preparing wells for production

Reference

• Alsharhan, A.S., and A.E.M. Nairn. Sedimentary Basins and Petroleum Geology of the Middle East. N.p.: Elsevier Science & Technology, 1997. Print.

• Canty, Daniel. "Enhanced Oil Recovery Leaders in the Middle East." Arabianoilandgas. ITP Bussiness Publishing Ltd., 11 June 2012. Web. 17 Apr. 2014.

• Doveton, John H. "Basic Well Log Analysis: Reading Rocks from Wireline Logs." SEPM Shore Course No.29. 7 Apr. 2014. Lecture.