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# Advanced Drilling Engineering Group Project

## Advanced Drilling Engineering Group Project

### Part 1: Pore Pressure & Fracture Pressure Estimation

Table 1 shows the average bulk densities for a Miocene in the Tucano Region, Northeast Brazil. Assume an average matrix density of 2.60 g/cm3. The normal pore pressure is 0.452 psi/ft. Table 2 shows the interval-transit times for a prospect in the region. Figure 1 shows the assumed Poisson's ratio for the region.

• Determine an expression for the surface porosity (0) and the porosity decline coefficient (K).
• Determine the top of the transition zone.
• Determine the pore pressure curve using the equivalent matrix stress method. The average interval-transit time in the pore fluid is 210 s/ft. Use a margin of 0.8 lb/gal for the pore pressure gradient. Plot the resulting pore pressure gradient versus Depth (put Depth in the vertical axis, pointing downwards).
• Determine the formation fracture pressure curve using Ben Eaton's model (model presented in the course). Obtain Poisson’s ration from the graph in Figure 1 and overburden equal to 1.0 psi/ft on shales. Use a margin of 1.0 lb/gal for the formation fracture pressure gradient. Plot the resulting on the same graph of the item (3).

Depth Bulk Dens. ft g/cm³

0                             2.046

1000                          2.143

2000                          2.233

3000                          2.300

4000                          2.353

5000                          2.392

6000                          2.430

7000                          2.460

8000                          2.482

9000                          2.497

10000                        2.510

11000                         2.522

12000                         2.533

13000                         2.543

14000                         2.552

15000                         2.560

16000                         2.567

17000                         2.573

18000                         2.578

19000                         2.582

20000                         2.585

21000                         2.587

22000                         2.588

### for the Tucano Region.

 4000 to 5000 98 5000 to 6000 93 6000 to 7000 86 7000 to 8000 84 8000 to 9000 84 9000 to 10000 78 10000 to 11000 75 11000 to 12000 80 12000 to 13000 81 13000 to 14000 84 14000 to 15000 86 15000 to 16000 95 16000 to 18000 95 18000 to 20000 95 20000 to 21000 93 21000 to 22000 93

Table 2: Average interval-transit time for the Tucano Region.

Figure 1: Poisson's ratio for the Tucano region (assume overburden of 1psi/ft in shales).

## Cite This work.

Urgent Homework (2022) . Retrive from https://www.urgenthomework.com/sample-homework/advanced-drilling-engineering-group-project

Urgent Homework (2022) . Available from: https://www.urgenthomework.com/sample-homework/advanced-drilling-engineering-group-project

[Accessed 06/12/2022].

Urgent Homework . ''(Urgent Homework ,2022) https://www.urgenthomework.com/sample-homework/advanced-drilling-engineering-group-project accessed 06/12/2022.

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