7″ Liner Cement Planning

08 September 2014

Dear Gents,

Please find below the cement planning and calculations for 7" liner for one of current wells which we will need a good cement job due to good reservoir :

1. Cement volume based on 4 arm caliper is 120bbls including ( shoe track, open hole with 35% excess , overlap 7& 9⅝" and 200ft above top of liner) , attached
2. Spacer 100bbls, 11.3ppg.
3. Displacement 283bbls.
4. Liner shoe at 4,114m  and TOL at 3,390m.

 Please note the following :

Formation fracture gradient using Poison ratio from DSI and formation density from run 1 log was calculated (attached) using equation. The data used in well simulation and showed the following :

1. Losses may occur at the end of the cement job after pumping 100bbls cement in the annulus. Based on that we recommend to add lost circulation fibers to the cement slurry and the spacer.
2. Reduce the displacement rate to 2 bpm will reduce the losses, check with thickening time
3. Pump Pressure at start cement job : 900 psi and will reduce to 0 psi due to the free fall and will start to increase after cement get out of the shoe till reach 300 psi at the latch of the dart with the liner wiper plug. The final displacement pressure will be 1780 psi at 2bpm. Bump plug to 2,500 psi.

My Question now :

are any other considerations need to be taken in order to get good cement job? taking into consideration that the drilling fluid is oil base mud 80/20

Regards
Ahmed

Documents uploaded by user:

7 in Liner Curves.png

Simulation.png

Poison Ratio.xlsx

Caliper.xlsx

8 Answer(s)

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