Casing Setting Depth using Bottom-Up Method for Development Well in the Offshore
| Main Author: | Sua Azi, Agustinus |
|---|---|
| Format: | Article info application/pdf Journal |
| Bahasa: | eng |
| Terbitan: |
Dili Institute of Technology
, 2020
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| Subjects: | |
| Online Access: |
https://tljes.org/index.php/tljes/article/view/3 https://tljes.org/index.php/tljes/article/view/3/4 |
Daftar Isi:
- Casing setting depth in drilling activities on onshore or offshore is an important aspect that must be planned. The selection of casing setting depths is based on the pore pressure and fracture pressure for the well and is usually available from offset well data. The method used in determining the casing depth is the top-down method and the bottom-up method. Generally, the top-down method is used in exploration drilling and the bottom-up method in development drilling. In certain cases, development drilling also uses the top-down method when complex formation conditions and abnormal pressure are encountered.Furak well is a development well with a depth of 442 ft of seawater and the distance from the rotary table to the seabed is 508 ft, including the category of deepwater wells. Based on the results of the pore-pressure and fracture gradient analysis and the determination of the casing setting depth using the bottom-up method, the results are obtained for the depth of each casing. Zero-point (0) to be calculated from the rotary table (RT). The depth of the conductor casing is 1010 ft with an equivalent mud weight of 8.5 ppg, the depth of the casing surface is 2495 ft with an equivalent mud density of 9.4 ppg, the depth of the intermediate casing is 6470 ft with an equivalent mud density of 10 ppg and a depth of production casing is 9810 ft with an equivalent mud density of 11.3 ppg.