DETAIL KOLEKSI

Evaluasi penanggulangan lost circulation pada pemboran trayek lubang 12¼ di sumur X lapangan Pramuka

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Oleh : Atika Kusumawati

Info Katalog

Nomor Panggil : 2151/TP/2013

Penerbit : FTKE - Usakti

Kota Terbit : Jakarta

Tahun Terbit : 2013

Pembimbing 1 : Widradjat Aboekasan

Subyek : Oil Well Drilling - Lost Circulation

Kata Kunci : evaluation of prevention, loss circulation, drilling holes 12¼ stretch, lapangan Pramuka


File Repositori
No. Nama File Ukuran (KB) Status
1. 2013_TA_TM_07109045_1.pdf 1852.72
2. 2013_TA_TM_07109045_2.pdf 352.11
3. 2013_TA_TM_07109045_3.pdf 627.89
4. 2013_TA_TM_07109045_4.pdf 1396.9
5. 2013_TA_TM_07109045_5.pdf 1349.99
6. 2013_TA_TM_07109045_6.pdf 392.33
7. 2013_TA_TM_07109045_7.pdf 697.14
8. 2013_TA_TM_07109045_8.pdf 3788.61

K Kehilangan sirkulasi merupakan salah satu masalah utama pada operasi pemboran dan harus ditanggulangi karena mempunyai resiko tinggi yang dapat menimbulkan waktu serta biaya pemboran bertambah. Secara umum ada beberapa teknik yang dapat digunakan untuk menanggulangi kehilangan sirkulasi ini seperti penggunaan LCM (Lost Circulation Material), Cement Plug, Operasi Blind Drilling, dan Aerated Drilling. Pada pemboran sumur X di lapangan Pramuka, masalah yang terjadi adalah terjadinya hilang lumpur (lost circulation). Berdasarkan data dan analisis, faktor terjadinya masalah hilang lumpur yang sering terjadi di sumur- sumur lapangan Pramuka adalah adanya rekahan-rekahan alami (natural fracture) dan adanya gua-gua (cavernous). Pemboran Sumur X menembus Formasi Top Soil, Formasi Cisubuh, Formasi Parigi, Formasi Cibulakan Atas, Formasi Baturaja dan Formasi Talangakar. Lost circulation pada trayek lubang 12 ¼ terjadi ketika pemboran menembus Formasi Cibulakan Atas. Pada pemboran trayek lubang 12 ¼ terjadi sebanyak 3 (tiga) kali loss pada sumur X dengan jenis partial loss. Tidak ada masalah pada saat melakukan proses pemboran lubang sampai kedalaman akhir trayek 12 ¼ di 5968,14 ft MD/ 5754,87 ft TVD, namun pada saat dilakukan pencabutan rangkaian terjadi stuck pipe yang kemudian menyebabkan loss. Metode penanggulangan yang dilakukan untuk mengatasi lost circulation Circulation Material (LCM) dengan jenis Calcium Carbonat (CaCO3), Diesel, dan Kwikseal. Penanggulangan masalah lost circulation yang dilakukan pada Sumur X trayek lubang 12 ¼ di beberapa zona loss secara keseluruhan telah dilakukan dengan baik, walaupun lumpur tidak sepenuhnya kembali ke permukaan tetapi rate loss berkurang secara signifikan dan tidak ada masalah saat pemasangan dan penyemenan casing 9 5/8. Namun demikian, target kedalaman akhir yang diinginkan (zona produktif) telah dicapai

L Lost circulation is one of drillings main complications. Lost circulation must be handled because of its high risk to increase the drilling duration and cost. In general, there are several techniques to handle the lost circulation: the application of LCM (Lost Circulation Material), cement plug, blind drilling operation, and aerated drilling. The problem occurred in the drilling process of Well X in Pramuka Field is lost circulation. Based on the data and analysis, the main factors that induced the lost circulation situation are the existence of the natural fractures and cavernous. The drilling of Well X penetrated The Top Soil Formation, Cisubuh Formation, Parigi Formation, Upper Cibulakan Formation, Baturaja Formation and Talangakar Formation. Lost circulation of the 12 ¼ hole section drilling process occurred when the drilling process penetrated the Upper Cibulakan Formation. Three times partial losses were occurred in the drilling of the 12 ¼ hole section in Pramuka Field. There was no complication occurred in the drilling process of the 12 ¼ hole section until the greatest depth of 5968,14 ft MD/ 5754,87 ft TVD. Nonetheless, when the structure series were detached, stuck pipe situation happened. This situation will lead to the loss. The handling method to overcome the lost circulation of the Well Xs 12 ¼ hole section was by plugging the hole with Lost Circulation Material (LCM). The materials used were Calcium Carbonat (CaCO3), Diesel, and Kwikseal. The lost circulation handling of Well Xs 12 ¼ hole section in several loss areas were well operated. Though not all the mud returned to the surface, the rate loss was decreased significantly and there was no complication while processing the installation and the cementing of 9 5/8 casing. However, the desirable end depth (productive zone) has been accomplished

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