Fines migration is the common formation damage mechanism in the sandstone reservoir of field B which has less established information on mineralogy distribution. There were many attempts to remediate the formation damage using conventional mud acid fluid system but resulted in mixed success rates. This situation warrant for the need for a modified acid recipe to avoid aggravation of fines migration problems in this field post acid treatment. This paper presents the pilot application of a modified HF acid recipe incorporating chelate. The paper also depict the evaluation process that includes candidate selection, laboratory workflow and results, treatment design, execution strategy and the post job analysis on well B-1S. In order to increase the acid stimulation success rate, the team analyzed numerous post job reports of the nearby wells that were previously treated with conventional mud acid system. The root causes of the previous job failures were identified, such as prolonged soaking of acid in the formation due to unplanned platform shutdown and limited platform deck space. Taking these factors into account, the modified HF acid system (with 1.0% HF) was selected for execution in B Field. The pilot execution resulted in double the production compared to the pre-treatment rate. The modified HF acid system has also improved the economics of the project due to its lower cost since it is a one-step system and has lower additives requirement.
Lapis aspal beton (Laston) sebagai bahan untuk konstruksi jalan sudah lama. Jenis perkerasan ini merupakan campuran merata antara agregat dan aspal sebagai bahan pengikat jenis perkerasan ini mampu memikul beban lalu-lintas berat di bandingkan Lataston. Batu kapur adalah batuan yang banyak ditemukan didaerah maybrat, pada umumnya batu kapur memiliki kualitas yang kurang baik untuk dipakai sebagai bahan pembuat jalan contohnya seperti nilai abrasi yang rendah memiliki struktur yang berpori dan beratnya cenderung lebih ringan. Penelitian ini bertujuan untuk mengetahui nilai uji marshall bila menggunakan batu kapur dan membandingkannya dengan material PT. Pro Intrtech Indonesia yang berada di sorong (saoka). Untuk mengetahui perbandingan nilai uji marshall, maka perlu dilakukan penelitan dengan cara menguji kedua jenis material tersebut dengan menggunakan variasi 4,5%, 5%, 5,5%, 6%, 6,5%. Material yang diuji pada penelitian ini adalah material PT. Pro Intertech Indonesia yang berada di saoka dan material batu kapur yang berada di quary ayawasi di daerah maybrat. Dari hasil penelitian diperoleh Perbandingan atau selisih dari pengujian marshall AC-WC di atas adalah sebagai : Kadar Aspal Optimum sebesar 0,05 %, Stabilitas sebesar 136 kg, Flow sebesar 0,6 mm, VIM sebesar 0,1 %, VFA sebesar 0,5 %, Marshal Quotient sebesar 170 Kg/mm, VMA sebesar 0,2 %, Density sebesar 0,025. Adapun nilai uji marshall kedua material tersebut masih memenuhi spesifikasi yang disyaratkan pada Spesifikasi Umum Bina Marga Tahun 2010 Revisi 3.
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