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Ditemukan: 18 dokumenTRANSIENT DYNAMIC APPROACH FOR CONTIUOUS GAS LIFT DESIGN IMPLEMENTATION IN OFFSHORE OIL WELL "MESS-1"
This study focuses on the continuous gas lift design for well “MESS-1” using a transient dynamic approach. A sensitivity analysis is conducted based on gathered data to evaluate the impact of various variables on fluid behavior within the wellbore. The main variables analyzed through transient dynamic modelling include the lift-gas injection rate, pressure, and tubing outer diameter (OD). The continuous gas lift system derived from steady-state modelling, serves as the basis for input into the transient dynamic model. This model will be evaluated based on day-to-day behavior over a 7 days period. The goal is to understand how these variables affect fluid behavior within the wellbore, providing insights that can enhance the efficiency and effectiveness of the gas lift design for well “MESS-1.” The optimum result from the transient dynamic model indicates an injection depth of 3000 ft MD using 2 7/8" tubing OD, with an injection pressure of 1200 psia and an injection rate of 1 MMSCF/day through 0.5” injection port. This configuration results in a more stable flow, with less flow pattern fluctuation and a dominant dispersed bubble flow pattern. Further optimization is possible by implementing other artificial lift methods, such as an Electric Submersible Pump (ESP), to provide even more stable flow and reduce the decline rate. However, it may result in a slightly lower day-to-day rate. This approach enables engineers to design gas-lift systems with greater precision and accurately predict the system's optimal range and fluctuations throughout its operational life.
STUDI NUMERIK PENENTUAN NILAI FAKTOR MODIFIKASI RESPONS PADA STRUKTUR DINDING BATA TERKEKANG DENGAN PERKUATAN
Sebagian besar bangunan hunian dan umum seperti masjid dan sekolah di Indonesia merupakan bangunan dinding bata kategori non-engineered building. Risiko kerubuhan bangunan tersebut cukup besar mengingat bahwa potensi gempa di Indonesia juga sangat besar. Untuk mengatasi hal tersebut, diperlukan perencanaan perkuatan bangunan dinding bata terkekang termasuk jenis perkuatan dan aspek kegempaan yang dapat diterapkan dalam desain tahan gempa, salah satunya koefisien modifikasi respons. Dari berbagai metode perkuatan yang dapat dilakukan, diperlukan pengklasifikasian dengan meinjau pola kegagalan yang dihasilkan ketika struktur dinding bata terkekang diberi perkuatan tersebut. selain itu, ditinjau aspek desain seperti kekuatan dan daktilitas agar dapat ditentukan faktor modifikasi respons yang sesuai dalam mendesain struktur tersebut. Pada penelitian ini, dilakukan evaluasi terkait nilai koefisien modifikasi respons dan pengaruh pemberian perkuatan pada dinding bata terkekang tanpa detailing dengan dua metode, yaitu metode grafis dan metode analisis respons dinamik. Spesimen acuan atau benchmark pada penelitian ini yaitu spesimen dinidng bata terkekang dengan detailing balok-kolom dan kolom-dinding yang baik. Metode pertama meninjau disipasi energi sistem inelastis hasil pengujian untuk menentukan kekuatan sistem elastis dengan disipasi energi yang sama. Metode kedua meninjau respons dinamik menggunakan metode Newmark-Beta berdasarkan 10 data percepatan gempa dan data input spesimen hasil pengujian yang dilakukan pada penelitian-penelitian sebelumnya. Berdasarkan data yang ada, diperoleh dua kategori perkuatan berdasarkan pola kegagalan yang dihasilkan yaitu kategori pertama dominan strut diagonal dan kategori kedua dominan sliding shear. Perkuatan kategori pertama yang terdiri dari angkur menerus dan balok lintel direkomendasikan sebagai perkuatan tambahan karena mampu mendisipasi energi yang cukup besar, dibuktikan dengan hasil nilai faktor modifikasi respons yang mendekati spesimen good detailing.
AN INTEGRATED APPROACH TO PRODUCTION OPTIMIZATION FOR FIELD “Z”: THE USE OF DYNAMIC SIMULATION AND ANALYTICAL METHODS
Indonesia’s rapidly increasing demand for crude oil has surpassed 1.6 million barrels per day (MBOPD). Recognizing this urgent demand, the Indonesian government, through the Ministry of Energy and Mineral Resources, has set an ambitious target to produce 1 MBOPD by 2030. An innovative and efficient approach is required to achieve this target, with field development being a key strategic focus. This field development aims to maximize hydrocarbon production effectively and economically. This study focuses on developing the field at the primary recovery stage by comparing analytical and simulation calculations. The analysis is conducted on a static model of field "Z," which has 23.43 MMSTB of oil in place and 9 active wells. The analytical method calculates the Estimated Ultimate Recovery (EUR), drainage radius, and Recovery Factor (RF) for the existing wells and determines the number of wells that can be infilled. These results are then compared with simulation outcomes. The 3D dynamic simulation method uses Simulation Opportunity Index (SOI) and Movable Oil in Place (MOIP) maps to identify the locations of infill wells. The projection spans 20 years, from 2023 to 2043. The number of wells needed is determined using creaming curve analysis, which is discussed in the study.