STUDI SIMULASI UNTUK PREDIKSI PRODUKSI GAS DI LAPANGAN X MELALUI SENSITIVITAS LAJU ALIR DAN TUBING HEAD PRESSURE

Ghanima Yasmaniar, Maman Djumantara, S. Prakoso
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Abstract

ABSTRAK Lapangan X merupakan lapangan baru dan hanya memiliki satu existing well yaitu sumur X-1. Sumur ini belum berproduksi sehingga tidak ada data produksi dari Lapangan X. Walaupun demikian, pada sumur X-1 ini telah dilakukan DST (Drill Stem Test), dimana terdapat indikasi kandungan gas dari hasil tes tersebut.Penelitian ini dilakukan dengan menggunakan Black Oil Simulator dengan fluida yang terdiri dari gas dan air. Adapun model dari reservoir ini berdimensi 32×280×94 sehingga totalnya ada sebanyak 842.240 grid cell. Berdasarkan perhitungan volumetrik, diketahui bahwa GIIP (Gas Initial in Place) dari Lapangan X adalah sebesar 20,02 BSCF. Sedangkan dari hasil inisialisasi data pada proses simulasi, didapat GIIP sebesar 20,8 BSCF. Perbedaan yang didapat dari kedua hasil perhitungan di atas adalah sebesar 3,896%. Mengingat lapangan ini belum berproduksi, maka proses history matching dilakukan dengan menggunakan data DST dari sumur X-1.Skenario produksi pada penelitian ini dilakukan selama 15 tahun melalui analisis sensitivitas pergantian nilai laju alir gas dan THP (Tubing Head Pressure), sehingga totalnya ada 12 skenario produksi. Berdasarkan hasil simulasi dengan memperhatikan plateau time, maka skenario produksi terbaik didapat pada pengaturan laju alir 2 MMSCF dengan RF (Recovery Factor)  sebesar 54,7% dan plateau rate bertahan sampai akhir simulasi. Apabila hanya memperhatikan sampai sumur mati, maka skenario terbaik didapat pada pengaturan laju alir 8 MMSCF dan THP 100 psia, yaitu diperoleh RF sebesar 79,56%.  Kata Kunci : Simulasi reservoir, laju alir, tubing head pressure, plateau time, recovery factor  ABSTRACT Field X is a new field and it consists of X-1 well as an exsisting well. This well has not been produced, so there is no production data from Field X. However, in this well has been carried out a DST (Drill Stem Test), which indicates the gas content of the test results. This research used Black Oil Simulator which the fluid consist of gas and water. The model of this reservoir has dimensions of 32 × 280 × 94, so there are a total of 842,240 grid cells. Based on volumetric calculations, it has known that the GIIP (Gas Initial in Place) from Field X is 20.02 BSCF. Meanwhile, from the results of initialization data is 20.8 BSCF, therefore the the difference obtained from the calculation is 3,896%. Considering that this field has not been produced, the history matching process was carried out using DST data from X-1 well. The production scenario in this study was carried out for 15 years through a sensitivity analysis of changes in the value of gas flow rate and THP (Tubing Head Pressure), so that there are a total of 12 production scenarios. Based on the simulation results regarding the plateau time, the best production scenario is obtained at a flow rate setting of 2 MMSCF with an RF (Recovery Factor) of 54.7% and the plateau rate lasts until the end of the simulation. If we just consider the production until the well is dead, the best scenario is obtained at the flow rate setting of 8 MMSCF and THP 100 psia, which is an RF of 79.56%. Keywords :Reservoir simulation, flow rate, tubing head pressure, plateau time, recovery factor
模拟研究,通过流线型灵敏度和气压计,预测X场气体生产
抽象场X是一个新的领域,只有一个existing井X-1。然而,X-1井是DST (Drill Stem Test),因此井中没有任何气体含量的迹象。这项研究是通过使用由气体和水组成的流体模拟器进行的。至于这94次点32×280×水库的模型,所以总共有多达842240网格细胞。根据体积计算,X场的初始气体为2002 BSCF。在模拟过程中,数据的初始化结果为208 BSCF。以上两种计算结果的差额是3,896%。由于此字段还没有生成,所以匹配历史进程是使用X-1井的DST数据完成的。这项研究的生产场景是在15年的时间里,通过分析气体流速值和THP(顶压)的波动,总共有12种生产方案。根据高原时间的模拟结果,最好的生产场景可以在alir 2 MMSCF高速设置为54.7%,高原利率可以持续到模拟结束。如果你只观察到井已经死了,最好的情况是设置alir 8 MMSCF和THP 100 psia,即得到射频为79.56%。关键字:水库模拟,流速,凝头压力,高原时间,恢复因子ABSTRACT场X是一个新的场,它认为X-1场是好的。这一井并没有被生产出来,所以在这个井里没有从输氧场提取数据,这一井里有潜在的气体替代品。这项研究利用了天然气和水所考虑的黑色石油模拟器。这个水库有维度的模型》32×280×94,所以这是一个完全的842.240网格细胞。根据体积计算,X场的初始气体是20.02 BSCF。我的意思是,从初始化数据的结果来看是20.8 BSCF,这与从计算中不同的差异是396%相一致。考虑到这片土地没有生产,历史上相互处理的处理过程正在用X-1的数据进行处理。这项研究的生产情况在气体流速和THP值中的变化分析中被关注了15年,所以总共有12种生产情况。基于高原时代的模拟,最好的生产方案是为54.7%的2个MMSCF准点设置和高原利率,直到模拟结束。如果我们考虑到生产直到死亡,最好的情况是在8分钟的MMSCF和THP 100 psia设置中,这是79.56%的射频。关键词:水库模拟,浮动利率,顶压,高原时间,恢复因子
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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