Optimisasi Kondisi Operasi dan Kontrol pada Drilling Untuk Mengatasi Perubahan Massa Jenis Batuan Menggunakan Metode Kontrol PID

Rahmatullah, Muhammad Ghofur (2020) Optimisasi Kondisi Operasi dan Kontrol pada Drilling Untuk Mengatasi Perubahan Massa Jenis Batuan Menggunakan Metode Kontrol PID. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proses utama yang dilakukan dalam pengambilan minyak adalah pembuatan sumur (wellbore). Pembuatan wellbore membutuhkan sub-sub komponen pendukung seperti man power, machine, material, methods, environment, dan time. Proses selanjutnya adalah drilling (pengeboran), pada tahap ini mulai diterapkannya otomatisasi dikarenakan beberapa faktor, salah satunya adalah batuan. Proses pengeboran sumur harus melewati berbagai jenis batuan yang ada di bumi. Batuan terdiri dari mineral atau bahan organik yang berada di lapisan bawah permukaan atau strata yang tersebar di dunia. Pada saat pengeboran batuan yang akan ditemui digolongkan dalam 3 jenis dasar batuan, batuan igneous, sedimen dan metamorf. Perlu adanya pemodelan kondisi operasi drilling untuk mengatasi perubahan massa jenis batuan diawali dengan tahap penentuan nilai ROP (rate of penetration) terhadap munculnya disturbance, oleh karena itu dilakukanlah optimasi terhadap munculnya perubahan massa jenis batuan. Didapatkan hasil optimisasi ROP pada perubahan massa jenis batuan clay, sandstone, limestone dan granit masing masing 7.8111 bar, 6.5731 bar, 5.329 bar, dan 4.9006 bar. Hasil ROP akan menentukan fraksi serpihan pada bottom hole, serpihan akan ikut terangkut bersama mud dalam proses pembersihan bottom hole, penambahan serpihan pada mud akan menaikkan nilai dari massa jenis mud. Nilai massa jenis mud awal adalah 1400 kg/m3 sedangkan nilai massa jenis mud campuran akibat serpihan batuan clay, sandstone, limestone dan granite masing masing memiliki nilai 1401.97186643153 kg/m3, 1401.95399033976 kg/m3, 1401.92783583179 kg/m3, serta 1401.91588506096 kg/m3. Oleh karena itu perlu dilakukan pengontrolan terhadap pressure pada bit atau pressure pada bottom hole akibat pengaruh perubahan massa jenis batuan. Pada penelitian kali ini dilakukan pengendalian pressure pada bottom hole dengan pressure pada choke valve (pc), besar bukaan pada choke valve (zc) serta flowrate backpump (qbck) sebagai manipulated variable. ================================================================================================================== The main process carried out in oil extraction is the making of a well (wellbore). Wellbore manufacturing requires supporting sub-components such as man power, machine, material, methods, environment, and time. The next process is drilling (drilling), at this stage the implementation of automation starts due to several factors, one of which is rock. The process of drilling wells must pass through various types of rocks that exist on earth. Rock consists of minerals or organic materials that are in the subsurface layer or strata that are spread in the world. At the time of rock drilling that will be found classified into 3 basic types of rocks, igneous, sedimentary and metamorphic rocks. It is necessary to model drilling operation conditions to overcome changes in rock density beginning with the stage of determining the value of ROP (rate of penetration) on the emergence of disturbance, therefore an optimization of the emergence of changes in rock density occurs. The results from the optimization of the ROP on the change in the density of clay, sandstone, limestone and granite are 7,8111 bar, 6,5731 bar, 5,329 bar and 4,9006 bar respectively. The results of the ROP will determine the fraction of debris on the bottom hole, the debris will be transported along with the mud in the bottom hole cleaning process, the addition of splinter to the mud will increase the value of the mud density. The initial mud density value is 1400 kg/m3 while the value of mixed mud density due to clay, sandstone, limestone and granite rock fragments each has a value of 1401.97186643153 kg/m3, 1401.95399033976 kg/m3, 1401.92783583179 kg/m3, and 1401.91588506096 kg/m3, 1401.95399033976 kg/m3, 1401.92783583179 kg/m3, and 1401.91588506096 kg/m3, 1401.95399033976 kg/m3, 1401.92783583179 kg/m3, and 1401.91588506096 kg/m3, 1401.95399033976 kg/m3, 1401.92783583179 kg/m3, and 1401.91588506096 kg/m3, 1401.95399033976 kg/m3, 1401.92783583179 kg/m3. Therefore it is necessary to control the pressure on the bit or pressure on the bottom hole due to the influence of changes in rock density. In this study the pressure control of the bottom hole was carried out with pressure on the choke valve (pc), the size of the opening in the choke valve (zc) and the flowrate backpump (qbck) as a manipulated variable.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: drilling, pressure bottom hole, massa jenis batuan, disturbance, rock density
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ223 PID controllers
T Technology > TN Mining engineering. Metallurgy > TN871.3 Offshore well drilling
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User: Muhammad Ghofur Rahmatullah
Date Deposited: 13 Aug 2020 00:12
Last Modified: 13 Aug 2020 00:12
URI: https://repository.its.ac.id/id/eprint/77752

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