OPTIMIZATION OF PROPPANT VOLUME ALLOCATION IN HYDRAULIC FRACTURING FOR MULTILAYER OIL RESERVOIR BACHELOR THESIS NIKOLAS NICO CALVIN ALEXANDRO 12215036 Submitted as partial fulfillment of the requirements for the degree of BACHELOR OF ENGINEERING in Petroleum Engineering Study Program PETROLEUM ENGINEERING STUDY PROGRAM FACULTY OF MINING AND PETROLEUM ENGINEERING INSTITUT TEKNOLOGI BANDUNG 2019 OPTIMIZATION OF PROPPANT VOLUME ALLOCATION IN HYDRAULIC FRACTURING FOR MULTILAYER OIL RESERVOIR BACHELOR THESIS NIKOLAS NICO CALVIN ALEXANDRO 12215036 Submitted as partial fulfillment of the requirements for the degree of BACHELOR OF ENGINEERING in Petroleum Engineering Study Program Approved by: Thesis Adviser, Wednesday, June 26 th 2019 Ardhi Hakim Lumban Gaol S.T., M.Sc., Ph.D. NIP. 198706302012121001 1 OPTIMIZATION OF PROPPANT VOLUME ALLOCATION IN HYDRAULIC FRACTURING FOR MULTILAYER OIL RESERVOIR Nikolas Nico Calvin Alexandro* and Ardhi Hakim Lumban Gaol S.T., M.Sc., Ph.D** Copyright 2019, Institut Teknologi Bandung Abstract Hydraulic fracturing has been around in the oil and gas industry since 1949, but it is more popular than ever now. Hydraulic fracturing has also been applied for multilayer reservoirs. But has it been done optimally in multilayer reservoir. In this study, the writer intend to optimize the allocation of a provided proppant volume for each layer in multilayer reservoir by finding the maximum value of total productivity index for all the layers. The variables that will be considered in this study are layer thickness and permeability. Each layers will have different permeability and/or thickness, where those layer properties will affect the optimum fracture half-length and width. This study is also validated by using CMG software to compare oil cummulative production for cases where the proppant volume allocation has not been optimized and for the one where it has been. Keywords: hydraulic fracturing, fracturing design, multilayer reservoir, proppant volume, fracture geometry Sari Rekah hidrolik sudah ada di industry minyak dan gas sejak tahun 1949, namun metode in tidak pernah lebih populer dari saat ini. Rekah hidrolik juga telah diaplikasikan pada reservoir dengan banyak lapisan. Namun, apakah metode ini sudah diterapkan secara optimal pada reservoir dengan banyak lapisan. Dalam studi ini, penulis berniat untuk mengoptimasikan alokasi sejumlah volum proppant yang telah ditentukan untuk tiap lapisan reservoir dengan mencari nilai maksimum indeks produktivitas total untuk semua lapisan. Variabel-variabel yang akan dipertimbangkan dalam studi ini adalah ketebalan lapisan dan pemeabilitas. Tiap lapisan akan memiliki permeabilitas dan/atau ketebalan yang berbeda, dimana karakteristik-karakteristik tiap lapisan tersebut akan mempengaruhi panjang dan ketebalan rekahan yang optimum. Studi ini juga dibuktikan dengan penggunaan perangkat lunak CMG untuk membandingkan produksi kumulatif minyak untuk dua kasus dimana optimasi alokasi volume proppant belum dilakukan dengan yang sudah dioptimasi. Kata kunci: rekah hidraulik, desain rekah, reservoir banyak lapisan, volume proppant, geometri rekahan *) Student of Petroleum Engineering Study Program, Institut Teknologi Bandung, 2015 batch **) Thesis Adviser in Petroleum Engineering Study Program, Institut Teknologi Bandung 1. Introduction Hydraulic fracturing is the process of pumping high- pressure fluid into a wellbore at an injection rate that is too high for the formation to accept without breaking. The purpose of hydraulic fracturing is to increase the productivity index of a well by creating cracks in the deep-rock formations through which oil, gas, and brine will flow more freely. When the hydraulic pressure is removed from the well, small grains of hydraulic fracturing proppants hold the fractures open.