Fluida Injeksi Asam berbasis Emulsi dari Kombinasi Asam dengan Surfaktan pada Batuan Pasir

Abstract

Kerusakan formasi menyebabkan penurunan minyak bumi di Indonesia. Emulsi asam menjadi solusi, karena mampu melarutkan mineral penghambat dan mengurangi korosi. Penelitian ini bertujuan mengembangkan fluida injeksi berbasis emulsi dari kombinasi asam (HF–HCl dan HF–HCOOH) dan surfaktan anionik berupa sodium dodesil benzena sulfonat (SDBS) serta non-ionik berupa Sagasurf 50 (SS50) dan Sagasurf 60 (SS60) untuk melarutkan batuan pasir. Larutan HF 3%–HCl 12% menunjukkan solubilitas terbaik sebesar 89,28% dengan laju korosi 105,05 mpy. Emulsi HF–HCl stabil 24 jam dengan SDBS 3–5%, SS50 3–5%, dan SDBS–SS50 (1:1) dalam 2%, memiliki solubilitas terbaik sebesar 56,74% dan laju korosi 90,88 mpy. Emulsi HF–HCOOH stabil 24 jam dengan SS60 2–5%, SS50 3–5%, dan SDBS–SS50 (1:3) dalam 3%, memiliki solubilitas terbaik sebesar 31,11% dan laju korosi sebesar 68,44 mpy. Bentuk emulsi memiliki solubilitas dan laju korosi lebih rendah dibandingkan bentuk larutan. Emulsi HF–HCl khususnya HF 3%–HCl 12% efektif memberikan solubilitas terbaik dibandingkan HF–HCOOH dengan penggunaan surfaktan kombinasi mampu menyokong kestabilan dan kinerja emulsi asam.

Formation damage has reduced Indonesia's oil production. Acid emulsions offer an effective solution by dissolving blocking minerals while minimizing corrosion. This study aims to develop an injection fluid based on acid emulsions (HF–HCl and HF–HCOOH) combined with anionic surfactant sodium dodecyl benzene sulfonate (SDBS) and non-ionic surfactants Sagasurf 50 (SS50) and Sagasurf 60 (SS60) to dissolve sandstone. The 3% HF–12% HCl solution showed the best solubility of 89,28% with a corrosion rate of 105,05 mpy. HF–HCl emulsions stabilized for 24 hours with 3–5% SDBS, 3–5% SS50, and SDBS–SS50 (1:1) at 2%, achieving the highest solubility of 56,74% and a corrosion rate of 90,88 mpy. HF–HCOOH emulsions stabilized for 24 hours with 2–5% SS60, 3–5% SS50, and SDBS–SS50 (1:3) at 3%, reaching a solubility of 31,11% and a corrosion rate of 68,44 mpy. Emulsions exhibited lower solubility and corrosion rates than liquid solutions. The HF–HCl emulsion (3% HF–12% HCl) proved most effective, offering better solubility than HF–HCOOH, while combined surfactants enhanced stability and acid emulsion performance.