EVALUATION OF THE EFFECTIVENESS OF THE CHELATING AGENTS (EDTA AND CITRIC ACID) IN ENHANCING CRUDE OIL RECOVERY Raka Fajar Nugroho, Rini Setiati, Suryo Prakoso
Department of Petroleum Engineering, Universitas Trisakti, West Jakarta 11440, Indonesia
Corresponding email: rinisetiati[at]trisakti.ac.id
Abstract
This research aims to evaluate and compare the effectiveness of two types of chelating agents, namely EDTA and citric acid, in enhancing the recovery of intermediate crude oil. These compounds were selected due to their potential to alter the wettability properties of reservoir rocks, increase rock porosity and permeability, and enhance oil solubility, all of which are critical factors in enhanced oil recovery (EOR). The research methodology involves testing the chemical characteristics of EDTA and citric acid as stable EOR chemicals. Solutions of EDTA and citric acid with various concentrations (5-10% by weight) and pH levels (4 and 10) are prepared for use in core flooding injection tests on Berea sandstone and crude oil samples in the Trisakti EOR Laboratory. The results of this research are expected to provide a deeper understanding of the capabilities of EDTA and citric acid in enhancing the recovery of intermediate crude oil. Additionally, the study will reveal the influence of concentration and pH on the recovery factor, which can be valuable information for the development of more effective and efficient EOR technologies. This research holds significant potential benefits for the oil and gas industry, particularly in efforts to increase oil production from reservoirs with declining yields. With a better understanding of chelating agents such as EDTA and citric acid, the development of targeted EOR strategies can help optimize crude oil production in oilfields.
Keywords: Chelating agents, EDTA, Citric acid, Chemical EOR, Recovery factor
Topic: Engineering of Drilling, Production, and production surface and facility
