A novel alkali-surfactant for optimization of filtercake removal in oil–gas well

Abstract

The main objective of this study is to improve the oil-based filtercake removal at the wellbore second interface through chemical method. The reductions in near-well permeability, bonding strength at wellbore second interface and acidizing treatment are the critical problems in oilfield upstream operations. One of the major causes has been identified as drilling fluid filtrate invasion during the drilling operations. This as result leads to near-well reduction in-flow capacity due to high drawdown pressure and wellbore instability. A number of chemical methods such as enzymes, acids, oxidizers, or their hybrids, have been used, however, due to the presence of a number of factors prior to its removal, there are still many challenges in cleaning oil-based filtercake from the wellbore surface. There is a need for development an effective method for improving oil-based filtercake removal. This study presents a novel Alkali-Surfactant (KV-MA) solution developed in the laboratory to optimize the filtercake removal of oil–gas wellbore. The Reynold number for KV-MA solution was found to be 9,068 indicating that turbulent flow regime will dominate in the annulus which enhances the cleaning efficiency. The wettability test established that, contact angle of 14° was a proper wetting agent. The calculated cleaning efficiency was 86.9%, indicating that it can effectively remove the oil-based filtercake. NaOH reacts with the polar components in the oil phase of the oil-based filtercake to produce ionized surface-active species; hence reducing the Interfacial Tension. Surfactant quickens the diffusion of ionized species from the interface to the bulk phase.

Effect of New Design of the Laser Installation and Spraying Method on the Physical and Mechanical Properties the Inner Surface a Small Diameter Coated with 15Cr17Ni12V3F35ZrO2

“…The variety of wear is caused by the action of an aggressive environment, the complex composition of oil (Table 1), and the influence of inhibitors (SNPH-7909, SNPH-7941, SNPH-7963, FLEC IP-106, and RT-1M) on metal products at the atomic level. The study of the types of RDP failures is required to establish a causal relationship between the failures, the types of defects, and the composition of the oil [11][12][13][14][15][16][17][18]. To identify the factors affecting the operation of the RDP, basic studies of the compositions of 8 oils, 1 asphalt-resin-paraffin deposit (ARPD), and 11 reservoir waters were carried out.…”

Production of biosurfactant by Bacillus subtilis UCP 0999 using cassava wastewater (CWW) and waste frying oil (WFO) as renewable substrates

“…From the structural point of view, they exhibit both a hydrophobic tail with one or several hydrocarbon chains (saturated or unsaturated fatty acids), and a hydrophilic head with one or several polar groups (such as carbohydrates, peptides and amino acids) (Alwadani & Fatehi, 2018;Samsu, et al, 2021). Furthermore, they are classified in three main groups: nonionic, anionic and cationic surfactants (Cheng, et al, 2020;Lichinga, et al, 2022).…”