Long-Term Investigation of Nano-Silica Gel for Water Shut-Off in Fractured Reservoirs.

Silicate gels have long been utilized as water shut-off agents in petroleum fields to address excessive water production. In recent years, nano-silica gel has emerged as a promising alternative to traditional silicate gels, offering potentially improved plugging performance. However, the long-term effectiveness of these gels remains uncertain, posing challenges to sustained profitability.

Overview of Leak-Off Test and Formation Integrity Test: Test Interpretation and Pitfalls.

Formation strength tests, such as formation integrity test (FIT), leak-off test (LOT), and extended leak-off test (XLOT), are crucial for maintaining wellbore stability. Wellbore stability issues are the main reason for nonproductive time (NPT) especially in the drilling operation. Therefore, it is important to understand the stresses around the wellbore to better interpret the formation strength tests.

A Review of Recent Developments in Nanomaterial Agents for Water Shutoff in Hydrocarbon Wells.

Reducing water production from hydrocarbon wells is one of the major requirements to prolong the life span of production wells. Gel treatment is commonly regarded as one of the traditional cost-effective methods for water shut-off applications. Different gel systems have been developed to overcome the challenges of performing a successful water shut-off treatment.

The Effect of Olive Waste on the Rheological Properties, Thickening Time, Permeability, and Strength of Oil Well Cement.

In the oil and gas industry, cementing is a very important process to maintain the stability of the well. The cement can provide an effective plug against fluid movement and at the same time supports the casing and formations. Based on the operation conditions, different types of additives are used to make the cement slurry, and incorporation of a new additive considerably affects all properties of the cement slurry and the solidified sheath.

Review of Kerogen's Geomechanical Properties: Experiments and Molecular Simulation.

Measuring the mechanical properties of kerogen, the predominant constituent of organic matter in shale is exceedingly difficult as it constitutes small-scale aggregates interspersed in rocks. Kerogen is characterized by significantly lower stiffness compared to inorganic minerals, thereby the kerogen regions are potential areas for study during, for example, drilling or macroscopic fracture propagation in the course of hydraulic fracturing. For instance, the elastic modulus of kerogen-rich spots is around 10 GPa, while it is about 70 GPa for quartz.

Molecular characterization of extended-spectrum ß-lactamase producers, carbapenemase producers, polymyxin-resistant, and fosfomycin-resistant Enterobacterales among pigs from Egypt.

Objectives: To perform the first prospective surveillance evaluating the occurrence of genes encoding colistin resistance, fosfomycin resistance, carbapenemase, or extended-spectrum ß-lactamases (ESBLs) among Enterobacterial isolates recovered from the gut flora of pigs from Egypt.

Methods: Between February and April 2020, 81 rectal swabs were collected from pigs in a slaughterhouse, Cairo, Egypt. Samples were screened for different resistance mechanisms using SuperPolymyxin, ChromID ESBL, SuperFOS, and SuperCarba selective agar plates.

Development and Implementation of the AIDA International Registry for Patients With Still's Disease.

Objective: Aim of this paper is to present the design, construction, and modalities of dissemination of the AutoInflammatory Disease Alliance (AIDA) International Registry for patients with systemic juvenile idiopathic arthritis (sJIA) and adult-onset Still's disease (AOSD), which are the pediatric and adult forms of the same autoinflammatory disorder.

Methods: This Registry is a clinical, physician-driven, population- and electronic-based instrument implemented for the retrospective and prospective collection of real-world data. The collection of data is based on the Research Electronic Data Capture (REDCap) tool and is intended to obtain evidence drawn from routine patients' management.

The Use of Graphite to Improve the Stability of Saudi Class G Oil-Well Cement against the Carbonation Process.

Oil-well cement physical characteristics considerably change after being carbonated by a CO-rich solution. In this study, the influence of graphite particles in the characteristics of oil-well cement reacted with a CO-rich solution at 130 °C and 10 MPa for 10 days was studied. After 10 days of carbonation, incorporating 0.

Prediction of Water Saturation in Tight Gas Sandstone Formation Using Artificial Intelligence.

Water saturation ( ) is a vital factor for the original oil and gas in place (OOIP and OGIP). Numerous available equations can be used to calculate , but their values have been unreliable and strongly depend on core analyses, which are costly and time-consuming. Hence, this study implements artificial intelligence (AI) modules to predict from the conventional well logs.

Numerical Modeling of Gas Migration through Cement Sheath and Microannulus.

Cement sheath is considered an important barrier throughout the life cycle of the well. The integrity of the cement sheath plays a vital role in maintaining the integrity of wells. Cement's ability to seal the annular space or a wellbore, also known as cement sealability, is an important characteristic of the cement to maintain the well integrity.

Speed of recovery in adult patients with community-acquired pneumonia; moxifloxacin versus levofloxacin.

Introduction: To evaluate the speed of recovery in CAP-treated adults with Moxifloxacin versus levofloxacin.

Methodology: A retrospective multicenter study between January 14, 2010 - March 23, 2017. Patients' records with the diagnosis of community-acquired pneumonia (CAP), age ≥ 18 and ≤ 60 years old, susceptible bacteria to the prescribed fluoroquinolone, completed three days of antimicrobial therapy and who were switched from parenteral to the oral form for the same antimicrobial agent were included.