The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Salaheldin Elkatatny - One of the best experts on this subject based on the ideXlab platform.
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effect of arenite calcareous argillaceous and ferruginous sandstone cuttings on filter cake and Drilling Fluid properties in horizontal wells
Geofluids, 2019Co-Authors: Badr S. Bageri, Mohamed Mahmoud, Shirish Patil, Mohammed Benaafi, Abdelmjeed Mohamed, Salaheldin ElkatatnyAbstract:Fine, small-size, drilled cuttings, if not properly separated using mud conditioning equipment at the surface, are circulated with the Drilling Fluid from the surface to the bottom hole. These drilled cuttings have a significant effect on the Drilling Fluid properties and filter cake structure. During Drilling long lateral sandstone formations, different cuttings with varied properties will be generated due to sandstone formations being heterogeneous and having different mineralogical compositions. Thus, the impact of these cuttings on the Drilling Fluid and filter cake properties will be different based on their mineralogy. In this paper, the effect of different sandstone formation cuttings, including arenite (quartz rich), calcareous (calcite rich), argillaceous (clay rich), and ferruginous (iron rich) sandstones, on the filter cake and Drilling Fluid properties was investigated. Cuttings of the mentioned sandstone formations were mixed with the Drilling Fluid to address the effect of these minerals on the filter cake thickness, porosity, and permeability. In addition, the effect of different sandstone formation cuttings on Drilling Fluid density and rheology, apparent viscosity (AV), plastic viscosity PV), and yield point (YP) was investigated. High-pressure high-temperature (HPHT) Fluid loss test was conducted to form the filter cake. The core sample’s petrophysical properties were determined using X-ray fluorescence (XRF) and X-ray diffraction (XRD) techniques and scanning electron microscopy (SEM). The results of this work indicated that all cutting types increased the rheological properties when added to the Drilling Fluid at the same loadings but the argillaceous sandstone (clay rich) has a dominant effect compared to the other types because the higher clay content enhanced the rheology. From the filter cake point of view, the ferruginous sandstone improved the filter cake sealing properties and reduced its thickness, while the argillaceous cuttings degraded the filter cake porosity and permeability and allowed the finer cuttings to penetrate deeply in the filter medium.
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Real-Time Prediction of Rheological Parameters of KCl Water-Based Drilling Fluid Using Artificial Neural Networks
Arabian Journal for Science and Engineering, 2017Co-Authors: Salaheldin ElkatatnyAbstract:The main objective of this paper is to use the frequent measurements of mud density, Marsh funnel viscosity, and solid percent to predict the rheological properties (plastic viscosity, apparent viscosity, yield point, flow behavior index, and consistency index of the Drilling Fluid) by developing empirical correlations based on 3000 field data measurements of KCl–polymer mud using artificial neural network. In this paper and for the first time, the solid percent will be included in the prediction of the Drilling Fluid rheological parameters. The common procedure on the well site is to perform a rheological test twice a day and measure mud density, Marsh funnel viscosity, and solid percent frequently every 15–20 min. The artificial neural network (ANN) black box was converted to white box to extract the mathematical model that can predict the rheological parameters. The average absolute error for all correlations was less than 6%, and the correlation coefficient was greater than 90%. Using the developed correlations in predicting the Drilling Fluid properties with high accuracy will eliminate the need for tedious laboratory measurements, and real-time properties can be obtained. This technique will help the Drilling engineers better monitor the Drilling Fluid properties and control the Drilling operations by avoiding the common problems, such as pipe sticking, loss of circulation, and hole cleaning issues.
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single stage filter cake removal of barite weighted water based Drilling Fluid
Journal of Petroleum Science and Engineering, 2017Co-Authors: Badr Salem Ba Geri, Mohamed Mahmoud, Abdulazeez Abdulraheem, Salaheldin Elkatatny, Saleh H Almutairi, Reyad ShawabkehAbstract:Abstract The removal of barite filter cake is a challenging problem because the conventional filter cake removal treatments that use hydrochloric acid (HCl) or chelating agents were ineffective in dissolving barite containing filter cakes. Barite, or barium sulfate, is insoluble in water and acids such as HCl, formic, citric, and acetic acids. Also barite has very low solubility in chelating agents such as Ethylene diamine tetra acetic acid (EDTA) and Diethylene triamine penta acetic acid (DTPA). The present study focuses on developing new formulation to remove the barite filter cake. The removal formulation consists of chelating agents such as Diethylene Triamine Penta acetic Acid (DTPA), converting agent or catalyst, and polymer breaker (Enzyme). Solubility tests of industrial barite and solids collected from de-sanders during well flow back were conducted to develop barite removing solvent. Actual barite Drilling Fluid samples were collected from the field during Drilling a high pressure high temperature deep gas well. The performance of the designed formulation was examined to remove the filter cake formed by real Drilling Fluid samples collected during Drilling operations using High Pressure High Temperature cell (HPHT). Based on the result of this work the filter cake removing formulation dissolved more than 90% of the filter cake formed by real barite Drilling Fluid in a single stage within 24 h. The removal formulation consists of high pH potassium base DTPA of 20 wt% concentration, enzyme as a polymer degrading agent, and one of the following converting/catalytic agents (potassium carbonate, potassium formate, or potassium chloride). The use of converting agents increased the barite solubility from 67–95%.
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Real time prediction of Drilling Fluid rheological properties using Artificial Neural Networks visible mathematical model (white box)
Journal of Petroleum Science and Engineering, 2016Co-Authors: Salaheldin Elkatatny, Zeeshan Tariq, Mohamed MahmoudAbstract:Abstract The Drilling Fluid rheological properties should be monitored frequently during the Drilling operations to prevent the problems related to the change in these properties. Properties such as yield point, plastic viscosity, and apparent viscosity are crucial to evaluate the Drilling Fluid efficiency in cleaning the well. These properties are only measured twice or once a day, but the Marsh funnel viscosity, solid content, and Drilling Fluid density are measured every 10 min. Previous models were introduced only to predict the apparent viscosity of the Drilling Fluid from the Marsh funnel viscosity with large errors. In this paper and for the first time we introduced new model to predict the Drilling Fluid rheological properties from the Marsh funnel viscosity, solid content, and density measurements in real time. We developed a mathematical model that obtained from the weights, biases, and the transfer functions used in the Artificial Neural Networks (ANNs). The ANNs black box was converted to white box to obtain a visible mathematical model that can be used to predict the Drilling Fluid rheological properties only using Marsh funnel viscosity, solid content, and density. Based on 9000 data points (collected from the field measurements for actual Drilling Fluid samples) used in model training and testing, the viscometer readings at 300 and 600 rpm were predicted using the visible mathematical model from the ANNs. The rheological parameters such as yield point, plastic viscosity, apparent viscosity, and consistency index were determined from the viscometer readings at 300 and 600 rpm. The predicted rheological parameters were compared with the measured ones from the field and the match was very good. The average absolute error for the various parameters ranges from 1 to maximum 5 compared to 60 if we used the previously developed correlations. The developed model is a robust technique and tool that can be used to predict the real time Drilling Fluid rheological parameters that are essential for the Drilling hydraulics design and also to predict the performance of Drilling Fluid. Efficient performance of the Drilling Fluids depends on the quality of the Drilling Fluid which needs to be monitored frequently and with the new model this process will be achievable.
Mohamed B Jan - One of the best experts on this subject based on the ideXlab platform.
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review of biodegradable synthetic based Drilling Fluid progression performance and future prospect
Renewable & Sustainable Energy Reviews, 2018Co-Authors: S Z Razali, Robiah Yunus, Suraya Abdul Rashid, Hong Ngee Lim, Mohamed B JanAbstract:Abstract This paper provides a comprehensive review on ester based Drilling Fluid (EBDF). It is no secret that esters with biodegradability and bioaccumulation attributes are among the promising alternatives to synthetic base oil in Drilling Fluids. The findings from the literature explained the critical parameters for Drilling Fluid base which are i) kinematic viscosity, ii) pour point and iii) flash point iv) thermal stability and v) hydrolytic stability and vi) elastomer compatibility. In an ideal case, an EBDF requires base oil with low viscosity, low pour, high flash point, high thermal and hydrolytic stability and compatibility with existing elastomer. However in the real application, these requirements may not be the same as the bottom hole condition which is always subjected to high pressure and high temperature environment. At the moment, the performance of EBDF is considered outstanding for normal borehole depth and complexity. Nevertheless the constraints such as low temperature at the seabed while high temperature and high pressure at the bottom hole may be slightly different when dealing with an EBDF. This is due to its unique molecular structure of ester. Affected parameters include i) high kinematic viscosity, ii) hydrolytic degradation and iii) thermal stability. Failure in managing these parameters may lead to detrimental impacts on the Drilling Fluid performances and the Fluid's stabilities. The application of low viscosity, high thermal and hydrolytic properties of esters and combination with unique carbon based nanomaterials into formulation might be able to close the gap of current EBDF performances.
Lizhi Xiao - One of the best experts on this subject based on the ideXlab platform.
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a novel nmr instrument for real time Drilling Fluid analysis
Microporous and Mesoporous Materials, 2017Co-Authors: Lizhi Xiao, Zhizhan WangAbstract:Abstract We present here a novel instrument for real time Drilling Fluid NMR analysis at well site. The quantitative detection of oil and gas in Drilling Fluid while Drilling helps to characterize reservoir quality and evaluate reservoir productivity. There is a big demand to detect oil content in Drilling Fluid in real time at well site in the petroleum industry. To meet the requirement for continuous and quantitative analysis, the new designed integrate NMR system comprises several subsystems: Drilling Fluid auto-sampling device, small-sized NMR sensor, spectrometer, main controller and wireless data communication. Auto-sampling device takes Drilling Fluids samples continuously and quantitatively from the flow line returning from the well and removes debris with diameter greater than 1 mm to reduce interference in measurement process. The small-sized NMR sensor is implemented based on Halbach magnets with 20 kg weight and about 20 MHz operating frequency. The integrated system is capable of performing remote control and data acquisition at harsh environment. The instrument has been fully tested at a number of wells, and successful discovered oil- and gas-bearing formations.
S Sabbaghi - One of the best experts on this subject based on the ideXlab platform.
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improvement in filtration properties of water based Drilling Fluid by nanocarboxymethyl cellulose polystyrene core shell nanocomposite
Journal of Petroleum Exploration and Production Technology, 2018Co-Authors: Rahmatallah Saboori, S Sabbaghi, Azim Kalantariasl, Dariush MowlaAbstract:Since almost all Drilling problems directly or indirectly relate to Drilling Fluid, improvement in Drilling Fluid significantly enhances Drilling operations. Drilling Fluid contains base Fluid, suspended solid particles and chemicals. Recently, nanoparticles have been widely recommended for improvement in Drilling Fluid properties. The main purpose of this study was to improve the rheological and filtration properties of water-based Drilling Fluid through adding new additive carboxyl methyl cellulose (CMC)/polystyrene core–shell nanocomposite. It compares filtration and rheological behavior of CMC, nanoCMC and core–shell nanocomposite. The core–shell nanocomposite was synthesized by miniemulsion polymerization method, and nanoCMC and core–shell nanocomposite were characterized by scanning electron microscope, transmission electron microscopy, particle size analyzer and thermogravimetric analysis. Fluid loss, mud cake thickness, viscosity, weight and pH of Drilling Fluid with core–shell nanocomposite additive were compared with conventional CMC (bulk CMC) and nanoCMC particles. Results showed a significant decrease in mud cake thickness and Fluid loss when the core–shell nanocomposite was used, as compared with conventional CMC and nanoCMC. Viscosity of three additives has same trend with insignificant change while less yield point is obtained for Drilling Fluid containing core–shell nanocomposites. Mud weight and pH were almost the same for all three additives. Thus, the core–shell nanocomposite can be an alternative additive to control mud cake thickness and Fluid loss while maintaining other main properties in an acceptable range.
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the effect of the tio2 polyacrylamide nanocomposite on water based Drilling Fluid properties
Powder Technology, 2015Co-Authors: Mehran Sadeghalvaad, S SabbaghiAbstract:Drilling Fluids tend to be used for the Drilling of deep wells to clean and transport the rock cuttings, maintain the hole integrity, lubricate and cool the drill bit, and control the formation pressures. The present work aims at improving the water-based Drilling Fluid properties by using the TiO2/polyacrylamide (PAM) nanocomposite additive. This additive was obtained through the polymerization of acrylamide monomer in the presence of TiO2 nanoparticles using the solution polymerization method. The TiO2/PAM nanocomposite was characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Ultraviolet–visible (UV–Vis) spectroscopy, scanning electron microscopy (SEM), and dynamic light scattering (DLS). The rheological and filtration properties of the nano-enhanced water-based Drilling Fluid (NWBF) were investigated using the rotational viscometer and low temperature and pressure filter press apparatus. The results indicated that the additive contributes to an increase in the viscosity and a decrease in the Fluid loss and filter cake thickness.
Zhizhan Wang - One of the best experts on this subject based on the ideXlab platform.
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a novel nmr instrument for real time Drilling Fluid analysis
Microporous and Mesoporous Materials, 2017Co-Authors: Lizhi Xiao, Zhizhan WangAbstract:Abstract We present here a novel instrument for real time Drilling Fluid NMR analysis at well site. The quantitative detection of oil and gas in Drilling Fluid while Drilling helps to characterize reservoir quality and evaluate reservoir productivity. There is a big demand to detect oil content in Drilling Fluid in real time at well site in the petroleum industry. To meet the requirement for continuous and quantitative analysis, the new designed integrate NMR system comprises several subsystems: Drilling Fluid auto-sampling device, small-sized NMR sensor, spectrometer, main controller and wireless data communication. Auto-sampling device takes Drilling Fluids samples continuously and quantitatively from the flow line returning from the well and removes debris with diameter greater than 1 mm to reduce interference in measurement process. The small-sized NMR sensor is implemented based on Halbach magnets with 20 kg weight and about 20 MHz operating frequency. The integrated system is capable of performing remote control and data acquisition at harsh environment. The instrument has been fully tested at a number of wells, and successful discovered oil- and gas-bearing formations.
