Marcus Ferreira - Academia.edu (original) (raw)

Papers by Marcus Ferreira

Day 2 Thu, May 26, 2022

Inorganic scaling is a phenomenon of common occurrence both in nature and in industrial operation... more Inorganic scaling is a phenomenon of common occurrence both in nature and in industrial operations. In general, its effect can be highly detrimental for the oil industry, as fouling can take place in different stages of the production, from the well bore and downhole production control valves to upstream primary oil processing and separation equipment. The deposition of precipitated crystals on pipe walls and valves can result in severe production decline. Despite the high costs involved in the design and operation of separate lines for additive injection, chemical inhibition is typically the solution adopted by the oil companies to mitigate scaling. The purpose of the present work is to show results of a large scale laboratory pipe flow experiments to evaluate the performance of non-chemical solutions to mitigate and control calcium carbonate scaling. Magnetic, electromagnetic and ultrasound devices have been tested in a set up that simulates the mixing of two incompatible brine so...

SPE Deepwater Drilling and Completions Conference, 2016

The thermal behavior of a deepwater well was simulated by use of an existing mathematical model i... more The thermal behavior of a deepwater well was simulated by use of an existing mathematical model in which a rigorous flow-pattern-based multiphase-flow formulation is used to predict the pressure drop of the hydrocarbon stream. The heat-transfer model relied on the energy equation applied to the hydrocarbon mixture and on a radial thermal-resistance network between the wellbore and the formation. Different annulus-convection and thermal-formation models were evaluated. Production pressure and temperature results were compared with field data and with a commercial software package, showing good agreement with both. The model was able to capture important quantitative phenomena associated with the wellbore-heat transmission (e.g., lithologic column and annulus-fluid type). More specifically, the simulations showed that, for short production times, the heat transfer to the formation was significantly influenced by the wellbore-thermal resistances-namely, the cement sheaths and the nitrogen present in the production annulus. As the production time increased, the formation became the dominant thermal resistance.

Wellhead temperature increase in offshore wells has become a serious problem in harsh scenarios (... more Wellhead temperature increase in offshore wells has become a serious problem in harsh scenarios (e.g., high-pressure, high-temperature reservoirs) where there is great potential for high hydrocarbon flow rate production. As the high-temperature reservoir fluid flows through the tubing string towards the wellhead, the entire borehole is heated. As a result of the radial temperature gradients, the fluid pressure within the sealed annular space between tubes increases, leading to a well integrity failure scenario known as annular pressure build up (APB). This paper addresses the hydraulic and thermal behavior of a typical pre-salt oil production well aiming to better characterize the occurrence of APB for typical operational conditions. For that, one-dimensional forms of the momentum and energy equations are solved simultaneously to determine the local pressure and enthalpy of the multiphase mixture along the well. The thermodynamic and transport properties of the 24-component mixture considered were calculated using Multiflash 4.2, which was solved together with the momentum and energy equations to determine the local vapor mass fraction and the equilibrium temperature. Additionally, a thermal resistance network was used to model the heat transfer in the radial direction in the concentric multi-layered well geometry. Boundary conditions were defined based on the geothermal gradient and the hydrocarbon flow rate at the bottom hole. A sensitivity analysis was conducted to evaluate the effect of annular fluid (i.e., water based or oil based fluid) and gas/oil ratio (GOR) on the annular fluid temperature and pressure profile. Results show that the annular pressure is strongly affected by the annular fluid used, which also played an important role in the overall thermal resistance. Similarly, the GOR also highly influenced the fluid flow pressure drop in the tubing.

A recurring problem that affects mainly high pressure and high flow rate wells during oil explora... more A recurring problem that affects mainly high pressure and high flow rate wells during oil exploration and production in ultra-deepwater scenarios is the phenomenon called APB (Annular Pressure Buildup), which can be understood as the heating process of the borehole caused by the upward flow of heated hydrocarbons towards the wellhead. This heating process affects the annular space of the borehole, which is often sealed and completely filled with drilling fluid, causing its expansion. The expansion of the fluid increases the annulus pressure to levels that can be detrimental to the well integrity. In order to avoid the tube collapse several strategies are commonly used to mitigate the APB, such as the Vacuum Insulated Tubing (VIT). The VIT has been extensively used in steam injector landshore wells in Northeast and Southeast Brazil, even though its application in production offshore wells is still limited. The technique consists in the use of two concentric metallic tubes that are welded at their extremities, forming an annular space, which between then is evacuated, minimizing the radial heat transfer. However, since the junction between every two tubes is not insulated, heat transfer might be significant at this location. Therefore, in this paper, we study numerically the heat transfer behavior of the VIT system using a commercial code aiming to evaluate the relative influence of the junction when compared with the insulated main body of the VIT. In addition, a study was conducted using a 1-D analytical model to estimate the overall heat transfer coefficient and the effective thermal conductivity of the VIT system as an integral unit based on a one-dimensional model. Computational results show that a 2D heat transfer model can capture important phenomena present in the VIT behavior.

IADC/SPE Drilling Conference and Exhibition, 2010

Cuttings return analysis is an important tool to detect and prevent problems during the petroleum... more Cuttings return analysis is an important tool to detect and prevent problems during the petroleum well drilling process. Several measurements and tools have been developed for drilling problems detection, including mud logging, PWD and downhole torque information. Cuttings flow meters were developed in the past to provide information regarding cuttings return at the shale shakers. Their use, however, significantly impact the operation including rig space issues, interferences in geological analysis besides, additional personel required. This article proposes a non intrusive system to analyze the cuttings concentration at the shale shakers, which can indicate problems during drilling process, such as landslide, the collapse of the well borehole walls. Cuttings images are acquired by a high definition camera installed above the shakers and sent to a computer coupled with a data analysis system which aims the quantification and closure of a cuttings material balance in the well surface...

Proceedings 2009 International Conference on Adaptive and Intelligent Systems, Icais 2009, 2009

... Aparecido N. Marana, Giovani Chiachia, Ivan R. Guilherme, Joao P. Papa High Performance Comp... more ... Aparecido N. Marana, Giovani Chiachia, Ivan R. Guilherme, Joao P. Papa High Performance Computing Laboratory - Department of Computing Sao Paulo State University - UNESP Bauru, Brazil nilceu@fc.unesp.br ... [2] PE Hart nad DG Stork RO Duda, Pattern Classification ...

Journal of Instrumentation, 2009

In the framework of the Clear-PEM project for the construction of a high-resolution and high-spec... more In the framework of the Clear-PEM project for the construction of a high-resolution and high-specificity scanner for breast cancer imaging, a Positron Emission Mammography tomograph has been developed and installed at the Instituto Português de Oncologia do Porto hospital. The Clear-PEM scanner is mainly composed by two planar detector heads attached to a robotic arm, trigger/data acquisition electronics system and computing servers. The detector heads hold crystal matrices built from 2 × 2 × 20 mm 3 LYSO:Ce crystals readout by Hamamatsu S8550 APD arrays. The APDs are optically coupled to both ends of the 6144 crystals in order to extract the DOI information for each detected event. Each one of 12288 APD's pixels is read and controlled by Application Specific Integrated Circuits water-cooled by an external cooling unit. The Clear-PEM frontend boards innovative design results in a unprecedented integration of the crystal matrices, APDs and ASICs, making Clear-PEM the PET scanner with the highest number of APD pixels ever integrated so far. In this paper, the scanner's main technical characteristics, calibration strategies and the first spectrometric performance evaluation in a clinical environment are presented. The first commissioning results show 99.7% active channels, which, after calibration, have inter-pixel and absolute gain distributions with dispersions of, respectively, 12.2% and 15.3%, demonstrating that despite the large number of channels, the system is uniform. The mean energy resolution at 511 keV is of 15.9%, with a 8.8% dispersion, and the mean C −1 DOI is 5.9%/mm, with a 7.8% dispersion. The coincidence time resolution, at 511 keV, for a energy window between 400 and 600 keV, is 5.2 ns FWHM.

All Days, 2009

Sand production in unconsolidated formations has brought heavy injury for the oil and gas industr... more Sand production in unconsolidated formations has brought heavy injury for the oil and gas industry around the world. Million dollars have been invested in sand control techniques. Among the several sand control systems existing, Open Hole Gravel Pack (OHGP) is the one adopted for horizontal well completions in the offshore Brazilian fields. With the experience in the development of such fields, some assets start to consider the adoption of less conservative sand control strategies, such as the use of stand alone premium screens (SAS). The present work proposes a methodology for evaluating the impact of the sand control technique in the productivity or injectivity of a horizontal well. Several parameters, such as damage rate (DR) and productivity or injectivity index per horizontal effective length (PI/Lef) were used to compare similar wells equipped with different sand control techniques. The main goal of the study is to address the following questions: There is any formation damage...

Engineering Applications of Artificial Intelligence, 2011

Petroleum well drilling monitoring has become an important tool for detecting and preventing prob... more Petroleum well drilling monitoring has become an important tool for detecting and preventing problems during the well drilling process. In this paper, we propose to assist the drilling process by analyzing the cutting images at the vibrating shake shaker, in which ...

The present work is concerned with the prediction of annular pressure buildup (APB) in an offshor... more The present work is concerned with the prediction of annular pressure buildup (APB) in an offshore well. APB is caused by the heating and expansion of the annular fluid trapped between the production line and the surrounding formation due to the production of heated hydrocarbons. To better predict this effect a mathematical model was developed to simulate the hydrodynamic and thermal processes along the production well, as well as the thermal and mechanical interaction with the surrounding formation. The model was developed to be as robust as possible so it can be used in different scenarios. The thermal model relied on the energy equation for the hydrocarbon mixture and on a thermal resistance network in the radial direction. The momentum and energy equations were solved coupled to determine the vapor mass fraction and the equilibrium temperature of the mixture along the well. An estimate of the annular pressure buildup was obtained by coupling the expansion of the trapped fluid wi...

Journal of Next Generation Information Technology, 2010

Automatic inspection of petroleum well drilling has became paramount in the last years, mainly be... more Automatic inspection of petroleum well drilling has became paramount in the last years, mainly because of the crucial importance of saving time and operations during the drilling process in order to avoid some problems, such as the collapse of the well borehole walls. In this paper, we extended another work by proposing a fast petroleum well drilling monitoring through a modified version of the Optimum-Path Forest classifier. Given that the cutting's volume at the vibrating shale shaker can provide several information about drilling, we used computer vision techniques to extract texture informations from cutting images acquired by a digital camera. A collection of supervised classifiers were applied in order to allow comparisons about their accuracy and effciency. We used the Optimum-Path Forest (OPF), EOPF (Efficient OPF), Artificial Neural Network using Multilayer Perceptrons (ANN-MLP) Support Vector Machines (SVM), and a Bayesian Classifier (BC) to assess the robustness of our proposed schema for petroleum well drilling monitoring through cutting image analysis.