Pedro Correia

• Master in Geology and Mining Engineering
• Consultant at Eyeware

Soil contamination assessments can be improved with new methods aimed at the accurate estimation of the volume and extension of contaminated soil to be remediated. Geostatistical models that use secondary information to characterize soil contamination are incorporated into a new integration model to provide accurate three-dimensional maps. The prop...

For characterization of reserves of mineral deposits, the spatial dispersion of grades is characterized with stochastic models (geostatistical estimation or simulation) in order to quantify the associated uncertainty. However, and given the complex nature of these geobodies, usually deterministic models are used to determine their geometry, definin...

Abnormal pore pressures can result in drilling problems such as borehole instability, stuck pipe, circulation loss, kicks, and blowouts. Gradient pore pressure prediction is of great importance for risk evaluation and for planning new wells in early stages of development and production of oil reservoirs. In this paper, a stochastic simulation with...

Volumetrics calculation is the key operation after performing time to depth conversion. It provides a measurement of the volume of reserves that can be expected in a reservoir. This process involves various sources of uncertainty due to the limited quantity of hard data, the noisy seismic (particularly around faults), struggling to obtain the most...

To optimize hydrocarbons recovery and quantify future production risks, it is necessary to accurately characterize traps geometry. This geometry is estimated from both seismic and well data, using Time-Depth conversion methods. This characterization is a critical issue in reservoirs with thin beds, as the uncertainty on horizons depth can lead to l...

Volumetrics calculation is the key operation after performing time to depth conversion. It provides a measurement of the volume of reserves that can be expected in a reservoir. This process involves various sources of uncertainty due to the limited quantity of hard data, the noisy seismic (particularly around faults), struggling to obtain the most...

To optimize hydrocarbons recovery and quantify future production risks, it is necessary to accurately characterize traps geometry. This geometry is estimated from both seismic and well data, using Time-Depth conversion methods. This characterization is a critical issue in reservoirs with thin beds, as the uncertainty on horizons depth can lead to l...

Making games for the purpose of education is nowadays a more and more common option for both tutors and game developers. The advantages are great. A well designed game can achieve a far greater level of voluntary focus than the classical teaching methods. The challenge here is to comprehend what stimulates a child to play a game and how can you mak...

This is a 7zip file (7zip is free and open-source) you can extract. Once you do you'll have DSS-LA with a parameter file and data ready to run. If you want to test immediately just run the executable. Otherwise you may want to edit sdsim.par with your own parameter. Read the README_FIRST.txt file for instructions. There are also two folders with th...

In seismic reservoir characterization one aims to derive petrophysical properties of hydrocarbon reservoir conditioned to both available well-log and seismic reflection data. In this paper we present a new global pre-stack seismic AVO inversion methodology that inverts pre-stack seismic data directly for density, p-wave velocity, s-wave velocity an...

This is a start of the research semester I've presented to show some of the most recent research I've made and some proposals for new ideas and new features for GEOMS2 software. The ideas are at end of the document. This first part is presenting the first stage of a novel procedure to study oil reservoir case-studies with very little "hard" data.

Where All Leaves Fall (yet a temporary name) is visual novel project with some game-alike interactivity. This project is being developed by "anteia" with active contributors: Pedro Correia, João Correia and Marco Balsinha. This is an initial sketch presentation where we've debated possible technologies, illustration and animation techniques we're g...

Where All Leaves Fall (yet a temporary name) is visual novel project with some game-alike interactivity. This project is being developed by "anteia" with active contributors: Pedro Correia, João Correia and Marco Balsinha. This is an initial sketch presentation where we've debated possible technologies, illustration and animation techniques we're g...

Web-based communication technologies become a widely available and recognizable tool these days. It is now common knowledge to know how to use e-mail, instant messaging, blogs, and social networks, among others. Socially this represents an ever increasing ability to communicate both within a group and external to it. However, from the author point...

This is a visual presentation of some of the GEOMS2 features and possible uses to them.

Due to the nature of seismic inversion problems, there are multiple possible solutions that can equally fit the observed seismic data while diverging from the real subsurface model. Consequently, it is important to assess how inverse-impedance models are converging toward the real subsurface model. For this purpose, we evaluated a new methodology t...

Numerical reservoir models are nowadays a common tool in any oil and gas reservoir characterization project. Geostatistical seismic inversion is one of the available methodologies that allow one to retrieve acoustic and/or elastic three-dimensional models from seismic reflection data. Then, the standard approach is the transformation of these imped...

This was a in-house presentation for research center CERENA. It was made to document and explain how a particular implementation of Block Centroid Sequential Indicator Simulations works, as well as everything that revolves around it. It explains the reader the kind of data that is used and that is produced as well as show some case-studies.

This is the ShapeWORKS software presentation. This was an in-house software presentation and tutorial for research center CERENA. ShapeWORKS was designed to allow users an easier approach at characterizing complex features in oil reservoir by using Sequential Indicator Block Simulation (actually it uses Sequential Indicator Block Centroid Simulatio...

This presentation was made to document the python implementation of a spatial bootstrap procedure. The algorithm was eventually presented with a case study at the International Conference IAMG in Madrid 2013.

This presentation was made for a client of research center CERENA. It shows how to use Block Centroid Sequential Indicator Simulation to do characterization of complex shapes in oil reservoir scenarios.

jimFusion was designed to facilitate the manipulation of satellite image to retrieve features. It was also used for downscaling images using in-house techniques developed in research center CERENA. It's development is halted due to project termination and the software never had a free public release. Anyway it's a good demonstration of what can be...

This is the slideshow I use for teaching geostatistics in the "Introduction to geostatistics" and "Reservoir modeling" courses for Petroleum Engineering and Geology and Mining Engineering master degree graduation on IST - Instituto Superior Técnico faculty in Lisbon. It was made to be very visual with particular attention to details such as statist...

This is a series of python scripts (2.7) to teach students how to use python for scientific purposes. The scripts are commented and results are printed. There are scripts for numerical, 2d plot, 3d plot, and so on. These were support material for a Python workshop that physically took place.

This paper aims to constrain the geostatistical seismic inversion method, improving it to match acoustic and/or elastic models with spatial structures interpreted from seismic attribute analysis. A method using seismic attributes as parameters in the objective function was created and inserted within the standard Global Seismic Inversion approach,...

(en) This publication was written for teaching purposes. It shows a user with little programming skills how to program in Python for scientific purposes including GUI and plot programming. Originally it was freely internet distributed by "numist" student association. Nowadays it's been widespread over several forum and Python associations. It is wr...

(en) This publication was written for teaching purposes. It shows user with little programming skills how to programming using SAGE language. Originally it was freely internet distributed by "numist" student association. It is written entirely in Portuguese. As far as I know a translation was never made. (pt) Esta publicação foi feita para ensinar...

(en) This publication was written for teaching purposes. It show how a user with no programming skills can start doing it using Octave programming language. Originally it was freely internet distributed by "numist" student association. It is written entirely in Portuguese. As far as I know a translation was never made. (pt) Esta publicação foi fei...

The necessity in predicting an accurate image of the subsurface has lead to the creation of methods that allow the optimization of the knowledge originated from exploration. Modeling using Discrete Fracture Network (DFN) has come with the advantage of similarity to reality. Instead of characterizing the fractured context as a continuum variable it...