T total porosity phit, which includes the pore space in sand and shale. Jan 26, 2016 rapidly assess the resource potential with simple or advanced measurements. Petrophysical analysis of the bakken interval, nance. A practical use of shale petrophysics for stimulation design optimization. Our core petrophysical applications run on a network pc platform using microsoft windows 7 and 10 as our preferred operating system. Pdf well log based geomechanical and petrophysical. The petrophysics of shales and organic rich shale associated with carbonates. A practical use of shale petrophysics for stimulation. The upper shale ranges in thickness from 6 to 10 ft 1. Shale is composed of silt, clay and their bounded water which will not flow. Csugspe 8145 petrophysical characterization of the eagle.
Top 10 landmark papers in petrophysics and formation. Absolute permeability is very low and relative permeability will be affected by the copresence of oil and gas within the avalon shale. Crains petrophysical handbook gas shale reservoir analysis. Shale volume is the most important starting point, usually calibrated to xray diffraction or thin section point counts.
Today, there are more than 9,000 wells producing, most of which were drilled after 1987. Elan module, users can save and then easily reapply models to new datathe ability to combine outputs from several models improves the accuracy of final results. Petrophysical and geochemical evaluation of an avalon. Petrophysical approach for estimating porosity, clay. Our affordable software has an intuitive graphical user interface, easy to use with readable bold buttons and plenty of options our user friendly las well logs editor and viewer allows to plot curves immediately, achieving a top quality display. Petrophysics in gas shales eric eslinger eric geoscience, inc. Optimize every element of your prospecting operations worldwide using our advanced oil and gas exploration software a suite of comprehensive digital solutions for each stage of a petroleum systems approach to discovering hydrocarbons. The barnett shale, discovered in 1981, is being produced from more than 8,000 wells today wang 2008. Haynesville shale of northwestern louisiana and northeastern texas. Models can also be transferred to other projects and curves can optionally be used instead of constants for endpoint, curve uncertainties, and other control parameters.
However, this approach has been successfully employed in many reservoirs. Elan elemental log analysis is used to quantify kerogen and calculate porosity and gas saturations. A comprehensive deterministic petrophysical analysis. All shale plays are not clones of the barnett shale rick rickman, mike mullen, erik petre, bill grieser, and donald kundert, spe, halliburton. Shale petrophysics stimulation petrophysics consulting, llc. He has developed course manuals, newsletters, web pages and two software packages. Abstract the most common fallacy in the quest for the optimum stimulation treatment in shale plays across the country is to treat them all just like the barnett shale. Utley petrophysics, in conjunction with shalequest partners, has put together a detailed geologic and petrophysical study of the fayetteville shale. A more detailed sescription and example from a shale gas can be found in petrophysics in gas shales by e. All shale plays are not clones of the barnett shale conference paper october 2008 with 202 reads how we measure reads.
The selection of the shale formation water resistivity is problematic as is the underlying assumption that shale behaves as an archie reservoir. There are installations of the package in 27 countries around the world. Petrophysical approach for estimating porosity, clay volume, and water saturation in gasbearing shale. This software based analysis establishes a proper multivariate statistical. Applied open hole petrophysics this program will take the participants through a series of domain, blended andor software classes that cover physics for wireline and mwdlwd logs, log and core analysis, interpretation and integration to obtain a comprehensive petrophysical characterization at well, reservoir and field scales. A practical use of shale petrophysics for stimulation design. Crains petrophysical handbook visual analysis of lithology. Production from the antrim shale in the michigan basin started in 1936. The eagle ford shale has long been known as a shale resource rock, but only recently has it been discovered as a viable shale play formation technological advances in hydraulic fracturing and horizontal drilling have been one of the drivers, as well as the high gas prices prevalent in 2007 and early 2008.
Well log analysis for reservoir characterization aapg wiki. An integrated petrophysical approach for shale gas reservoirs. Petrophysics of unconventional reservoirs training course. This paper presents a synthesis of the technical challenges that face shale gas petrophysics and collates practical solutions based on what is currently known.
This chapter discusses petrophysics related to the estimation of porosity, water saturation sw, perme. Shale source rocks have higher resistivity 25 to 250 ohmm and usually have extra high gr 150 to 300 api units. After santos successfully started gas production at the moomba191 in shale gas reservoirs, unconventional exploration expanded and various companies, including beach energy, senex, drillsearch, strike energy, santos and a number of joint ventures, initiated shale and tight gas and oil exploration and evaluation programs in cooper basin. Wallace international can tackle any petrophysical challenge. Rock properties database and analysis system and unified rock modeling software. Although these software packages are similar in general principle, they differ in individual methods of implementation, flexibility, and assignment of uncertainty. How to use the interactive petrophysics ip software. The fayetteville shale play is currently dominated by southwestern energy, but there is substantial interest from several other companies. The delaware basin, a western subbasin of the permian basin, is located in west texas and southeast new mexico. Petrophysicists interpret acquired well log data from newly drilled wells from a field to provide insights on reservoir rock properties such as relation between porosity and permeability on log scale, porosity, initial water saturation, 2d volumetrics, calculating net reservoir rock ntg, etc. Csugspe 8145 petrophysical characterization of the. Rock properties for success in shales ted holden, john pendrel, fred jenson, and peter mesdag. Unless shale volume is reasonably calibrated, nothing else will work properly.
Pdf well log based geomechanical and petrophysical analysis. The following description was provided by bob everett and eric eslinger who jointly developed and use this software in their consulting practice. You will learn how to use the combiner to build a final model from several models and how to compute petrophysical results from the final. Get a look at your reservoirs potential ahead of time. Unlike conventional plays, shale plays have very low permeability and are both the trap and seal. Interactive petrophysics calculate shale volume youtube.
Petrophysical considerations in evaluating and producing shale gas resources article pdf available february 2010 with 3,658 reads how we measure reads. In this system log analysis is treated explicitly as a petrophysical inverse problem. The mineral volumes were input in weight percent and the software requires volume. Effective evaluation of shale gas reservoirs by means of. It should be noted that the shale units in most studies consist of quartz. The method has survived the introduction of computer software, the output of which was initially text only, became one of the plots available with early alphanumeric printerbased graphics, and is implemented at this time in many technical software packages as an interactive application. Unconventional shale petrophysics the shale gas analysis module, together with geosteering, multimineral analysis and geomechanics capabilities, expands geologs ability to successfully meet the unique challenges faced in shale plays. Elan will give the tools to build multimineralmultifluids log interpretation. The program comes with tight oil, sandstone, shale gas, and carbonate examples, and. Petrophysical characterization of the barnett shale. Up to 4 staff engage in a daily critique session of ppls work and perform a cutdown version of the same tasks the next day. Holmes established his own consulting practice, involving petrophysics, technical due diligence, consulting to the united nations worldwide, expert witness activities, and instructor to ihrdc and the university of brunei. The purposes of this association are to advance the science of geology. Nov 29, 2009 interactive petrophysics is one of the best petrophysical software in the industry.
The fayetteville shale study is available to the public. Log data are far more abundant than core, and sample a greater volume of the reservoir out there, so accurate log models are essential for our evaluations of plays. Introduction to black shale petrophysics course 6, sun 94 3d seismic attributes to define structure and stratigraphy a handson course course 7, sun 94 workshop. To be successful, a petrophysical methodology for the evaluation of shale gas deposits has to be founded on approaches that sit outside the conventional range of thinking.
Primary focus will be on estimating basic components of reservoir qualitytoc, primary mineralogy, porosity, saturation, permeability, hydrocarbon in place. Hydrocarbon are stored only in pore space in sand matrix. Implementations include elan, multimin, statmin, etc. Our petrophysics software package has been commercially available since 1985. Petrophysics is central to the integration of a wide spectrum of related geoscience and engineering disciplines. The following definition and petrophysics model are a typical shaly sand formation model which assumes. Elan module, users can save and then easily reapply models to new datathe ability to combine outputs from several models improves the accuracy of final. Petrophysics and software development, and 3d analytical.
Elan yogeswaren founder, ceo and chairman geoscale inc. This mineral model may be used as an input in the mineral solver application of interactive petrophysics ip, or can be used in other comparable packages like elan and satmin jadoon, 2016. Elan elemental log analysis is used to quantify kerogen and calculate. Petrophysical evaluation and uncertainty analysis of. Calculation of the gamma ray index is the first step needed to determine the volume of shale from gamma ray log. Free gas saturations calculated from an archie approach in the woodford shale. A comprehensive deterministic petrophysical analysis procedure for reservoir characterization. For those of you who know us, hds has been in business since august of 1982. Layer a is a very shaly sand, layers b and c are clean sands. The american association of petroleum geologists is an international organization with over 38,000 members in 100plus countries. Rapidly assess the resource potential with simple or advanced measurements. The best data for the latter is a langmuir isotherm that provides a. Jan 21, 2017 how to calculate shale volume in interactive petrophysics 4.
Petrophysics aspects of shale gas and techlog for unconventional shales evaluation are combined to provide knowledge on how to use well logs to evaluate organic shale reservoirs. Its strength is the user friendliness compare to other formation evaluation software. A case study from the horn river basin, canada 292 in the case of a shale gas reservoir, an interval with high uranium content log values can be estimated to have a high organic material content glorioso and rattia, 2012. Wallace international, llc has at its disposal bestinclass petrophysical analysis software and computing technology. Petrophysics and well logs american association of. The difference between elanplus and traditional petrophysical analysis.
In 1998, michael combined consulting activities with software development, to form digital formation, inc. Edgar velez north america land principal acoustics and. This research involves the analysis of petrophysical properties using data from the available logs such as caliper, gamma ray, density, neutron, sonic, and resistivity logs, the available open hole logs data imported into the appropriate interactive petrophysics software ip. We are a pioneering leader in providing windows based solutions for log analysis software. The basic mineral mix is also developed from this data. Understand global, elan, gamls models, overview of methods. Petrophysics pty ltd conducts parallel or remote, documented petrophysical training concurrently with technical consulting. The industrys focus on oil assets has influenced the resurgence in horizontal drilling activity in the basin targeting the tight sands and organic shales of. Spe 115258 a practical use of shale petrophysics for. Geolog multimineral analysis and interpretation using. The approach to formation evaluation used by stimulation petrophysics consulting is a structured methodology incorporating all the wireline log data open hole and cased hole, mud logging, drilling and core evaluation that is provided or available into a single interpretation. Quanti elan method of schlumberger techlog software was. A number of commercial packages exist, including global and elan from schlumberger, optima from western atlas, ultra from halliburton, and probe from scientific software. Lithology probabilistic models 2 crains petrophysical handbook.
Our petrophysical software brings you a combination of robust petrophysical workflows and automation that can power your subsurface evaluations. Annotated logs showing layers picked on the basis of shale volume. See the complete profile on linkedin and discover elans. These resources, until recently considered only the source rock for hydrocarbon reservoirs, are now recognized in their own right for their huge potential for both oil and gas production. Well log is one of the most fundamental methods for reservoir characterization, in oil and gas industry, it is an essential method for geoscientist to acquire more knowledge about the condition below the surface by using physical properties of rocks. The petrophysical properties of kerogen are listed in table 1. View elan yogeswarens profile on linkedin, the worlds largest professional community. The elan program is a generalpurpose inverse problem solver. Mineralogical modelling and petrophysical parameters in. Shale is usually more radioactive than sand or carbonate, gamma ray log can be used to calculate volume of shale in porous reservoirs. Rock properties database and analysis system and unified rock modeling. Petrophysics training courses petrophysics pty ltd.
Petrophysics and software development, and 3d analytical modeling of stimulated reservoir volume for tight and shale reservoirs by guang yu a thesis submitted to the faculty of graduate studies in partial fulfilment of the requirements for the degree of master of science department of chemical and petroleum engineering calgary, alberta. Petrophysical analysis of the bakken interval, nance petroleum, larson 1126 well, richland county, montana prepared for the bakken short course rocky mountain section of the aapg jackson, wyoming september 24, 2005 digital formation, inc. Eng petrophysicist experienced in the evaluation of conventional, unconventional, shale and tight oil reservoirs. Petrophysical considerations in evaluating and producing. Geoloil petrophysics analysis software for windows, macos. A complete gas shale log evaluation requires calibration to core for thermal maturity and a metric to equate toc to adsorbed gas. There is no doubt that the barnett shale play in the ft. Spe 115258 a practical use of shale petrophysics for stimulation design optimization. The middle member consists of a silty dolostone and ranges in thickness from 10 to 40 ft 3. Geoframe advanced petrophysical interpretation using elanplus.
See the complete profile on linkedin and discover elan s. The volume of shale expressed as a decimal fraction or percentage is called v shale. Let us show you how danomics petrophysics software can take your reservoir characterization to the next level. A general understanding of petrophysics, including the concept of response equations for tools, and the methods used to calculate shale volumes, porosities and water saturations. Petrophysical article about petrophysical by the free. An appreciation of cationexchange based methods for water saturation determination would be beneficial, as would an understanding of mineralogy effects on tool responses.
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