The match between the openhole and cased hole results is excellent as indicated in the mineralogy track and on the individual yields themselves. Openhole log analysis and formation evaluation, second edition is available in amazon kindle, apple ibooks, adobe digital edition, adobe digital rental edition, and print and adobe digital edition set. May 29, 2014 essentials of modern open hole log interpretation essentials of modern open hole log interpretation by john t. Well logging methods pete 608, sections 600, 700, and 720. This log contains 3 tracks and many different sets of log data. Openhole and cased hole data acquisition and interpretation. Petrophysics msc course notes fluid testing and pressure logs. No mention of moved oil from open hole log analysisi wonder why, 302 pages. Applied openhole log interpretation for geologists and. An alternative method of obtaining open hole logs in horizontal wells examples from the mississippian 5152012 rick reischman thrubit houston don herman thrubit midland. Download brochure register now request an inhouse proposal. At the end of the seminar the participant will be able to perform a full interpretation and will know the uses and applications of several advanced open hole and cased hole logs. Applied openhole log interpretation for geologists and engineers, 1982, 328 pages. Krygowski, senior petrophysical advisor, the discovery group.
The various openhole services offered by schlumberger are discussed in some detail, together with essential methods of interpretation and basic applications. Open hole wireline logging self learning module uio. Crains petrophysical handbook fracture identification. Compressional and shear wave velocities are used for porosity and lithology interpretation as. In addition, eli has the latest technology and tools that provide accurate and complete analysis of the well. This chapter presents a general overview of the mimo pdf problem of log interpretation and. Open hole logs ohl are ran in the uncased borehole. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Applied production logging and reservoir monitoring. Determining suitable water zones from log analysis smu. The software is fully 32bit compliant for windows vista7810 or any associated server versions, including 64bit editions. You will also become familiar with computerprocessed logs. Open hole logging is done when a borehole is penetrated by an open hole log before casing or cementing the wellbore while casedhole logging refers to the logging that is done after the wellbore has been cased.
It is qualitative at best but there can be semiquantitative fracture intensity indicators, based on the frequency of occurrence of particular artifacts on the log curves. A geologists first exposure to log interpretation can be a frustrating experience. Lesa log evaluation system analysis open and cased hole log analysis. Open hole logging refers to logging operations that are performed on a well before the wellbore has been cased and cemented. Cased hole formation evaluation logs are playing a major role in efforts to increase recovery. Dewan essentials of modern openhole log interpretation. Open and cased hole log interpretation petroknowledge. An alternative method of obtaining open hole logs in. Warrior cased hole well logging system scientific data.
This document is designed to give a broad overview of the logging tools, and their applications. Elis slim hole open hole logging tool landsea open hole. Xmac f1 acoustic logging service baker hughes, a ge company. Thus, the new logging tools permit more detailed analysis of coal reservoirs behind the casings. Interpretation and lqc ultrasonic cement evaluation tools corrosion logging tools saturation determination in cased hole pulsed neutron and carbonoxygen tools cased hole resistivity and porosity tools comparison with open hole logs formation testers in cased hole. Introduction to openhole log interpretation free ebook download as pdf file.
Elis slim hole open hole logging tool as the drilling get deeper, the size borehole decreases, and we might end up in a situation whereby the conventional logging tools are too big to fit into them. In other words, the logging is done through the bare rock sides of the. An intensive 5 day training course open and cased hole log. Pdf traditional well log determines the geological and geophysical data of. Dan krygowski is a senior petrophysical advisor with the discovery group, which he joined in late 2006. The few discrepancies are due to the presence of casing collars and some hole enlargement over the upper portion of the interval. Contact our pico technologies office for information on avaliable tools, leadtime, prices, terms, and conditions, and other technology and tools under development. Fundamentals of open hole log interpretation, jim brock, 1984, technology. The tool is lowered into the open hole with the arms retracted against the central body. Introduction to openhole log interpretation porosity clastic rock.
Essentials of modern openhole log interpretation isbn 9780878142330. Pdf basic well logging guide mandeep saini academia. T, 1983, essentials of modern openhole log interpretation. Although the term can apply to any hole section, it is often used to describe techniques and practices applied after a casing or liner has been set across the reservoir zone, such as casedhole logging or casedhole testing. Openhole log analysis and formation evaluation, second edition. There are many applications of production logging in both open hole and. Determining suitable water zones from log analysis. The deeper traces in a vsp have less high frequency. Open hole wireline geology baker hughes, a ge company. Published in 1991, log interpretation principles applications provides a thorough background of log interpretation. Advanced well log analysis shortcourse applied stratigraphix. Dan krygowski is a senior petrophysical advisor with the discovery group, which he. Modern drilling fluids and drilling practices have also contributed to the confusion.
The staff at eli wireline service, llc have many years of field experience dealing with all aspects of wireline work, and includes cased hole, open hole, underground hydrocarbon storage, and porosity storage engineers. Xwell electromagnetic imaging for flood water sweep. All wells, at least when first drilled, have openhole sections that the well planner must contend with. Open to interpretation by ken bradbury copyright mcmxcvi by ken bradbury this script is provided as a courtesy for internet reading. Lesa is windows based software that will provide complete log analysis and interpretation. Our slim hole logging tools provide the solution to these situations. The warrior well logging system employs advanced software and widely available hardware to provide a costeffective solution to well logging requirements for open and cased hole applications in sro, lwd and memory operations. This document is part of a self learning programme designed for new petroleum engineers with limited experience of logging operations. Experienced engineers not directly involved with logging operations but who would like to learn more about the subject may also find the module useful. Data is acquired in one pass, eliminating multiple passes or the need to merge files together. Uncertainties from well log and petrophysical interpretations should be analyzed, quantified and explicitly communicated to the integration team in order to be accounted for in reservoir. Geological interpretation development manager, schlum berger technical. Induction tools use electromagnetic coils to establish magnetic fields that excite current flow in the formation, which in turn excites secondary magnetic fields and current flow in receiver coils in the tool.
Cased hole and production log evaluation provides longawaited information on the uses of cased hole logging tools in the following recoveryworkover applications. At the end of the seminar the participant will be able to perform a quick interpretation in open hole for clean and shaley formations. The name open hole is applied because these logs are recorded in the uncased portion of the wellbore. Essentials of modern openhole log interpretation john t. Before you enroll in this course, we recommend you take the basic log analysis course. The basic cased hole tools can be divided into three general groups. Pdf modern hopen hole log interpretation maria camila. Once you have completed this course we recommend you enroll in either the log quality control seminar or the advanced log analysis course. Digital formation lesa log evaluation system analysis.
Combining the two, the total electrochemical potential is. Well logging methods pete 608, sections 600, 700and 720, fall 20 page 4 of 10 additional reading assignments and references additional reading assignments and references will be uploaded on the e. This technique has also interpretation tools which evaluate the formation. There is a very large range of basic logs that can be run in a well, and an even greater number of derived logs, i.
Prior to running casing, the well planner must consider how the drilled rock will react to drilling fluids, pressures and mechanical actions over time. Casedhole formation evaluation logs are playing a major role in efforts to increase recovery. Modern logging techniques combine logging tools to obtain a more reliable representation of formation properties. Essentials of modern openhole log interpretation dewan, john t. Schlumberger log interpretation principles applications manual.
The spe foundation through member donations and a contribution from offshore europe. This course is covers the whole range of open hole, cased hole and production logging tools and their applications. Open and cased hole log interpretation an intensive 5 day training course 01 05 nov 2020, dubai 29dec19 this course is designed, developed, and will be delivered under. Depth this column gives the depth of interpreted geologic contacts in metres below ground surface. There are two types of well logging open hole logging and casedhole logging. Dewan, essential of modern open hole log interpretation. This is a wide ranging course that effectively covers all the logging techniques both open hole and cased hole. To provide a depth reference between open hole and cased hole measurements and services. The goal of this work is to combine dynamic data with static data to better. The correlation device is used to correlate cased hole measurements with open hole measurements and to estimate shale volume. An open hole logging operation is performed in a portion of a well after it has been. Ohls combine an induction log, spontaneous potential, compensated. Essentials of modern open hole log interpretation dewan, john t. Whats the difference between openhole and casedhole.
Log interpretation principlesapplications schlumberger. Krygowski, senior petrophysicist the log interpretation course assumes no logging knowledge and seeks to establish an understanding of basic petrophysical measurements and interpretation techniques which can be applied to routine tasks and upon which more complex and advanced information and interpretive techniques can be built. Each of the headings used on the borehole log, is briefly explained. All the different types of logs and their curves discussed in this text are of this type. Pdf uncertainty analysis in well log and petrophysical. Essentials of modern openhole log interpretation essentials of modern openhole log interpretation by john t. This modules is used to editing, merging, splicing the log data of. It helps you specify good logging programs with uptodate tools and interpret zones of interest with the latest techniques.