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These methods were further compared to the conventional method of V shale from GR. Net pay criteria were determined by applying a cut-off to volume of shale (V shale), generated from a combination of neutron and density log. Average permeability values of 9 mD based on core data-derived equation. These two zones form the majority of the productive interval in nearly all the existing 49 wells, with an average porosity of 24 and 26% respectively. On the average, radioactive sands make up part of the upper 105ft of the J5000 reservoir complex that is further subdivided into two reservoir zones, J51 and J52, separated by intra-reservoir shale. It discusses the methodology applied using all available data in the field to fully characterise the reservoir. This paper presents an example of reservoir characterization of radioactive sands from the J5000 reservoir complex of the Bemu field, Niger Delta. The question in this case is whether or not the natural gamma ray log can be used as a sand/shale or reservoir/non reservoir discriminator and how it impacts on picking reservoir tops and bases for net pay calculation. If the sources of the sediments are near-by granitic highlands, the sands and gravel may contain zircon or may be highly arkosic (high feldspar content), with high content of K 40. In contrast, sands are characterized by low radioactive content, giving rise to low GR count. This is because GR have a high affinity for radioactive mineral like potassium (K 40), uranium (UR) and thorium (Th), which are contained in shale and would flag off as a high radioactive count on the log. GR log is used for correlation, lithologic identification, and as a shaliness indicator.
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These rocks emit gamma rays with enough energy to get to the detector in the tool.
#Schlumberger techlog if then free
If you have further questions as to recommendations regarding recommended specifications or security, please feel free to contact your local Schlumberger representative.The gamma ray (GR) tool responds to the amount of radioactive material contained within the rocks adjacent to the borehole. It is up to you to configure and maintain your networks and/or system(s) in a secure manner.
#Schlumberger techlog if then software
Similarly, you are advised that the software should be operated in a secure environment whether such software is operated across a network, on a single system and/or on a plurality of systems. You are advised that such minimum specifications are merely recommendations and not intended to be limiting to configurations that may be used to operate the software. The software described herein is configured to operate with at least the minimum specifications set out by Schlumberger. An asterisk (*) is used throughout this document to designate a mark of Schlumberger. Other company, product, and service names are the properties of their respective owners. In addition, covers, page headers, custom graphics, icons, and other design elements may be service marks, trademarks, and/or trade dress of Schlumberger, and may not be copied, imitated, or used, in whole or in part, without the express prior written permission of Schlumberger. These marks may not be copied, imitated or used, in whole or in part, without the express prior written permission of Schlumberger. Schlumberger, the Schlumberger logotype, and other words or symbols used to identify the products and services described herein are either trademarks, trade names or service marks of Schlumberger and its licensors, or are the property of their respective owners. This work contains the confidential and proprietary trade secrets of Schlumberger and may not be copied or stored in an information retrieval system, transferred, used, distributed, translated or retransmitted in any form or by any means, electronic or mechanical, in whole or in part, without the express written permission of the copyright owner.