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Dynamic effects example, simple well trajectory. KOP = kickoff point, <b>EOB</b> =...
Published: 10 September 2020
Fig. 1 Dynamic effects example, simple well trajectory. KOP = kickoff point, EOB = end of build, TD = total depth. More
Proceedings Papers

Paper presented at the SPE Formation Damage Control Symposium, February 14–15, 1996
Paper Number: SPE-31083-MS
... by different operators in a variety of formations with varying applications. The primary question asked by an operator relates to the benefit of Extreme Overbalance (EOB) versus current perforation techniques of underbalance (UB) or modest overbalance for well control. Of course this question spawns a whole...
Journal Articles
SPE Prod & Oper 14 (03): 187–196.
Paper Number: SPE-57390-PA
Published: 01 August 1999
..., a number of jobs have been run by different operators in a variety of formations with varying applications. The primary question asked by an operator relates to the benefit of extreme overbalance (EOB) versus current perforation techniques of underbalance (UB) or modest overbalance for well control...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 3, 2001
Paper Number: SPE-71671-MS
... Abstract The Extreme Overbalanced Perforating (EOB) technique has been successfully applied in a variety of locations around the world both in ‘hard rock’ and ‘soft rock’ formations. In certain applications, it offers definite advantages over other perforating techniques. One-Trip Perforating...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29507-MS
... Standardization for Offshore Projects Kanika Singh and Hyun Buki Jeon, American Bureau of Shipping; Hans Petter Ellingsen, DNVGL; Hyunsun Do, Samsung Heavy Industry; Jin Seong Son, Hyundai Heavy Industry; Gi Eob Min, DSME; Byoung Min Jeong, KOSHIPA; Dong Woo Kim, KOMERI; Do Wook Kang and Hyun Chang Shin, DNVGL...
Proceedings Papers

Paper presented at the SPE Eastern Regional Meeting, October 22–24, 1997
Paper Number: SPE-39208-MS
... improvements. Eleven wells were selected to evaluate their responses to several different stimulation technique. High pressure perforation washing. Re-perforating with high density charges, extreme overbalance surging (EOBS), selective injection packer acidizing (SIP), and coiled tubing acid injection were...
Proceedings Papers

Paper presented at the SPE Western Regional Meeting, March 21–23, 2012
Paper Number: SPE-154164-MS
... as an economical solution to produce the wells. This gas-assisted perforating process uses an extreme overbalanced (EOB) condition by using energized gas to simultaneously perforate and stimulate a well in a single intervention. During an EOB perforating application, wellbore pressures will exceed the fracture...
Proceedings Papers

Paper presented at the SPE International Improved Oil Recovery Conference in Asia Pacific, October 20–21, 2003
Paper Number: SPE-84913-MS
... this Cretáceous formation, a conventional DST operation considering the operational requirements in this project was implemented. Proper determination of potential gas and fluid production called for the application of techniques such as extreme overbalanced perforating (EOB) in order to assess fully...
Proceedings Papers

Paper presented at the SPE International Symposium and Exhibition on Formation Damage Control, February 15–17, 2006
Paper Number: SPE-98026-MS
... systems and the ability to monitor real time bottom hole treating pressures during an EOB (extreme overbalanced) perforating treatment. The real time data proved to be invaluable for determining the effectiveness of the stimulation treatment as well as optimizing the duration of the production test...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, April 14–16, 1997
Paper Number: SPE-38042-MS
... usually lies, the theoretical basis underlying its algorithms, the methodology for its exploitation, the preparation of input data to the program, and finally some practical examples of its use. Extreme over balance (EOB) perforating is not considered in this paper. More information on how to decide...
Journal Articles
J Pet Technol 48 (02): 154–159.
Paper Number: SPE-30527-JPT
Published: 01 February 1996
... are in the same reservoir there are significant differences requiring different hydraulic stimulation approaches. This paper addresses the more difficult to fracture Romeo interval by first describing the problem of Romeo formation fracturing followed by a discussion of the extreme overbalance (EOB) operations...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-1743
... geophysics iteration seismic data gauss-newton elastic waveform inversion Elastic waveform inversion using Gauss-Newton method Dong-Hoon Sheen1,2 *, Chang-Eob Baag1, Kagan Tuncay2 and Peter J. Ortoleva2. 1 School of Earth and Environmental Sciences, Seoul National University, Seoul, Korea 2 Laboratory...
Proceedings Papers

Paper presented at the 2004 SEG Annual Meeting, October 10–15, 2004
Paper Number: SEG-2004-1850
... Tuncay1, Chang-Eob Baag2 and Peter J. Ortoleva1. 1 Laboratory for Computational Geodynamics, Indiana University, Bloomington, IN, USA 2 School of Earth and Environmental Sciences, Seoul National University, Seoul, Korea Summary Seismic waveform inversion is commonly studied by the least-squares method...
Proceedings Papers

Paper presented at the 2003 SEG Annual Meeting, October 26–31, 2003
Paper Number: SEG-2003-2295
... layers Dong-Hoon Sheen1,2*, Kagan Tuncay1, Chang-Eob Baag2, and Peter J. Ortoleva1. 1 Laboratory for Computational Geodynamics, Indiana University, Bloomington, IN, USA 2 School of Earth and Environmental Sciences, Seoul National University, Seoul, Korea Summary We present a velocity-stress staggered...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-0442
... A technique for improving the efficiency of finite element solutions in magnetotelluric modeling Dong-Hoon Sheen*, Seoul National University; Hee Joon Kim, Pukyong National University; and Chang-Eob Baag. Summary This paper presents a finite element method which gives fast and accurate numerical...
Proceedings Papers

Paper presented at the IADC/SPE Asia Pacific Drilling Technology, September 7–9, 1998
Paper Number: SPE-47807-MS
... these techniques. Following are the methods used to prove the effectiveness of this testing program. Extreme Overbalance Perforating1,2,3 The extreme overbalance (EOB) surge technique that was chosen for the Nilam field was designed to compare underbalance and EOB. In this procedure, tubing conveyed perforating...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13850128
... with instantaneous phase only Objective function and model updating We use the exponential instantaneous phase and define the misfit function as follow, (m) = ecal i eobs i 2 dt 0 T sr = d + iH{d} Ecal u + iH{u} Eobs 2 dt 0 T sr = d Ecal u Eobs 2 dt 0 T sr + H{d}Ecal H{u} Eobs...
Journal Articles
J Pet Technol 50 (02): 61–67.
Paper Number: SPE-39417-JPT
Published: 01 February 1998
... others, have been tested in various fields in the U.S. (Fig. 1). The most promising methods include tip-screenout fracturing (TSO), hydraulic fracturing with liquid CO2 and proppant, and extreme- overbalance (EOB) technology. Use of these methods and some advances in the technologies are described next...
Journal Articles
J Pet Technol 53 (09): 56–57.
Paper Number: SPE-0901-0056-JPT
Published: 01 September 2001
... the formation. The patented methods differ in their approach, but each involves a generic process that can be called EOP. Applying large overpressures to exist- ing perforations is termed extreme overbalance (EOB) surging. In EOB methods, the idea is to simultaneous- ly create and stimulate the channel...
Proceedings Papers

Paper presented at the International Oil and Gas Conference and Exhibition in China, November 7–10, 2000
Paper Number: SPE-64661-MS
... and ARCO methods differ in their approach, but each involves a process that may generically be called extreme overbalance perforating (EOP). On the other hand, applying large overpressures onto existing perforations is termed extreme overbalance surging (EOB surging). In extreme overbalance methods...

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