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Anomalous

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Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 22–24, 2019
Paper Number: URTEC-2019-85-MS
... deviations away from this classical behavior for Permian Basin Wolfcamp shale (oil) wells have been attributed to anomalous diffusion (AD). The objective of the current study is to systematically investigate other potential causes of deviations from TLF. The conventional log-log diagnostics used...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31297-MS
...Abstract Abstract Detection of anomalous events in practical operation of oil and gas (O&G) wells and lines can help to avoid production losses, environmental disasters, and human fatalities, besides decreasing maintenance costs. Supervised machine learning algorithms have been successful...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31234-MS
... to occur often. The ML Model architecture can process data that is captured by OSI PI historian, predict anomalous sanding events in advance, and is shown to be scalable to other wells in GOM. It is noted from this study that streamlined ML architecture and outputs simplify exploratory data analysis...
Journal Articles
Petrophysics 61 (05): 434–449.
Paper Number: SPWLA-2020-v61n5a3
Published: 01 October 2020
... 434 449; 16 FIGURES; 2 TABLES. DOI: PJV61N5-2020a3 Automatic Detection of Anomalous Density Measurements due to Wellbore Cave-in Deepthi Sen1*, Cen Ong2, Sribharath Kainkaryam2, and Arvind Sharma2 ABSTRACT We present a workÀ ow for automatic detection and À agging of faulty formation density log...
Journal Articles
OIJ 2020 (09): 26–29.
Paper Number: OIJ-2020-09-026-029-RU
Published: 30 September 2020
...M. Yu. Nikulina; N. V. Myshevsky; E. V. Nikulin The article highlights the volume of work performed related to the search and exploration of deposits. The article considers anomalous (atypical) objects identified by the company's geologists in the areas of the Irkutsk region and the Republic...
Journal Articles
OIJ 2020 (08): 18–21.
Paper Number: OIJ-2020-08-018-021-RU
Published: 01 August 2020
... repeated change of line of settlement, to ascertain the presence of specific changes in the context between the two adjacent lines of the comparison. The first part explains the nature of formation of the upper Jurassic anomalous sections of the Bazhenov formation as the result of the accumulation...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 11–14, 2019
Paper Number: SPE-197553-MS
... Figure 3 ( α − β ) relationship for diffusion flow mechanisms. Figure 4 Gaussian probability density function (PDF) behavior for anomalous diffusion flow. Abstract The main objective of this paper is understanding the phenomenal anomalous diffusion flow mechanisms...
Proceedings Papers

Paper presented at the SPE Russian Petroleum Technology Conference, October 22–24, 2019
Paper Number: SPE-196930-MS
... a new method for determining the hydrogen index of formation fluids with anomalous physical and chemical properties directly in rock samples with natural saturation. Kerosene hydrogen index in test experiment "measure-saturate-measure" was determined quite accurately. Average fluids hydrogen index...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216900
... be compromised by soft zones indicative of anomalous soil-filled seams or voids in karst. Typical quality control measures during construction rely on rock coring and probes that fail to adequately evaluate the spatial extent of such anomalous conditions. Current non-destructive testing (NDT) methods based...
Journal Articles
Journal: SPE Journal
SPE J. 24 (06): 2609–2634.
Paper Number: SPE-197049-PA
Published: 05 August 2019
...Shuai Liu; Peter P. Valkó Summary In this work, we develop a well–based fractional–production–decline model, which resorts to anomalous diffusion to characterize the heterogeneity of complex fracture networks and can be conveniently used to interpret the rate and cumulative data in the early...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 22–24, 2019
Paper Number: URTEC-2019-293-MS
.... In this new work, the formulation was generalized to a succession of flow regimes. This enables the new decline curve to reproduce a succession of periods with power-law behavior, as predicted by recent work on anomalous diffusion models. By construction, this decline curve is fully consistent with RTA...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 22–24, 2019
Paper Number: URTEC-2019-358-MS
... this portion of the reservoir, but is not mobile. The Dunvegan clearly demonstrates permeability as the main control on the anomalous fluid distributions, with several other tight sandstone plays showing similar relationships, although often more subtle, such as observed in the Cardium, Montney, etc...
Proceedings Papers

Paper presented at the SPE Western Regional Meeting, April 23–26, 2019
Paper Number: SPE-195305-MS
... & Gorelick (1995 ), Noetinger et al. (2001 )] and the explicit introduction of natural fractures as high-conductivity pathways [ Dershowitz et al. (2002 )]. The multifaceted nature of transport in fractured rocks has been addressed through concepts based on anomalous diffusion by fractional calculus...
Proceedings Papers

Paper presented at the SPE Middle East Oil and Gas Show and Conference, March 18–21, 2019
Paper Number: SPE-194831-MS
... Abstract Understanding the phenomenal anomalous diffusion flow mechanisms in unconventional fractured porous media is one of the objectives of this paper. It aims to convert this understanding to analytical and numerical models that could help in managing reservoir performance. The second...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 23–25, 2018
Paper Number: URTEC-2902890-MS
... Abstract In the current work, we try to develop a new production decline model based on anomalous diffusion, which is attributed to the conductive fracture network with complex geometry in the reservoir scale, for the purpose of interpreting some abnormal phenomena (for example, the long...
Proceedings Papers

Paper presented at the SPE Trinidad and Tobago Section Energy Resources Conference, June 25–26, 2018
Paper Number: SPE-191203-MS
... The anomalous diffusion equation for a slightly compressible fluid for the reservoir ( Figure 1 ) (Chen and Raghavan, 2015) At the initial time, equilibrium condition is existed in the system. So, (2) p ( x , o ) = p i The inner boundary condition (3) q...
Proceedings Papers

Paper presented at the SPE Europec featured at 80th EAGE Conference and Exhibition, June 11–14, 2018
Paper Number: SPE-190768-MS
... Abstract We discuss anomalous gas production data observed downdip of oil production in a thick oil reservoir. At the onset of production, the wells under consideration exhibited a sharp rise of the GOR with large disparity between estimated gas in solution and actual gas production...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28829-MS
... Abstract The years 2014-2017 marked a period of anomalous and extreme Loop Current (LC) activity that resulted in significant impact on offshore operations for the first 18 months, followed by a 4- to 6-month period of more typical behavior and then 15 months of uncharacteristic inactivity...
Journal Articles
Petrophysics 59 (02): 136–152.
Paper Number: SPWLA-2018-v59n2a2
Published: 01 April 2018
.... Sandstones from Água Grande Formation, Recôncavo Basin, Brazil, present anomalous porosity due to development of chlorite coating and is therefore suited for studying the nuclear magnetic response to this effect. Samples from this unit were classified into three groups according to their texture, composition...
Proceedings Papers

Paper presented at the SPE Canada Unconventional Resources Conference, March 13–14, 2018
Paper Number: SPE-189809-MS
... of reservoir engineering. In this paper, we try to investigate the anomalous diffusion phenomenon caused by the heterogeneity due to the fracture network on the reservoir scale. Firstly, we revisit the physical background of the single-phase flow diffusivity equation by discussing the equivalent single...

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