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Keywords: invasion
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Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0035
... performance of the processing. These questions include the effects of data noise, inaccurate dip input, and drilling fluid invasion. In addition, the depth of investigation and vertical resolution are studied for resistivity and dielectric constant to enable a quantitative comparison with other logs. The...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0028
... Abstract Mud filtrate invasion is a complex and time-dependent process. During the process, a zone of finite size around the wellbore (invasion zone) in which a portion of the initial pore fluids have been displaced by the mud filtrate is gradually generated. As a result, the petrophysical and...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5029
... been crossed, polarization horns, laminations and non-uniform invasion. A case study demonstrates how log property modeling was applied using a fast and practical workflow to improve petrophysical answers. The wells studied are located in the Norwegian sector of the North Sea and penetrate a sequence...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5072
.... To correct for actual fluid saturation in the pore space, we need to account for mud filtrate properties and the invasion profile. We present here a methodology for using a data and physics-driven method to quantify near-wellbore water mud invasion and to correct the final hydrocarbon volume...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5027
... conventional formations, wellbore fluids (of density ρ m ) exert a hydrostatic pressure (P hyd ) that is greater than the reservoir pressure (P Res ) so mud filtrate (of density ρ mf ) invades the formation up to a radius of invasion (r i ). Mud additives quickly create a pseudoimpermeable layer (mudcake) that...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5089
... re-interpreted WL NMR and PVT results, all three showing oil viscosity very close to 8 cP with ±2 cP. The paper documents a workflow, which provides quality control tools to log analysts and it helps understand the time-lapse effect observed on LWD and WL DE (D-T1-T2) NMR caused by invasion in OBM...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-KKKK
... learning Upstream Oil & Gas residual hydrocarbon saturation numerical simulation mud-filtrate invasion invasion SPWLA 60th Annual Logging Symposium, June 15-19, 2019 DOI: 10.30632/T60ALS-2019_KKKKK 1 ESTIMATION OF DYNAMIC PETROPHYSICAL PROPERTIES FROM MULTIPLE WELL LOGS USING MACHINE LEARNING...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-ZZ
... acquired while drilling was implemented to compute water salinities and saturations across the stacked layers. LWD (Logging-While-Drilling) data experiences limited drilling fluid invasion such that relatively shallow depth of investigation (DOI) measurements like capture sigma (Σ), which are sensitive to...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-EEEEE
...SPWLA 60th Annual Logging Symposium, June 15-19, 2019 DOI: 10.30632/T60ALS-2019_EEEEE 1 EXPERIMENTAL INVESTIGATION OF MUD-FILTRATE INVASION USING RAPID MICRO-CT IMAGING Colin Schroeder and Carlos Torres-Verdín, The University of Texas at Austin Copyright 2019, held jointly by the Society of...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-YYYY
... fractures can be misinterpreted as eccentricity or even as a permeable zone with resistive invasion in water sands or with a hydrocarbon-bearing layer, which is especially important for proper casing and cementing decisions. Resistivity modelling is an irreplaceable tool that enables us to uniquely identify...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-C
... conditions challenging for logging. In addition, clay-rich sands, variable invasion and thin beds complicate log interpretation. High quality, targeted data acquisition is therefore essential. Because of the drilling conditions, Logging While Drilling (LWD) has become the most common method of acquiring...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-KKKK
... model assumes no invasion in the formation. The formation resistivity (or conductivity) is assumed to be TI. The model assumes circular borehole. At every depth point, the inversion of the eight unknown R1D model parameters, including horizontal and vertical resistivities and dip, can be stated as...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-DD
...SPWLA 58th Annual Logging Symposium, June 17-21, 2017 1 INFLUENCE OF MUD-FILTRATE INVASION EFFECTS ON PRESSURE GRADIENTS ESTIMATED FROM WIRELINE FORMATION-TESTER MEASUREMENTS Colin Schroeder and Carlos Torres-Verdín, The University of Texas at Austin; Hani Elshahawi, Shell International Exploration...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-OOO
... flowing oil. Completing the entire oil-bearing interval is cost prohibitive. This situation calls for early, accurate identification of zones containing movable hydrocarbons. Filtrate invasion from water-based muds readily indicates oil movability, when the oil is proven to be displaced by water. The...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-TTTT
... measurements such as LWD NMR, density, neutron and resistivity. A unique benefit of LWD measurements is their ability to measure reservoir fluid properties before significant drilling fluid invasion has occurred, they respond primarily to in-situ reservoir fluids and rock matrix. Essentially they are not...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-JJJ
...SPWLA 58th Annual Logging Symposium, June 17-21, 2017 1 HOW THE INVASION ZONE CAN CONTRIBUTE TO THE ESTIMATION OF PETROPHYSICAL PROPERTIES FROM LOG INVERSION AT WELL SCALE? Thibaud Vandamme, Emmanuel Caroli (TOTAL), Serge Gratton (ENSEEIHT) Copyright 2017, held jointly by the Society of...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-K
... OF INVASION WITH TRIAXIAL INDUCTION DATA Gong Li Wang, Aria Abubakar, David Allen, and Su Yan , Schlumberger Copyright 2017, held jointly by the Society of Petrophysicists and Well Log Analysts (SPWLA) and the submitting authors. This paper was prepared for presentation at the SPWLA 58th Annual...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-GGG
... frequency. INTERPRETATION RESERVOIR Wells drilled at the Monument Butte field were done at very low mud weights, which reduced mud filtrate invasion into the formation. We were able to take advantage of this by analyzing the CRIM inverted dielectric data where the laterolog resistivity profile showed no...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-T
... Abstract Most formation evaluation measurements like neutron, density and resistivity, can be influenced by the drilling fluid and by mud filtrate solids. The severity of fluid invasion is mainly a result of the type of mud and the depth of investigation of the individual measurements...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-CCCC
... efficaciously addressed by combining results from both approaches. In simple reservoirs, for instance, the combination of resistivity and NMR reduces uncertainties and can be used to identify and quantify effects such as invasion or water (-free) production. We present a systematic compilation and discussion of...

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