Cement Bond Evaluation With a Logging-While-Drilling Sonic Tool

Wang, Ruijia; Chang, C.; Coates, R.; Michel, Franck; Halbert, Morgan; McCaslin, J.C.

doi:10.30632/t60als-2019_wwww

Cited by 2 publications

(1 citation statement)

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“…In recent years, NMR technology has made important progress in the study of reservoirs and fluids. For example, the combination of NMR and mercury intrusion data can be used to evaluate the pore structure of reservoirs. − According to NMR logging data, the properties and contents of crude oil invading the drilling fluid can be detected. , According to the correlation between the relative permeability measured in the laboratory and based on NMR data, the relative oil/water permeability in the reservoir can be calculated to evaluate the nature and capability of reservoir fluid production . A comparative study of the NMR data of full-scale diameter and standard size cores shows that the full-scale diameter can better reflect the characteristics of reservoirs .…”

Section: Introductionmentioning

confidence: 99%

Classification of Reservoirs and Fluids in Tight Sandstone Based on the NMR Logging Technique─A Case Study of the Upper Paleozoic in the Ordos Basin

Yang,

Lu,

Tang

et al. 2023

ACS Omega

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The Upper Paleozoic strata in the Ordos Basin are dominated by tight sandstone gas reservoirs characterized by strong heterogeneity and widely distributed aquifers. Laterally, there is no evidently continuous distribution of water and gas, and longitudinally, the gas and aquifers are mostly in isolated intersections without uniform gas–water contact, rendering difficulties for effectively identifying the reservoir and fluid properties by using traditional mud logging technology. To solve these problems mentioned, the reservoirs were classified by integrating the T 2 spectra of cores obtained through nuclear magnetic resonance (NMR) logging, regional geological characteristics, and gas test results. It is indicated in the result that the “three-division” method can reflect the type of storage space, and the structural movement and sedimentary thickness in the basin are primary factors for the formation of reservoirs of various types. The “nine-division” method is closely related to characteristics of “initial tightening and subsequent accumulation” of the basin and the gas test results, which can give insights into natural gas charging status in the tight sandstone samples, thereby effectively identifying fluid properties.

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Section: Introductionmentioning

confidence: 99%

Classification of Reservoirs and Fluids in Tight Sandstone Based on the NMR Logging Technique─A Case Study of the Upper Paleozoic in the Ordos Basin

Yang,

Lu,

Tang

et al. 2023

ACS Omega

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Common well cements and the mechanism of cement-formation bonding

Lupyana

Maagi

2020

Reviews in Chemical Engineering

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This article reviews the common well cements and describes the basic nature of the cement-formation bond in zonal isolation and its effects on the mechanical and hydraulic performance. The cements are Classes G and H Portland well cements. The cement-formation interface bonding mechanism is a combination of the mechanical indentation of the cement hydrates that interlock to the formation surface and the chemical reactions that occur between the cement slurry and constituents of the rock grains. Mechanical indentation occurs as the hydration products epitaxially grow at the formation surface. The degree to which each of these processes accounts for the formation of the bond is unknown. Here we provide a review of well cement and cement-formation bonds and a discussion of the possible factors that are proposed to influence the microstructural, chemical, and mineralogical properties at the cement-formation interface. In addition, we present some findings about how these factors affect the mechanical and hydraulic performance of the cement-formation bond in zonal isolation.

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Cement Bond Evaluation With a Logging-While-Drilling Sonic Tool

Cited by 2 publications

References 0 publications

Classification of Reservoirs and Fluids in Tight Sandstone Based on the NMR Logging Technique─A Case Study of the Upper Paleozoic in the Ordos Basin

Classification of Reservoirs and Fluids in Tight Sandstone Based on the NMR Logging Technique─A Case Study of the Upper Paleozoic in the Ordos Basin

Common well cements and the mechanism of cement-formation bonding

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