... that consume hydrogen, generate undesired gases, and alter pore structures of wellbores. Here, we present observations of biogeochemical alteration of wellbore cement after interactions with H 2 . Experiments were conducted with a wellbore cement core and shale submerged in synthetic formation brine...

... the reactivity of wet supercritical CO 2 , at 150°F and 3000 psi on Portland cement plugs (class G), for exposure of up to 5 weeks. For nanoporous media, such as cement, diffusion is believed to be the major mass transport mechanism. To quantify the extent of the alteration (mineralization/dissolution) on fluid...

... Abstract Hydraulic fracturing is a widely applied method to extract shale gas and oil by injecting large volumes of hydraulic fracturing fluid (HFF) into shale reservoirs through a well containing steel casing and a cement annulus. Numerous studies have been conducted on the rock-fluid...

... drilling fluids and materials tailored spacer system lost circulation well control annular pressure drilling drilling fluid management & disposal upstream oil & gas urtec stage-cementing tool unconventional resource technology conference application technology conference...

..., mostly less than 1 mm in width, sealed with blocky calcite, are oriented NE-SW (Set 1) and WNW-ESE (Set 2). Two Set 1 fractures have drusy cement on parted faces and were possibly open prior to drilling. A few subvertical sealed fractures with different orientations are also present. Bed-parallel natural...

... Abstract Today’s North American land drilling and cementing are facing new challenges due to increased hydrocarbon extraction, especially in the Permian basin. For instance, operators in the region frequently face severe losses during drilling or cementing, which are not prevalent in the other...

..., reveal a complicated diagenetic history consisting of thirty-two major diagenetic events. The earliest diagenetic features were developed during shallow burial and include the formation of phosphatic and calcitic concretions, pyrite framboids, replacive dolomites, compacted fractures, and the cementation...

... Abstract Quality annular cement is critical to ensuring adequate zonal isolation as well as casing protection and support during the lifespan of a well. The exploration of unconventional resources creates unique challenges with regards to cement integrity. Casing pressure fluctuation...

... & gas cement secondary fia vein fia URTeC: 2472 Using Fluid Inclusion Salinity Data to Reduce Uncertainty in Petrophysical Sw Calculation New Application of an Old Technique in Unconventional Reservoirs Benedek Gál*1, Zsófia Poros1, Edwin Ortega1, 1. ConocoPhillips Company Copyright 2020...

... can be effectively stimulated via hydraulic fracking. The industry currently uses several geochemical signals (e.g. Si/Al and Si/Zr) to identify authigenic silica phases present in an unconventional reservoir. Cemented horizons are prime candidates for placing hydraulic fracks due to the strengthening...

... Abstract Hydraulic fracturing operation is a common method to improve the production of unconventional reservoirs. Pressure cycles created by alternating loading and unloading procedures of hydraulic fracturing is a crucial factor impacting cement sheath integrity. At high pressure condition...

... Abstract Frequently exposed weak formations require the use of lighter slurries, and with increased wellbore pressures encountered during fracture stimulations, stronger cements are essential. Lighter, stronger cementing technologies are the key to ensuring well integrity and enabling simple...

... confirms that quartz overgrowths have a complex growth history. Previous workers (Kraishan et al. 2000) suggested that CL patterns in quartz cement are largely due to trace elements rather than defects and that aluminum varies consistently between each cement phase. Electron Backscatter Diffraction (EBSD...

... description cement drilling operation fracture face complex reservoir orientation information CT scan propagation direction concretion fracture drilling-induced fracture society of petroleum engineers slant core plane hydraulic fracture sand pack twist hackle drilling mud URTeC: 2902624...

... national energy technology laboratory cement formulation technology laboratory DOE unconventional resource economics information foamed cement well cement NETL Energy Economics Upstream Oil & Gas cement zonal isolation doe national energy technology laboratory University URTeC...

... cement property cement chemistry cement formulation Upstream Oil & Gas size distribution acid soluble cement acid solubility casing and cementing cement solubility lateral Williston Basin hydraulic fracturing solubility rate acid treatment spe-178683-m urtec acid soluble...

... with compaction and de-watering, we infer that bacterial sulphate reduction had a major impact during early diagenesis as it resulted in significant calcite cement precipitation. Calcite cements infill bioclasts and foraminifera chambers, thereby significantly reducing intra-granular porosity. Fine grained...

... Management flowline corrosion Production Chemistry Upstream Oil & Gas Thickness cement steel membrane carbon steel protection cathodic protection URTeC corrosion Corrosion Inhibition oilfield chemistry well integrity mill scale mitigating corrosion perforation coating corrosive...

.... Samples were also prepared using Ar-ion polishing to look at pore evolution under field-emission scanning electron microscopy (FE-SEM). Based on SEM petrography, we observed several diagenetic features that formed prior to hydrocarbon migration. These features include carbonate cement, quartz cement...

..., but most fractures in outcrop are barren joints, whereas most of those in the subsurface are lined or sealed with cement. We compare rare fracture cements in outcrop with subsurface examples to test the hypothesis that some fractures in outcrops are equivalent to subsurface fracture systems. We compare...