... and can harm future generations due to exposure to the contaminated resources. The solution discussed here is a potential use of the casing storage of idle wells for housing pulverized blades mixed with Portland cement when the wells are considered for plug and abandonment. geologist geology...

... sample made of cement. High strength cement was used so that the samples had similar mechanical properties to unconventional reservoir rocks. With this methodology, we created multiple samples with identical surface roughness and features, allowing us to isolate and test other parameters...

... Abstract The Cohesive Zone Experiment (CZE), captured the effect of time, temperature, and pressure on the behavior of adhesive bonding between oilwell cements and casing. The CZE captured the behavior of bond failure as a function of displacement, showing the degree of compliance in the bond...

... Abstract Ultrasonic and sonic logs are commonly used to evaluate the quality of cement placement in the annulus of a pipe and its potential to perform as a barrier. In some cases, we observe that the log response is in conflict with the expectations on the outcome of the cementing job...

... unwanted migration of reservoir fluids. The static structural geometries of the wellbore (casing, cement, and near-wellbore rock) are modeled at specific, critical times during the life of the well, (e.g., after stimulation, after MIT). The results suggest some general design parameters to help mitigate...

... Abstract Cementing is an extremely important part in completion that is mainly dependent on successful wellbore clean-up of drilling fluid or mud. As a unique strategy, a cleaning fluid (or series of fluids) called as spacer (or spacer train) is first deployed to displace the mud and clean...

... be capable of sealing at both high and low operating temperatures. In order to eliminate the wait time for the swellable packer to swell an inflatable bridge plug was used to anchor the scab liner in place and allow cement to be pumped and squeezed out through the bore of the scab liner into the formation...

... There are several disadvantages to cementation with the conventional Portland cement in geothermal wells where harsh environments include high acidity and high temperature. A few include: Abstract In the Salton Sea Field of Imperial County, California, the operating company successfully...

... Abstract Cementing a string in one stage is a challenging task, especially in the presence of weak formations. Cement slurry losses during placement is highly possible if the equivalent circulating density (ECD) exceeds 11 lb/gal during placement. A conventional method to overcome...

... Abstract Recently, a number of external casing failures on a group of relatively new wells in the Kuparuk field of Alaska prompted an investigation into the cause. The investigation determined that external surface casing corrosion failures had occurred near the top of the casing cement within...

.... Its reservoir is a turbidite composed of an interbedded mixture of sandstone, siltstone and shale. The average permeability is 12 md (to gas). Abstract This paper describes the application of a flexible cement system to isolate pay zones, spaced 1 m apart, in the Barbara gas field...

... be complicated. One specific challenge is to construct a well where the cement sheath(s) will not fail and allow interzonal communication. The temperature fluctuations and the associated mechanical stresses transmitted to the cement sheath can cause the cement to crack. This cement failure can lead to steam...

... Cost effective drilling operations in this environment calls for casing the higher permeability lower pressured formations with the lower permeability high-pressure formations in a single stage cementing operation. This often results in lost circulation, running shales, and occasional hole pack...

... completely. RST - PLT - GHOST were recorded on these wells to determine the origin of this water influx and a CBL was recorded to see the state of the cement of Liners. Following the results of the operations carried out, a study was undertaken in order to see the method to be used for the optimization...

... artificial intelligence society of petroleum engineers sidetrack application machine learning drill pipe reduction cement directional drilling well planning casing and cementing drilling equipment well logging annular pressure drilling completion installation and operations well control spe...

...) it accounts for the dynamic geologic processes of grain sedimentation and compaction, and the diagenetic rock transformations; and (2) it reproduces the mechanical rock properties. The main input parameters are the grain size distribution, the final rock porosity, the type and amount of cement and clay...

... mud weights in excess of 15 lbm/gal, casing with a wall thickness of more than 0.625 in. and special cement materials. Standard cement bond logging tools, however, may not be well suited to evaluate the extreme casing conditions or analyze the casing/cement interface because of the acoustic properties...

... Abstract In recent years specialized cements have been developed for use in the oilfield. These cements have ranged from very lightweight to very heavy cements. They have included additives such as glass or ceramic beads to alter their properties. With an increased use of these cements...

... to-date indicate that both zeolite and silica may be cementing agents, the grain-bonding strength depending on the grain surface area. Further, the temperature, injection rate, and pH of the alkaline solution, and "curing time" are important process parameters that will be further investigated...

... Abstract Hydraulic isolation of wellbore casing and cement is critical for the completion of petroleum wells. Zonal isolation prevents contamination of groundwater by fluids in the wellbore and allows conformance control of 1 , 2 the injected fluids. New lightweight cement formulations have...