... Abstract Cement Evaluation Logs are generally used to evaluate the quality of the cement sheath behind the casing or liner before a well test or production operation is performed in the well. In many countries, regulatory authorities require that cement evaluation logs be done in every well...

...Introduction Abstract Well cementing is an important operation during drilling and completion of oil wells. The cement sheath must maintain well integrity behind the casing and provide long-term zonal isolation to ensure safety and prevent environmental problems. Some of the uses of cement...

... Abstract Cement is a major material component in the construction and sealing of hydrocarbon wells. Well leakage through cement is a problem that increases maintenance costs and poses threats to surrounding communities and the environment. This study focuses on reducing gas leakage potential...

... integrity and well barriers. The well completion preparation and complex cleaning requirements are time consuming, representing up to 16% of the total well time. This typically requires multiple clean-up runs after cementing the lower completion (production liner) and before running the upper completion...

... well control annular pressure drilling Conductor mud line suspension well isolation cement diverter gas migration drilling operation North Safaniya liner cement slurry hydrostatic pressure Upstream Oil & Gas platform shallow gas formation loss circulation zone recommendation...

... on the lower two zones to be able to determine commercial hydrocarbon gas rates. The first major challenge was for zonal isolation of the lowest zone, expected to be a highly fractured zone that might also be stimulated. A cement plug was designed to be deployed by means of coiled tubing (CT) for accurate...

... In deep wells, high temperature and pressure conditions require that the cement slurry must remain pumpable long enough to allow placement and also must have enough density to overbalance the underground formation pressure. The cement slurry should also be environmentally friendly and should...

... to be temporarily or permanently isolated utilizing cast iron, composite or sand plugs capped with cement that must maintain integrity and be able to tolerate high differential pressure across the plug during hydraulically fracturing the upper zones. The subject paper is a review of the design philosophy, planning...

... Several groups have conducted research in the lab to determine the effect of carbonic acid on well cements. Kutchko et al. (2007) , Duguid et al. (2006) , and Barlet-Gouedard et al. (2006) have recently examined the effects of exposure to carbonic acid on well cements under carbon capture...

... WSO technique in OH, which can bring many wells back to economical production. zonal isolation cement open hole well logging water shutoff correlation operation coiled tubing real time system well integrity foect evaluation execution log analysis upstream oil & gas inflation...

... with cement. This successful WSO treatment positively impacted the overall performance of a dead horizontal oil producer with 4,000 ft of reservoir contact. The WSO resulted in decreasing the water cut from 68% to 0%, and revived the dead well with 10 thousand barrels per day (MBOD) oil gain. Real-time...

... a fiber optic telemetry enabled coiled tubing (CT) conveyed inflatable packer capped with cement. Fiber Optic Coil Tubing (FOCT) provides real- time downhole temperature, pressure (inside and outside the CT) and casing collar locator (CCL) measurements used to achieve accurate packer setting depth...

... of expandable casing clad to repair wells with casing leaks across the high-pressure zone. In such wells, the leak was located across Arab-C in production liner. Then, the leak was squeezed off with cement. After that, the casing window was milled below the leak and a short radius curve section was drilled...

... dictated directionally drilling an extended-reach well with an 8-1/2-in. horizontal-hole section over 13,900 ft (4237 m) in length. It was apparent from the outset that directionally drilling the 8-1/2-in. section was going to be extremely challenging. Once drilled, running and cementing the 7-in. liner...

... intrusion and improve recovery efficiency is proposed. This paper discusses the process to create the fracture barrier and the benefits of the completion methodology supported with extensive simulations for the different scenarios. hydraulic fracturing barrier fracture waterflooding cement...

... 1/8" open hole at 10,600 ft at 88 ° and capping it with cement and gel using coiled tubing (CT). Historically, it has been difficult, if not possible, to perform mechanical water shut-off in open horizontal well, as inflatables are quite sensitive to be set in open hole. This paper shows...