... Abstract Gelled isolation fluids are used in various applications throughout the oilfield for creating access to a specific segment of the wellbore while leaving the remaining portion of the wellbore unaffected. In single well applications, zones are isolated whereas laterals are isolated...

.... In theory, a casing string will stay centralized without any centralizers in a truly vertical wellbore. This has led to the use of only a sparse number of centralizers, even though many cement bond logs can show poor bonding far below the desired top of cement. In cases of poor isolation the state...

... recent years, industry adoption of open-hole packers allowed the wellbore to be segmented into discrete segments, with each stage isolated in the wellbore through the deployment of carefully sized ball seats installed along the horizontal section as an integral part of the casing or liner. One...

.... Expandable technology applied as a completion/production string facilitates increased fracturing rates, resulting in improved conductivity and enhanced hydrocarbon production. Expandable tubulars can be used in re-entry wells to isolate old perforations, allowing for new zones or new sections within zones...

...Traditional Two-String Systems Historically, two casing strings were set to isolate the differently pressured gas formations in the Barbara wells. A 7 in. casing isolated the upper low-pressure gas zones using a slurry system that consisted of a Class G cement extended with microsilica...

... Services : Characterizing Casing-Cement-Formation Interactions Under Stress Conditions: Impact on Long-Term Zonal Isolation ". SPE 90450 Presented at the SPE Annual Technical Conference and Exhibition in Houston , Texas, U.S.A ., 26–29 September 2004 . Mack , David J. , Dillenbeck...

..., and vice versa, concluding that slope of WOR diagnostic plots should not be used in isolation to identify mechanisms for excessive water production. A more realistic approach is to narrow down the problem and make the diagnostic plots more field-condition specific. Together with other information...

... isolation constraint screening matrix Introduction The drilling and completion options when drilling a well are numerous. Some of the basic options are: drill a vertical well with open or cased and perforated completion, a horizontal well, or perhaps multilateral wells. In multilateral...

... fluids and materials interpretation log analysis casing and cementing acoustic impedance cement property attenuation cement and bond evaluation cement chemistry experiment isolation completion installation and operations petroleum engineer cement evaluation drilling fluid selection...

... in the wellbore was 10 lbm/gal brine. The measured acoustic impedance of the cement solids is in the range of 3-5 MRayl and the USIT could easily distinguish solid, liquid, and gas behind casing. Fig. 1 shows the USIT and CBL log results across one interval with good zone isolation. The logs were run...

.... The J-tool can be re-used with minimal redress. inner liner hydraulic release j-tool operator horizontal well steel ball j-tool upstream oil & gas scckty lateral plug drilling operation kiilti9 blank liner work string engineer isolation redress minimal redress liner psper...

... approach and guideline for field use. This paper examines the effects of fluid and reservoir properties on gelant invasion and dispersive flow behavior in heterogeneous formations. The application of bullheading, mechanical wellbore isolation, and the dual-injection technique is evaluated with reservoir...

..., the lower producing zone, is present throughout the field and contains 65% of recoverable oil in place. P. 145 spe 35664 casing design casing and cementing departure reduction optimization conventional well upstream oil & gas monobore completion well design producer isolation...

... Abstract The Ring Seal Packer (RSP) is a newly patented 1 tool used to help isolate depleted zones from producing well bores in thermally enhanced reservoirs. This paper presents the design of the RSP, deployment methods, and successful field production results. rsp reservoir...

... THROUGH PERFORATIONS exclusion have shown that success can be obtain- sand to bridge. ed if the following factors are given the proper attention. TECHNIQUE SPE 3681 1. Drill and complete the well using optimum hole and casing sizes obtaining isolation between producing horizons or set of perforations. 2...