BEGIN:VCALENDAR VERSION:2.0 METHOD:PUBLISH PRODID:-//Tendenci - The Open Source AMS for Associations//Tendenci Codeba se MIMEDIR//EN BEGIN:VEVENT DESCRIPTION:--- This iCal file does *NOT* confirm registration.\r\nEvent d etails subject to change. ---\r\nhttps://www.spegcs.org/events/2064/\r\n\r \nEvent Title: Drilling: Special Considerations in the Design Optimization of High Rate, Multistage Fractured Shale Wells\r\nStart Date / Time: Oct 10, 2012 11:30 AM US/Central\r\nLocation: Petroleum Club of Houston\r\nSpe aker: Catherine Sugden and/or Suri Suryanarayana\r\nGoogle\r\nhttp://maps. google.com/maps?q=800+Bell+Street,Houston,TX,77002\r\n\r\nForecast\nhttp:/ /www.weather.com/weather/monthly/77002\r\n\r\n\r\n \r\n Typical shale wel l completions involve massive, multistage fracturing in horizontal wells. Aggressive trajectories (with up to 20°\;/100 ft dog legs), multistage high rate fracturing (up to 20 stages, 100 bpm), and increasing temperatur e and pressure of shale reservoirs result in large thermal and bending str esses which are critical in the design of production casing. In addition, where cement voids are present and the production casing is not restrained during fracturing, thermal effects can result in magnified load condition s. The resulting loads can be well in excess of those deemed allowable by regular casing design techniques. These loads are often ignored in standa rd well design, exposing casing to the risk of failure during multi-stage fracturing.\r\n \r\n \r\n \r\n \r\n \r\n In this work, the major facto rs influencing normal and special loads on production casing in shale well s are discussed. A method for design and optimization of shale well produc tion casing design is then introduced. The constraints on the applicabili ty of different design options are discussed. Load magnification effects of cement voids are described and a method for their evaluation is develop ed. It is shown that thermal effects during cooling create both bending st ress magnification and annular pressure reduction due to fluid contraction in trapped cement voids. This can result in significant loads and new mod es of failure that need to be considered in design. The performance of co nnections under these loads are also discussed. Examples are provided to i llustrate the key concepts described. Finally, acceptable design options f or shale well production casing are presented.\r\n \r\n \r\n \r\n \r\n \r\n The results presented here are expected to improve the reliability o f shale well designs. They provide operators with insight into load effec ts that need to be considered in design of production casing for such well s, and with options for adequate design.\r\n\r\n\n\n--- This iCal file doe s *NOT* confirm registration.Event details subject to change. ---\r\n\r\n- -- By Tendenci - The Open Source AMS for Associations ---\r\n UID:uid2064@spegcs.org SUMMARY:Drilling: Special Considerations in the Design Optimization of High Rate, Multistage Fractured Shale Wells DTSTART:20121010T163000Z DTEND:20121010T180000Z CLASS:PUBLIC PRIORITY:5 DTSTAMP:20240329T120611Z TRANSP:OPAQUE SEQUENCE:0 LOCATION:Petroleum Club of Houston X-ALT-DESC;FMTTYPE=text/html:
Typical shale well completions involve massive, multistage fracturi ng in horizontal wells. Aggressive trajectories (with up to 20°\;/100 f t dog legs), multistage high rate fracturing (up to 20 stages, 100 bpm), a nd increasing temperature and pressure of shale reservoirs result in large thermal and bending stresses which are critical in the design of producti on casing. In addition, where cement voids are present and the production casing is not restrained during fracturing, thermal effects can result in magnified load conditions. The resulting loads can be well in excess of th ose deemed allowable by regular casing design techniques. \; These loa ds are often ignored in standard well design, exposing casing to the risk of failure during multi-stage fracturing.
 \;
In this work, the major factors influencing normal an d special loads on production casing in shale wells are discussed. A metho d for design and optimization of shale well production casing design is th en introduced. \; The constraints on the applicability of different de sign options are discussed. \; Load magnification effects of cement vo ids are described and a method for their evaluation is developed. It is sh own that thermal effects during cooling create both bending stress magnifi cation and annular pressure reduction due to fluid contraction in trapped cement voids. This can result in significant loads and new modes of failur e that need to be considered in design. \; The performance of connecti ons under these loads are also discussed. Examples are provided to illustr ate the key concepts described. Finally, acceptable design options for sha le well production casing are presented.
 \;
The results presented here are expected to improve the
reliability of shale well designs. \; They provide operators with ins
ight into load effects that need to be considered in design of production
casing for such wells, and with options for adequate design.