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/2670/\r\n\r \nEvent Title: C&P: “Propped Height Validation in Liquids Rich Organic S hales using Recovery Factor Analysis”\r\nStart Date / Time: Sep 24, 2014 11:30 AM US/Central\r\nLocation: Greenspoint Club\r\nSpeaker: Robert Barb a\r\nGoogle\r\nhttp://maps.google.com/maps?q=16925+Northcase+Drive,Houston ,Texas,77060\r\n\r\nForecast\nhttp://www.weather.com/weather/monthly/77060 \r\n\r\nWell performance evaluation in liquids rich shales has received a lot of attention in the literature to date. While there are a variety o f techniques available to estimate effective fracture lengths and areas, t he simplest method so far involves a comparison of volumetric oil in place with estimated ultimate recovery from the wellbore. A hypothesis was pro posed in a major West Texas project recently that suggested slickwater fra cs were only developing 50 to 60 ft of effective propped height regardless of proppant volume pumped. This limited height was validated in several vertical pilot wells with radioactive proppant tracers. When the trajecto ry of the lateral was compared to the pilot well net pay distribution it w as observed that the wells that remained in the limited &ldquo\;sweet spot &rdquo\; had significantly higher recovery factors than those that did not . In addition, when a recovery factor analysis was made of the expected propped interval 120 acre recovery factors the values were in the 8-10% ra nge. When the analysis was done for the entire 300 ft +/- gross pay colum n above and below the propped interval the recovery factors dropped to 1-2 %. In an effort to improve propped height a hybrid slickwater/borate XLG treatment was pumped into a vertical pilot well with tracers run in the p roppant. It was observed that the propped height for the proppant pumped with the crosslinked portion of the job had a tracer height identical to t he 50 to 60ft slickwater conveyed proppant height. The hypothesis there i s that the disconnect between the 2-3 hour break times and the 24-48 hour closure times resulted in a proppant bank suspended in low viscosity fluid s rather than the 500 cp +/- borate system. Subsequent vertical pilot wo rk proposed to improve propped height includes the addition of fiber to he lp retard settling (Schlumberger&rsquo\;s HIWAY system), the use of N2 bub bles to support the proppant (Trican), and forced closure. With regard to forced closure a two pronged approach has been recommended. The first is to force close a vertical pilot well frac with proppant tracers to see if the technique can improve proppant distribution. Once that is validated it is proposed to force close a lateral completion using an annular coile d tubing frac to enable circulation of the proppant that flows back out of the wellbore. All three of these techniques are on the board at this tim e with results expected shortly. --- This iCal file does *NOT* confirm reg istration.Event details subject to change. ---\r\n\r\n--- By Tendenci - Th e Open Source AMS for Associations ---\r\n UID:uid2670@spegcs.org SUMMARY:C&P: “Propped Height Validation in Liquids Rich Organic Shales using Recovery Factor Analysis” DTSTART:20140924T163000Z DTEND:20140924T183000Z CLASS:PUBLIC PRIORITY:5 DTSTAMP:20240329T044251Z TRANSP:OPAQUE SEQUENCE:0 LOCATION:Greenspoint Club X-ALT-DESC;FMTTYPE=text/html:
Well performance evaluation in l iquids rich shales has received a lot of attention in the literature to da te. \; \; \; While there are a variety of techniques available to estimate effective fracture lengths and areas, the simplest method so far involves a comparison of volumetric oil in place with estimated ultima te recovery from the wellbore. \; A hypothesis was proposed in a major West Texas project recently that suggested slickwater fracs were only dev eloping 50 to 60 ft of effective propped height regardless of proppant vol ume pumped. \; This limited height was validated in several vertical p ilot wells with radioactive proppant tracers. \; When the trajectory o f the lateral was compared to the pilot well net pay distribution it was o bserved that the wells that remained in the limited &ldquo\;sweet spot&rdq uo\; had significantly higher recovery factors than those that did not.&nb sp\; \; In addition, when a recovery factor analysis was made of the e xpected propped interval 120 acre recovery factors the values were in the 8-10% range. \; When the analysis was done for the entire 300 ft +/- g ross pay column above and below the propped interval the recovery factors dropped to 1-2%. \; In an effort to improve propped height a hybrid&nb sp\; slickwater/borate XLG treatment was pumped into a vertical pilot well with tracers run in the proppant. \; It was observed that the propped height for the proppant pumped with the crosslinked portion of the job ha d a tracer height identical to the 50 to 60ft slickwater conveyed proppant height. \; The hypothesis there is that the disconnect between the 2- 3 hour break times and the 24-48 hour closure times resulted in a proppant bank suspended in low viscosity fluids rather than the 500 cp +/- borate system. \; \; Subsequent vertical pilot work proposed to improve p ropped height includes the addition of fiber to help retard settling (Schl umberger&rsquo\;s HIWAY system), the use of N2 bubbles to support the prop pant (Trican), and forced closure. \; With regard to forced closure a two pronged approach has been recommended. \; The first is to force cl ose a vertical pilot well frac with proppant tracers to see if the techniq ue can improve proppant distribution. \; \; Once that is validated it is proposed to force close a lateral completion using an annular coile d tubing frac to enable circulation of the proppant that flows back out of the wellbore.  \;All three of these techniques are on the board at th is time with results expected shortly. \;