2012-01-30_GENERAL DOCUMENTS - P2008046

Home Browse Search

than used to develop the permit temperature limits. Based on the testing and sampling of the outcrop approximately 1 mile away from the permitted well_ onsite field observations and literature review, AMSO has concluded the following: Formation Name Depth (feet bus) Geology Uinta Formation 6 0 -240 Black Sulphur Tongue 240 -265 Uinta Formation 5 265 -3.50 Based on the field observations at the outcrop dated January 23. 2012. provided by. Western Water & Land. Inc. (WW L). consultants to AMSO. the Uinta Formation 6 and 5 do not contain oil shale. Core samples from surface to approximately 500 feet bgs had not taken and evaluated. For future projects, core samples should he Teti ieved and analyzed f o r confirmation. particularly for projects w hose project lilt= well exceeds the planned one year duration for this pilot pr WWI. also sampled the outcrop of the Black Sulphur Tongue and the chemical analysis showed that the oil content varies between 0.63 and 2.51) gallons /ton (gpt), with an average of 1.4 gpt. The concentration used to derive the permit temperature requirements was 30 gpt, or approximately twenty times less. By adjustin the reaction constant by a factor of twenty, the equivalent temperature for shale oil to be produced is an increase in 50 degrees Fahrenheit (deg F) in temperature. 'I he proposed new temperature requirements are as follows from surface to 350 feet: Forma_ tionName- -_ - -- F into Formation 6 Black Sulphur 'T'on`gue Uinta Formation 5 Below Uinta Formation 5 Temperature (deq F) 400 — 450 451 — 460 461 — 470 471 — 480 481 — 490 491 — 500 Depth' ( feet) 0 -230 230-270 270-350 350 sandstone. siltstone, and minor marlstone (lacks oil shale) gray to very light brown marlstone sandstone, siltstone, and minor marlstone (lacks oil shale) Temperature Monitoring no requirements "Table 1 no requirements Table 2 *note: The Black Sulphur "Tongue depth has been approximated to 240 to 265 feet. However. for the purpose of temperature monitoring, AMSO has proposed to increase the top and bottom depths. by 10 and 5 feet respectively. to account for the uncertainty. Table 1 Table 2 Number of Days 633 341 186 103 58 33 Temperature (deq F) 350 — 400 401 — 410 411 — 420 421 — 430 431 — 440 441 — 450 Number of Days 633 341 186 103 58 33 An automatic alarm will sound when 450 deg F is reached for the region monitored below 350 feet bgs. A second automatic alarm will sound in the event that the temperature within the Black Sulphur Tongue inter\ al (230-270 feet) reaches 500 deg F. The EPA has reviewed the requested modification and agrees that the suggested approach is reasonable. given the much lower concentrations or the lack of oil shale that exists in that portion of the well bore.