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ź»êÈµÈ ¼Ò±Ý¹°¿¡ ÀÇÇÑ À¯Á¤¿ë ½Ã¸àÆ®ÀÇ ¿È / Degradation of oil well cement in carbonated brine / session 6 : ģȯ°æ ½Ã¸àÆ®°è Àç·á |
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±èÁ¤Áß ; ¿°±¤¼ö ; Mahmoud M. RedaTaha |
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Çѱ¹°Ç¼³¼øÈ¯ÀÚ¿øÇÐȸ Çмú¹ßÇ¥ ³í¹®Áý, v.13 n.2 (2013-11) |
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½ÃÀÛÆäÀÌÁö(73) ÃÑÆäÀÌÁö(2) |
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ÀÌ»êÈ Åº¼Ò¸¦ Áö¹Ý³»¿¡ ÀúÀåÇϰíÀÚ ÇÏ´Â Àǵµ·Î ÀÎÇÏ¿© ź»êÈµÈ ¼Ò±Ý¹°¿¡ ÀÇÇÑ ÀÌ»êÈ Åº¼Ò ÁÖÀÔ°ø ÁÖÀ§ÀÇ È¯Ã¼ ½Ã¸àÆ®ÀÇ ¿È »óŸ¦ ÀÌÇØÇÏ´Â °ÍÀÌ Áß¿äÇÑ ¹®Á¦·Î ´ëµÎµÇ°í ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â À¯Á¤¿ë ½Ã¸àÆ®ÀÇ Á¾·ùÀÎ Type G ½Ã¸àÆ®¸¦ °¢°¢ »ó¿Â»ó¾Ð (20 ¡ÆC, 0.1 MPa) »óÅÂ¿Í °í¿Â°í¾Ð (80 ¡ÆC, 10 MPa) »óÅ¿¡¼ 28Àϰ£ ¾ç»ýÇÏ¿´´Ù. ½Éµµ 1 km¿¡¼ÀÇ Åº»êÈµÈ ¼Ò±Ý¹°ÀÇ »óÅ (0.5 M NaCl brine)¸¦ °í·ÁÇÏ¿©, ¾ç»ýµÈ ½Ã¸àÆ®¸¦ ź»êÈµÈ ¼Ò±Ý¹°¿¡ 28Àϰ£ ³ëÃâ½ÃÄ×´Ù. ÁÖ±âÀûÀ¸·Î ¿È»óŸ¦ Á¡°ËÇÑ °á°ú, °í¿Â°í¾Ð »óÅ¿¡¼ ¾ç»ýµÈ ½Ã¸àÆ®ÀÇ ¿ÈÁ¤µµ°¡ ´õ ÅÀ» È®ÀÎÇÏ¿´´Ù. |
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Emergent interest in geological carbon dioxide (CO2)sequestration has brought a need for understanding the mechanism of potential degradation of oil well cement (OWC) in carbonated brine. In this paper, Type G OWC paste specimens produced with water to binder (w/b) ratio of 0.45 are hydrated for 28 days under two conditions, room condition (20 ¡ÆC with 0.1 MPa pressure) and an oil well simulated condition (80 ¡ÆC with 10 MPa pressure). Conditions of geosequestration in a sandstone formation at a depth of 1 km, were simulated by bubbling CO2 into a heated vessel containing 0.5 M NaCl (brine). Fresh cured OWC cylindrical specimens were exposed to this environment. Slices of the cement specimens were taken periodically, during and after exposure to quantify degradation progression. The results showed that the OWC hydrated under the elevated condition displayed higher degradation than that hydrated under ambient condition. |