Submitted on: 31 July 1999.
Revised on: 27 August 1999.
Accepted on: 18 September 1999.
SPE JOURNAL
Submitted on: 11 June 2001.
Revised on: 29 June 2001.
Accepted on: 24 July 2001.
SPE JOURNAL
http://reply.papertrans.cn/3/286/28510/28510-23.png
http://reply.papertrans.cn/3/286/28510/28510-24.png
http://reply.papertrans.cn/3/286/28510/28510-25.png
http://reply.papertrans.cn/3/286/28510/28510-26.png
http://reply.papertrans.cn/3/286/28510/28510-27.png
http://reply.papertrans.cn/3/286/28510/28510-28.png
Submitted on: 28 July 1999.
Revised on: 27 August 1999.
Accepted on: 02 September 1999.
SPE JOURNAL
Submitted on: 02 December 2007.
Revised on: 11 January 2008.
Accepted on: 25 January 2008.
SPE JOURNAL