Organization
1.Schlumberger,Beijing 100004,China 2.School of Petroleum Engineering,Southwest Petroleum University,Chengdu Sichuan 610500,China;3.Logging Company,Western Drilling Engineering Ltd.,CNPC,Karamay Xinjiang 834000,China)JOURNAL OF SOUTHWEST PETROLEUM UNIVERSITY(SCIENCE & TECHNOLOGY EDITION),VOL.31,NO.6,45-50,2009(ISSN 1674-5086,in Chinese