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| RESEARCH AND APPLICATION OF PREDICTING ANTI-DRILLING PARAMETERS OF CARBONATE FORMATION |
| ZOU Deyong1，CAO Jifei2，YUAN Jun1，SUN Yuanxiu1 |
(1. College of Petroleum Engineering，China University of Petroleum，Qingdao，Shandong 266555，China；
2. Shengli Petroleum Administration Bureau，Dongying，Shandong 257000，China) |
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Abstract As the important formation that is rich in oil and gas，predicting anti-drilling parameters of carbonate formation is the guarantee for efficient development of oil and gas. Based on anti-drilling parameters measured in lab and on-site logging data，the correlations of the rock drill ability and compressional wave offset time，compressive strength and compressional wave offset time，plasticity coefficient and Poisson's ratio，and the correlation between compressional wave offset time of rock surface and the down hole-logged compressional wave offset time，compressional wave offset time and shear wave offset time were studied by means of mathematical statistics. The mathematical models were established to predict anti-drilling parameters of carbonate formation. By substituting the logging data into the prediction model for calculations，the prediction accuracy is up to 90%. Using the established mathematical models，the anti-drilling characteristics of marine formation in Yuanba block were researched and that will provide the reasonable basis for bit selection and drilling parameters optimization.
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Received: 27 November 2010
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2011, Vol. 30 
