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| Lithology identification method while drilling based on element mudlogging information |
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LI Chun-shan1,2,CHEN Ying-yi3,SUN Wei1
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(1. State Key Laboratory of Continental Dynamics,Department of Geology, Northwest University，Xi'an 110069 .China;2. School of Petroleum Engineering in China University of Petroleum，Qingdao 266555, China ;3. North China Bureau of SI NO PEC, Zhengzhou 450042, Chinn)
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| Abstract: |
| To overcome the difficulties in identifying lithology of fine cuttings, a method was developed to identify lithology while drilling by using element content and spectrum determined by X-ray fluorescence ( XRF) and logging data. The results show that the element content correlates to mineral content of cuttings，and element contents of Si, A1 and Fe correlate to GR logging curve. XRF data can be utilized to calculate shaliness of cuttings and determine the lithology of sandy mudstone formation. XRF spectrogram of the same lithology has some similarity, which can be used for lithology identification. The field data show that such a comprehensive method can improve the accuracy of lithology identification. |
| Key words: element mudlogging well logging X-ray fluorescence (XRF) element content X-ray fluorescence spectrogram lithology identification |
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