A theory on predicting drilling fluid density windows while drilling and its engineering application

被引：0
|
作者：
Wu C. [1 ]
Chen X. [1 ]
Wang L. [1 ]
机构：
[1] Sinopec Research Institute of Petroleum Engineering, Beijing
来源：
Wu, Chao (wuchao9138@163.com) | 1600年 / Science Press卷 / 37期
关键词：
Drilling fluid density windows; Geological statistics; Northeast Sichuan exploration area; Prediction while drilling; Stochastic inversion;
D O I：
10.7623/syxb201603012
中图分类号：
学科分类号：
摘要：
Based on rock mechanics methods in combination with seismic exploration theories, a model that uses seismic data to directly retrieve pore pressure is established through investigating the quantitative relationship between seismic records, rock physical parameters and pore pressure. According to the geological statistical characteristics of rock mechanical parameters, as well as logging, drilling and other real-time information in the actual drilling process, this study predicts pore pressure of the strata to be drilled using a stochastic inversion method. Based on the inversion results of pore pressure, in-situ stress, rock strength, collapse pressure and fracture pressure are further solved. Through comprehensive analysis of the predicted parameters, the safe drilling fluid density windows of target strata are finally predicted while drilling. This method has been used for engineering application in the HB exploration area of northeast Sichuan. Field application results show that this method has high predicting precision, simple real-time operation, stable calculation process and good application in drilling. © 2016, Science Press. All right reserved.
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页码：399 / 405
页数：6
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  • [1] Aadnoy B.S., Angell-Olsen F., Some effects of ellipticity on the fracturing and collapse behavior of a borehole, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 32, 6, pp. 621-627, (1995)
  • [2] Zohreh M., Junin R., Jeffreys P., Evaluate the borehole condition to reduce drilling risk and avoid potential well bore damages by using image logs, Journal of Petroleum Science and Engineering, 122, pp. 318-330, (2014)
  • [3] Aadnoy B.S., Ong S., Introduction to special issue on borehole stability, Journal of Petroleum Science and Engineering, 38, 3-4, pp. 79-82, (2003)
  • [4] Lu Y., Chen M., Yuan J., Et al., Borehole instability mechanism of a deviated well in anisotropic formations, Acta Petrolei Sinica, 34, 3, pp. 563-568, (2013)
  • [5] Zhang J., Borehole stability analysis accounting for anisotropies in drilling to weak bedding planes, International Journal of Rock Mechanics and Mining Sciences, 60, pp. 160-170, (2013)
  • [6] Bell J.S., Practical methods for estimating in situ stresses for borehole stability applications in sedimentary basins, Journal of Petroleum Science and Engineering, 38, 3-4, pp. 111-119, (2003)
  • [7] Jin Y., Chen M., Zhang X., Study on prediction for borehole stability before drilling, Acta Petrolei Sinica, 22, 3, pp. 96-99, (2001)
  • [8] Jin Y., Chen M., Yang X., Prediction of safe mud density window by interval velocity before drilling, Chinese Journal of Rock Mechanics and Engineering, 23, 14, pp. 2430-2433, (2004)
  • [9] Jin Y., Chen M., Wu C., Borehole stability prediction before drilling for formations under the second section in an exploration well, Petroleum Exploration and Development, 35, 6, pp. 742-745, (2008)
  • [10] Jin Y., Chen M., Prediction of borehole stability by seismic records, Acta Petrolei Sinica, 25, 1, pp. 89-92, (2004)
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