| PDF: | |
| Time: | 2017 |
| Journal: | Earth Science Frontiers |
| Volumn: | 24 |
| Issue: | 1 |
| Pages: | 257-264 |
| Type: | EI |
| Author: | Xuejiao Qu,Liwei Yang,Youfeng Gao,Pujun Wang |
Abstract: | The designed depth of SK2 is 6 400m, which is the deepest scientific drilling in the East Asia. Previous studies shows that the Xujiaweizi Fault Depression falls in the high geotemperature area, the high geotemperature and possible abnormal pressure are the main challenges for continental scientific drilling. Based on a great deal of geological and geophysical data including regional geological survey, petroleum exploration and exploitation and scientific achievements in the Songliao Basin, we predicted the bottom hole temperature, formation pressure and formation fracture pressure of target strata of SK2. According to the relationship between depth and stastistic of present geotemperatures, geothermal gradients, we predicted the bottom hole geotemperature of SK2 probably range from 238.83~265.11 ℃. According to the relationship between depth and stastistic of formation pressures, and DrillWorks software calculated results, we calculated the formation pressure of Yingcheng Formation, Shahezi Formation and Huoshiling Formation to the bottom of the hole range from 30.54~37.72 Mpa、33.22~59.52 Mpa、59.52~67.18 Mpa respectively; and the formation fracture pressure range from 52.35 MPa to 58.62 MPa, from 61.88 MPa to 105.68 MPa, from 104.57 MPa to 118.03 MPa respectively. |