Analysis of the in situ stress on top of basement, X prospect, the Cuu Long Basin, Viet Nam | |
| Author | Pham, Thi Dung |
| Subject(s) | Cuu Long Basing--Vietnam In-Situ Stress Project--Vietnam |
| Note | A Research Study submitted in partial fulfillment of the requirements for the Degree of Master of Engineering (Professional) in Geoexploration and Petroleum Geoengineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Magnitude and orientation of three principle stresses of the current in situ stress field is the important information that cannot be lacked to understand the process of hydrosphere deformation and evaluation Tectonic-plate models (Moos and Zoback, 1990). In addition, knowledge of the current in situ stress field is the crucial information that cannot be missed when processing Hydraulic Fracturing to improve oil recovery factor, evaluating risk re-operation of faults and some environmental issues related pumping to maintain formation pressure in operation process (Zoback, 2007). In general, the vertical stress, σV, can be determined from the depth of the sea water level, density or sonic logs, vertical seismic lines by Nafe-Drake's formula (Tingay et al, 2003). Minimum horizontal stress, σh, can be calculated from Leak-off test (Breckels and Van Eekelen, 1982), Extended Leak-off test (White et al, 2002) and Hydraulic Fracturing (Haimson and Fairhurst, 1969). However, estimate maximum horizontal stress, σH, is still a challenge because there is no direct measurement techniques. Since the limit of this research study, the student used log-derived input data to define the rock elastic properties Young’s modulus, Poisson’s ratio, Pore pressure and Biot’s constant using standard log ASCII (.las) files of 5 wells in X prospect, Cuu Long basin. However, the physical properties of rocks are affected by the in situ stress and this was determined using mechanical analysis. This study detailed the results of stresses tensor calculation of 5 wells in the X prospect, Cuu Long basin. Nevertheless, only one hydraulic fracturing test is available at E, Oligocene, well 4X. Therefore, the calibrated data is limited. |
| Year | 2011 |
| Type | Research Study Project Report (RSPR) |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Noppadol Phien-Wej; |
| Examination Committee(s) | Pham, Huy Giao;Suwat Athichanagorn; |