Optimized exploration resource evaluation using the MDT~* tool

摘要

This paper discusses exploration cost reduction and improved resource delineation benefits that were realized by use of the MDT~* (Modular Formation Dynamic Tester) tool to evaluate exploration prospects in teh Malay Basin of the South China Sea. Frequently, open hole logs do not clearly define fluid content due to low salinity of the connate water and the effect of shale laminae or bioturbation in the silty, shaly sandstones. Therefore, extensive pressure measurements and fluid sampling are required to define fluid type and contacts. This paper briefly describes the features of the MDT~* tool which were utilized to reduce rig time usage while providing more representative fluid samples and illustrates usage of these features with field examples. The tool has been used on several exploration wells and a comparison of MDT~* pressures and samples to results obtained with earlier vintage tools and production tests is also discussed.