1995 Data Acquisition Program At The Michigan Reservoir Delineation Research Facility

1995 was the most active year in recent history at the test site. Although the initial year of 1983 saw more work, we were still basking in the glow of the modern "oil boom"; the downsizing crash was ahead of us. In 1983, working around the clock, we recorded 13 VSPs, a suite of logs, a reverse VSP, borehole gravity survey, and a 3-D survey in two months of field time. In 1995, a single, four-man Conoco crew worked ten to twelve hour days, for 70 days, and recorded a massive cross-well, orbital vibrator data set-clearly a Herculean task. This paper outlines the pre-survey planning that took place in anticipation of that effort. In addition, we document the single well data acquisition efforts of Conoco, Inc. and Lawrence .Berkeley Laboratory (LBL), and the dipole logging work of Halliburton Energy Services. These data are in the handling stages and processing has not yet begun

Shear-Wave Tomographic Images Of An Oil Reservoir At MIT's Michigan Test Site

We conducted a P- and S-wave crosswell survey with Conoco's orbital vibrator source and three-component receivers at M.LT.'s Michigan Test Site. The receiver and source wells bracket a known oil reservoir. Applying a nonlinear crosswell traveltime tomography method, we reconstruct the velocity structures in the oil reservoir using P- and S-wave data separately. The P-wave tomogram shows a similar image to the one by Matarese (1993), and it does not present much velocity variations in the oil producing zone. However, the S-wave tomogram clearly shows the image of the reservoir zone, which is characterized with low velocities in a pinnacle reef. The S-wave velocities in the reservoir are about 20% lower than those of the surrounding carbonates.Massachusetts Institute of Technology. Earth Resources Laboratory. Reservoir Delineation Consortiu

Design and testing of a highly stable and precise resistivity-meter

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