TECHNICAL PROGRAM
ATI Technical Evaluation of Historic Data
ATI and PV signed an agreement on November 18, 1998 that permitted ATI to review and evaluate existing data collected by the TOTAL and Idemitsu as well as PV to assess the hydrocarbon potential of Blocks 102 and 106. The data package made available for ATI consisted of two dimensional (2D) seismic lines, well logs, sedimentology, biological and geochemistry information. The quantity and quality of the data are summarized below.
The seismic data included 55 lines in Block 102 and 94 lines in Block 106 acquired and processed by TOTAL in 1989 and 1990, and 30 lines in Block 102 acquired by Idemitsu in 1993. Approximately 9200 km of seismic data was obtained during these acquisitions. The seismic grids were oriented from SW-NE and NW-SE. Both the TOTAL and Idemitsu seismic data were fully processed for migration sections. ATI was permitted to review paper print copies of the seismic lines.
Well log data from three wells 103-TH-1X, 102-CQ-1X and 102-HD-1X were provided to ATI for review and evaluation. The well data was comprehensive and adequate. Porosity and water saturation data, including interpretations by previous investigators, were also available for review. The raw well logs and related interpretations warranted a relatively high level of confidence.
Biological analyses based on samples from cuttings, sidewall cores and cores taken from the three wells were performed by TOTAL, Idemitsu and their contractors. The purpose of these tests was to date the formations and identify their depositional environments. Biological data were only available from two wells: 102-HD-1X and 102-CQ-1X. Borehole cuttings for the entire interval 110 – 3095 m (TD) in well 102-HD-1X were analyzed by Geochem Group Limited (GGL), a contractor for the Idemitsu, for biostratigraphical and lithostratigraphical determinations. Micropalaeontological and palynological studies were conducted by the Vietnam Petroleum Institute (VPI) on borehole cuttings from the 120 – 3030m interval in well 102-CQ-1X with 292 samples for Micropalaeontology, 73 for Palynology and 20 for Nannofossil determinations. The analyses were reportedly carefully done and therefore should provide reliable test results.
The geochemistry data provided to ATI included Total Organic Content (TOC), Hydrogen Index (HI), Oxygen Index (OI), Tmax, and S2 measured on the cutting and ditch samples from all three wells. The final well report stated that the Idemitsu conducted hydrocarbon generation and expulsion modeling.
The quantity of well log data released for the three wells was adequate including the electric, image and master logs. The quality of most of the well log data is good.
The three top ranked oil prospects; Tien Lang, Chi Linh and Yen Tu, have been identified in Block 106 based upon our interpretation of seismic, gravity and magnetic data. The prospects are located on the basement high and are surrounded by Eocene, Oligocene-Miocene sediments. These sediments are expected to be the major source rocks in the area. The primary targets of the prospects are fractured pre-Tertiary carbonates. Secondary targets are sandstones of Paleocene and Eocene formations. The three prospects are very similar to features which are productive in the adjacent Beibu Wan Basin to the east, and to recent discoveries in the onshore extension of the Song Hong Basin. Two of the prospects are summarized below.
