The article covers the geological aspects analysis of Vietnam south offshore, studied by the international petroleum companies from 60s of XX century. Analysed the geological exploration works in 1968-1980. Special focus is given to geological exploration of Vietsovpetro JV, performed at Block 09-1 in 1981-1985. The results of such works are currently applied for the development of White Tiger, Dragon, White Bear, Nam Rong – Doi Moi and White Hare fields, as well as for geological exploration works on the nearest offshore blocks. Analysed and summarized data on development of reservoirs/horizons/members in Block 09-1 profile.
The authors considered geological aspect changes and oil accumulation conditions within Block 09-1 by the example of Vietsovpetro fields based on the accumulated data in geology-geophysics. It is reviewed main stages of exploration and development for the existing fields. Provided data on classification of pay zones/horizons/members and seismic-reflecting horizons, classification of sedimentary basins. The assessment of their distribution and isolation peculiarities in well profiles is provided. The distribution of pay zones/horizons/members by fields is analysed. Consistency is specified to determine it in geo-seismic sections of Vietnam continental shelf. The boundaries of seismic horizons, pay zones/horizons/members and sedimentation conditions are correlated.
The article provides results and efficiency of geological exploration in 2014-2019 and appraisal drilling results. Based on the results of performed works, the authors forecasted the proceeding geological exploration and detailing of geological aspects within the area of existing fields of Block 09-1, as well as prospecting areas of neighbouring blocks of SRV continental shelf, to define non-structural traps and marginal fields.
References
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