The significance of large variations in oil properties of the Dai Hung field, Vietnam
The Dai Hung Oil field, offshore Vietnam, is comprised of a complex subsurface structure containing stacked reservoir sequences typically found in many other Southeast Asian fields. Combined with areal fault compartmentalization, this situation has led to the observed, large variations in oil properties. Furthermore, the depositional environment in terms of burial history has created a unique overpressure situation which also had an affect, particularly on the crude saturation conditions of individual reservoirs. For commercial and technical reasons, this situation required a detailed analysis, both in terms of variation in crude assay and live oil properties. For whole crude properties: gravity, K factor, wax content and pour point-graphs were drawn up using a large data base of worldwide crudes against which the Dai Hung data could be validated. In case of PVT properties (bubble point and formation volume factor) existing industry correlations were examined. It could be concluded that the sweet, medium gravity and moderately waxy Dai Hung crude has whole crude properties which are comparable to other, similar crudes. The general framework of crude properties established is suitable to type other crudes, even if limited information is available. Of the existing PVT correlations tested, it was found that Standing`s correlation for the oil formation volume factor and the Kartoatmodjo-Schmidt correlation for the bubble point fitted the Dai Hung crude data the best. For the lower shrinkage Dai Hung crudes the Malaysian oil formation volume factor correlation by Omar-Todd gave the best data fit.
- OSTI ID:
- 103903
- Report Number(s):
- CONF-950326-; TRN: IM9541%%342
- Resource Relation:
- Conference: Annual SPIE Asia Pacific oil and gas conference and exhibition: towards more cost effective technology and quality management in the petroleum industry, Kuala Lumpur (Malaysia), 20-22 Mar 1995; Other Information: PBD: 1995; Related Information: Is Part Of Asia Pacific oil and gas conference: Proceedings; PB: 592 p.
- Country of Publication:
- United States
- Language:
- English
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