| 应用层间速度差分析在塔里木盆地北部地区预测油气分布 |
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| 关键词:differential interformational velocity analysis (DIVA) seismic hydrocarbon indication velocity analysis Tarim |
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| Application of the Differential Interformational Velocity Analysis for Predication in Northern Tarim Basin |
| This paper discusses emphatically how to apply the Differential Interforma-tional Veolocity Analysis (DIVA) to the seismic indication hydrocarbon and how to fix in with the geological environment in northern Tarim basin.We think that the DIVA si not only applicable to porosity and gas prediction, but also to oil indication because similar DI-VA anomaly also results from the oil accumulation. We use the method of veloctity axis translation instead of the simple"overlain" for the construction of DIVA curve to move out the influence of interval veloctity natural increase with depth.
A case of a new exploring area, Maigaiti trap is disscussed. The DIVA profile for line 92-I crosses one wildcat-well, well M3, which was obtained a high-productivity from Car-boniferous. Along the area, the DIVA anomaly extend twoard northwest which is the low position in the trap rather than the high point of the trap. We think next drill should lo-cate on the northwest of the M3 in according to DIVA anomaly rather than the east part, a higher position of the tyap. A year after it , well M4, located on the onorthwest of the M3, was drilled and found a very good productivity in Carboniferous.
Lastly, we extend the application of DIVA into three dimention or plane anomaly. The plane DIVA anomaly can be used to delimite oil-bearing area. A successful experience was obtain in Daliya oil-field of Tarim basin. The oil-bearing area of the production beds can be delimitated and the quantity of oil accumuntion on basis of the quality of the DIVA plane anomaly. After this, very good productivity on commercial scale was obtained in many producing-wells in the DIVA anomaly area. |
| Chen Kaiyuan,Sheng Linke,Du Ningping.1996.Application of the Differential Interformational Velocity Analysis for Predication in Northern Tarim Basin[J].Acta Geoscientica Sinica,17(z1):72-77. |
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