塔里木盆地奥陶系碳酸盐岩复杂油气藏的特性

油藏地质与开发地质综合分析表明，塔里木盆地奥陶系碳酸盐岩油气藏具有不同于常规油气藏的特性，具有油气分布的广泛性、油气性质的多样性、油气聚集的成层性与非均质性、油气产出的不稳定性等特性。储层强烈的非均质性、油气成藏与调整的多期性是形成油气藏特殊性的两大基本地质条件。塔里木盆地奥陶系大面积含油气、油气水分布复杂、少数高产稳产井支撑大部分产量的特殊碳酸盐岩油气藏具有普遍性，需要采取针对性的勘探开发一体化组织方式。

Characteristics of the complex O rdovician carbonate reservoirs in the Tarim Basin

Multidisciplinary analyses of reservoir geology and exploitation geology reveal that the Ordovician carbonate reservoirs in Tarim Basin are differentwith conventional reservoirs.They feature in extensiveness of oil/gas distribution，diversity of oil/gas property，layering and heterogeneity ofhydrocarbon accumulation，and instability of oil/gas production.There are two basic geological conditions controlling the formation of these special reservoirs，namely great reservoirheterogeneity andmultiˉphase hydrocarbon accumulation and latemodification.The special carbonate reservoirs thathave large oil/gas-bearing area，complex oil/gas-water contacts and a small amount ofwellswith high and stable production contributing to bulk of the oil/gas production are common in the Ordovician carbonates in Tarim Basin.Therefore，an integrated exploration and development strategy should be employed.