塔里木盆地石油勘探实现突破的重要方向

An important petroleum exploration region in Tarim Basin

对国内外古隆起区成功的勘探实践及塔中古隆起的区域地质和石油地质特征的研究表明 ,塔中地区基本具备形成大油气田的必要条件。塔中隆起形成早 ,后期持续稳定发展 ,下古生界巨型构造发育。石炭系泥岩盖层之下具有多套生储盖及其组合 ,石炭系下部不整合是塔里木盆地构造演化和油气成藏等方面最重大的事件。构造演化的特殊性和丰富多采的油藏类型造就了塔中地区石炭系泥岩盖层之下区域分布广泛的复合油藏体系。对塔中地区油气勘探要整体考虑 ,施工时采取一定的保护性措施 ,发现大油田目标定可实现。

The successive petroleum exploration cases of foreign paleo?-uplifts were comprehensively researched,and the regional and petroleum geology characteristics of Tazhong Uplift were analyzed.The results show that there are some conditions for forming a large petroleum field in Tazhong Uplift of Tarim Basin.Tazhong Uplift took its shape earlier and developed steadily in the later period.There are many huge to large structures in the Lower Paleozonic deposition and a series of source-reservoir-cap compositions under the seal of Carboniferous mudstone.The unconformity in the Lower Carboniferous was the most important event during tectonic evolution and played the most important role during the formation of hydrocarbon traps.The specialty of tectonic evolution and the varied types of oil pools in the Tazhong Uplift resulted in a regional and widespread composite petroleum system under the regional seal of Carboniferous mudstone.It is suggested that oil and gas exploration in the Tazhong Uplift should be considered as a whole.Some oil pay protective measures should be taken during drilling in order to find big oilfields in the near future.