东濮凹陷古潜山勘探潜力分析

东濮凹陷自１９７６年东１井钻穿古生界以来，已完钻潜山探井４６口，其中见油气湿示井２０口，获低产油气流井５口，中生界，上古生界，下石生界和太古界等多套潜山层系均见到较好的汽气显示，具有显示范围广，层系多，勘探程度低的特点，在勘探高成熟期的东濮凹陷，古潜山是一个较为现实有利的勘探接替区，通过重新钻探，有望获得突破。

Formation models of buried hill type pools in Dongpu sag

Buried hills in Dongpu sag consist of many oil bearing strata, which distribute in the Archaeozic, Lower Palaeozoic, Upper Palaeozoic and Mesozoic. There are two sets of source rock in the Palaeogene and the Upper Palaeozoic. According to the different ways of hydrocarbon supplying, formation models of beried hill type pools can be divided into four types: accumulated in the Palaeozoic with a Cenozoic origin, generated and accumulated in the Palaeozoic, accumulated in the Palaeozoic with a multisource origin, and accumulated in the Mesonic with a multisource origin. Buried hills can be found in a large scope, and better oil and gas shows have been acquired in all kinds of burried hills through many years exploration in the past, which shows a good prospect in explorating buried hill type pools in Dongpu sag. However, up to now any great discovery has not been achieved. The authors hold that the reason why so far the buried hill reservoirs have not been discovered is that there is no a complete set of drilling engineering technologies, except for geological conditions.