东濮凹陷古潜山勘探潜力分析

摘要

东濮凹陷古潜山含油层系多,于太古界、下古生界、上古生界和中生界都有含油层系分布，发育下第三系和上古生界两套烃源岩。根据烃源供给方式的差异,可将潜山成藏模式分为新生古储、古生古储、多源古储和多源中储4种类型,其分布范围广,经多年勘探，在各类潜山中都见到较好的油气显示,表明东濮凹陷潜山勘探具有良好前景。但多年勘探未获突破,究其原因,除地质条件外,钻探中系统工程不配套也是制约古潜山油气藏及早发现的重要因素。图3表1参1 (袁先春摘)%Buried hills in Dongpu sag consist of many oil bearing strata, which distribute in the Archaeozoic, 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