哈得逊油田成藏研究

对哈得逊油田的原油成分、原油和储层沥青族组分碳同位素、储层自生伊利石年龄和包裹体研究,以及该地区沉积和构造历史的研究表明,哈得逊油田发生过两次油气充注,第一次油气充注发生在晚二叠纪,早期原油在油田范围内只是经过,并没有聚集成藏。由于当时储层埋藏较浅,储层成岩作用弱,没有包裹体的形成。晚海西期由于构造抬升,储层中残留的早期原油发生了降解,只保留了一些重质组分。目前油藏中保存下来的原油为喜马拉雅期注入的、由O2 O3源岩形成的原油。

Formation of Hadexun oilfield in Tarim Basin, NW China

Studies on the oil composition,the carbon isotope of group componen t of oil and bitumen from reservoir stone,the age of authigenic illite and incl usions,and the structure and sedimentary history of Tarim basin show that there were two oil charges in Hadexun area.The first one took place in Late Permian,and the oil only passed by and no oil accumulated in that area during this time.There are no inclusions grown in reservoir sandstone because of its shallow de pth and poor diagenesis during the first charge.The residual early oils in the reservoir stone degraded,and only heavy compositions remained because of the la te Hercynian tectonic uplifting.The oil remained in the reservoir at present ca me from the O2 O3 source rock and charged during Himalayan.