冀中廊固凹陷含油气系统

Petroleum Systems of Langgu sag.

渤海湾冀中廊固凹陷具复杂的地质结构和多物源的沉积特点，形成了凹陷内两大含油气系统，其中柳泉中央背斜带探明石油地质储量２５１２×１０＾４ｔ，东部的河西务构造带探明石油地质储量３９０７×１０＾４ｔ。这两个主要的含油气系统受凹陷的形成、发育的地质背景的影响，其含油气系统中也有各自的特点和成藏的规律，成藏的关键时个重要的含油气系统形成的油气分布规律在油气勘探中具有比较重要的作用。

Langgu sag at Jizhong in Bohai Bay is character-ized by complex geologic structure and many materialsources in sediment, formed two petroleum systems,in which 2512 × 10~4 ton and 3907 × 10~4 ton of provedoil reserve have been found in Liuquan central anticli-nal zone and Hexiwu structural zone in the east, re-spectively. Affected by geologic setting of sag form-ing and development, each of the two major petroleumsystems has its own features and the pool-formingregularity. The critical moment of pool-forming is dif-ferent. The assemblies of lower source rock-upper re-servoir rock and source rock-reservoir rock in thesame strata are formed in Liuqugn and Hexiwu struc-tural zones, respectively. The distribution disciplinesof oil and gas of the two major petroleum systems play an important role in petroleum exploration. Theexploration for the third section of Shahejie Formationis generally focused in the central of the sag, while theexploration for the fourth section is focused in the eastof the sag.