【摘要】 冀中坳陷石炭—二叠系是渤海湾盆地重要的产气烃源岩,也是华北油田当前主要的天然气勘探区。为了使得本区天然气的勘探取得突破性的进展,本文根据区内已钻井的岩电组合特征、岩心观察结果、沉积旋回、古生物特征及分析化验资料,并结合地震剖面解释成果,对区内石炭—二叠系的沉积体系、及沉积古环境进行了分析研究,指出了该区沉积体系发育有滨海潮坪-沼泽相、河控三角洲相和河流相三大沉积体系,其沉积环境可归纳出缓慢沉降的陆表海沉积环境、缓慢抬升的海陆过渡沉积环境和快速抬升的河流沉积环境3种类型。更多还原

【Abstract】 Carboniferous-Permian strata in Jizhong depression constitute an important gas hydrocarbon source rock in Bohai Gulf Basin,and also serve as an main natural gas exploration area currently in the North China Oilfield.In order to achieve a breakthrough of gas exploration in the study area,the authors studied Carboniferous-Permian depositional systems and depositional paleoenvironment,on the basis of the lithologicelectric logging features,characteristics of sedimentary cycles,paleontological features,core observations and analytical and test data of drill holes,in combination with results of seismic interpretation.It is pointed out that the study area has developed three types of sedimentary systems: tidal flat-swamps,river deltas and river dominated system.The depositional environments can be classified into three types : the epicontinental sedimentary environment of slow subsidence,the paralic depositional environment of slow uplift and the fluvial environment of rapid uplift.更多还原