Abstract: Recently，studies of the controlling influence of tectonics on deposition become one of the hot topics pursued in the international geological and hydrocarbon exploration research area. However，researches of tectonic controlling on the reservoir are relatively scarce. Based on the analyses of tectonics，sedimentology and reservoir in the Chezhen Sag，the depositional filling and reservoir development characteristics of different structural styles were discussed. Firstly，structural styles have important influence on the depositional filling types and characteristics. In the area where plane faults were developed，only the nearshore subaqueous fans and a few sliding turbidite fans were deposited. The sublacustirne fans were widely developed at the toe part of the listric faults，while some nearshore subaqueous fans were developed in the vicinity of the toe part of the boundary fault. In the area where slope-flat style faults and faulted ladder were developed and controlled by the secondary faults，onshore and subaqueous deposits were usually developed together with facies such as alluvial fan，fan delta，nearshore subaqueous fan and sublacustrine fan. Secondly，the structural styles play an important role in influencing the vertical accumulation pattern，the scale and architecture of sandstone conglomerates which leads to the final control on the reservoir quality. Integrated studies show that the areas with the development of slope-flat style and faulted ladder style faults host various sedimentary facies and are the most favorable areas for reservoir development. The areas with the development of the listric style faults host thinly bedded sandstone conglomerate of sublacustrine fan facies and are the secondary favorable ones. The areas with the development of the plane style faults host a narrow sandstone conglomerate distribution belt and a thick individual layers which contain the poorest quality of reservoir. The study provides the prediction for high quality reservoir developing areas within the lowly to moderately explored rifted basins.

Key words: Bohai Bay Basin, Chezhen Sag, Paleogene, structural style, sandstone conglomerate, deposition, reservoir

摘要： 近年来，构造对沉积的控制作用研究成为当前国际地质和油气勘探研究中的一个热点，但构造对储集层质量影响的研究相对较缺乏。在对车镇凹陷构造、沉积、储集层研究的基础上，讨论了不同构造样式中沉积充填和储集层发育特征。构造样式对沉积充填类型及特征具有重要影响，其中板式构造样式区仅发育近岸水下扇及少量滑塌浊积扇；铲式构造样式区除在边界断裂根部附近发育近岸水下扇外，其前端湖底扇常较发育；断阶式和坡坪式构造样式区受次级断裂控制，陆上与水下沉积常常共生，沉积类型多样，从冲积扇、扇三角洲到近岸水下扇、湖底扇均可发育。构造样式通过影响砂砾岩体的垂向叠置方式、规模和沉积类型及砂体结构，最终影响了其储集层质量。综合研究认为，断阶式和坡坪式构造样式区沉积类型丰富，为有利储集层最发育区；铲式构造样式区湖底扇发育，砂砾岩单层薄，为次级有利区；而板式构造样式区砂砾岩展布窄、单层厚度大，储集层质量最差。该认识为中低勘探程度的含油气断陷盆地中优质储集层发育带的预测提供了思路。

关键词: 渤海湾盆地, 车镇凹陷, 古近系, 构造样式, 砂砾岩, 沉积, 储集层

CLC Number: 

• P512.2