为明确旋转掀斜斜坡区构造—沉积演化特征及其对岩性油气藏的控制作用,以渤海湾盆地歧口凹陷板桥斜坡区为例,运用地震、测井及岩心薄片等资料,分析了板桥斜坡构造演化特征、不同构造阶段沉积特征及其与岩性油气藏成藏的关系。认为板桥斜坡古近纪经历了“整体沉降—旋转掀斜”2个阶段,古地貌具有“早缓—晚陡”的特征,古构造经历早期单斜—晚期箕状的演化过程。E_(3s3)-E_(3 s_1~x)以构造整体沉降为主,古地貌平缓,沧县隆起物源向整个斜坡区大面积输送,发育大型辫状河三角洲沉积,前缘砂体在现今缓坡区叠置连片;E_(3s_1~z)-E_3 d发生旋转掀斜,斜坡区主体发生构造反转,形成现今箕状格局。板桥斜坡大面积缓坡为岩性圈闭形成提供构造背景,早期古地貌平缓有利于缓坡区优质砂体叠置连片,晚期旋转掀斜有利于上倾尖灭岩性圈闭形成。板桥斜坡中、低缓斜坡区E3sx1三角洲前缘水下分支河道有利砂体叠置连片,储集物性好,与油源断层匹配,是岩性油气藏勘探有利地区。据此,在缓坡区新落实多个岩性圈闭发育带,部署完钻的12口井相继获得高产油气流,圈闭钻探成功率高达85%。 In order to clarify the tectonic-sedimentary evolution characteristics of swirling and slope-swollen zone and its control over lithologic reservoirs, taking the Banqiao slope area in Qikou Sag of Bohai Bay Basin as an example, the seismic, well logging and core thin-sheet data were used to analyze Structural evolution of Banqiao slope structure, sedimentary characteristics in different tectonic stages and its relationship with hydrocarbon accumulation in lithologic reservoirs. It is considered that the Paleogene of Panchiao slope experienced two stages of “whole subsidence - rotation and tilting ”, and the palaeogeomorphology has the characteristics of "early slow - late steep process. E3s3-E3s_1-x are dominated by structural subsidence and the paleogeomorphology is gentle. Cangxian uplift source transported to the entire slope area over a large area, developing large braided river delta deposits. The frontal sand bodies are nowadays Gentle slope area overlaps the contiguous piece; E 3s_1-z -E_3 d rotates and tilts obliquely, the structure of the main body in the slope area reverses and forms the current Kei-like pattern. The large area gentle slope of Banqiao slope provides structural background for the formation of lithologic traps. The early paleogeomorphology is favorable for superimposing contiguous sheets of high-quality sand bodies in gentle slope areas. Late rotation and tilting are favorable for the formation of updip pinch-out lithological traps. In the Banqiao slope, favorable sand bodies are contiguous with the favorable submarine branches of the E3sx1 delta front subduction channel in the low and gentle slope areas, which have good reservoir properties and matching with oil source faults, and are favorable exploration areas for lithologic reservoirs. As a result, a number of lithologic trap development zones were newly implemented in the gentle slope area. High-yield oil and gas flows were successively obtained in 12 wells drilled and completed. The success rate of trapping drilling was as high as 85%.