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莺歌海盆地特有的地质特征使泥底辟构造带广泛形成具有特色的油气藏。由气田成因上看，气藏类型主要是穹隆背斜控制的构造气藏及受断层和岩性控制的岩性构造气藏；从气田规模上看，大、中、小型气男均有，在窨的展布表现为平面上成群、成带分布，纵向上常压、浅埋藏中形成多个气层的叠合，泥底辟构造事有其独特的天然气成藏条件：雄厚的生烃物质基础，纵向上多套生、储、盖组合配置良好，泥底辟的发育和演化为气藏的形成提供了圈、运

Form rion or r S llow G Fi ld in r MSd Di pir SrrScrSr B lr in Yingg i B in nd T ir Explor rion & D v lopm nr Por nri l

??The oil and gas reservoirs with distinctive features were widely formed in the mud diapir structure belt because of the special geological conditions in Yinggehai Basin.The types of the reservoirs are mainly the structural reservoirs controlled by dome or anticline and the lithologic structural reservoirs controlled by fault and sand body.There are large,medium and small sized gas fields.The fields are distributed in groups and belts on plane and the reservoirs are superposed with each other in vertical,being of a shallow burial and normal pressure.The mud diapir structure belt has distinctive conditions of gas reservoir formation:there are abundant hydrocarbon generation materials and a good disposition of source reservoir seal assemblage in vertical;and the growth and evolution of the mud diapir structures provide the necessary conditions of the trap,migration,accumulation and preservation,etc.,for gas reservoir formation.When the large sized gas field found is independently developed and the medium and small sized gas fields distributed in groups and belts are unitedly developed,a quite good economic benefit will be obtained.Therefore the mud diapir structure belt is one of the most potential areas for exploration and development in Ying Qiong giant gas area undoubtedly.