【摘要】 阿姆河盆地中石油合作区块在中、晚侏罗世沉积时期在台缘斜坡带发育大量的生物礁与巨厚的膏、盐岩沉积,形成了该区重要的储盖组合类型。由于后期受西南吉萨尔山逆冲的影响,膏、盐岩地层发生了形变与塑性流动,影响了盐下礁体的识别。针对台缘斜坡带大量分布的点礁与上覆膏、盐岩变形关系,本文从地震正演模型入手,分析两者的地震响应特征;利用时差厚度方法进行生物礁的识别;探索出古地貌与相干振幅属性相结合的方法预测生物礁储层的分布;利用优选层序格架约束稀疏反演方法,有效地消除膏、盐岩变形对生物礁储层的影响。形成了一套基于膏、盐岩变形下的礁体识别方法,提高了礁体识别精度,发现一批可供钻探的生物礁。更多还原

【Abstract】 In a PetroChina bock of Amu-Darya Basin,lots of reef and extremely thick salt-gypsum sediments were developed in platform-edge slope during the depositional period of Middle Jurassic and Late Jurassic,which forms import types of reservoir-seal assemblages in this area.Affected by the thrusting of southwestern Gissar Mountain,deformation and plastic flow happened to the salt-gypsum sediments,which make the identification of subsalt reef more difficult.To study on the relationship between patch reefs,which massively distribute in the in platform-edge slope,and the overlying deformed salt-gypsum sediments,this paper analyzes their seismic response characteristics starting with seismic forward model,identifies reefs by isochrone method,explores a way to predict the distribution of reef reservoir through the combination of palaeogeomorphology and coherent amplitude attribute,and optimizes sparse inversion with constrains of sequence stratigraphy framework,which effectively eliminates the affection of salt-gypsum formation on reef reservoir.Finally we develop a set of suitable methods for subsalt reef identification,and discover a few reefs as prospects favorable for drilling.更多还原