白音查干凹陷储层成岩作用及其纵向分带特征

白音查干凹陷是一个中生代沉积盆地，成岩作用的类型发育较全，主要发育的有压实及压溶作用、胶结及交代作用、溶蚀作用等。在现今埋深下，埋深在500m左右时已进入早成岩B期，约1000m时进入晚成岩A期，大约2300m左右进入晚成岩B期。以各种成岩作用为依据，可以划分出杂基填集成岩相、强压实戍岩相、强胶结戍岩相以及弱压实、弱胶结戍岩相、溶蚀、溶解成岩相。多种成岩作用综合影响使得储层变化有规律，白音查干凹陷储层在纵向上可以划分为6个相带，其中相带Ⅰ、Ⅲ为浅层较有利储集相带，相带Ⅴ、Ⅵ为深层较有利储集相带，相带Ⅱ、Ⅳ为较差的储集相带。

Reservoir Diagenesis and Its Vertical Zoning of Baiyinchagan Depression

Baiyingchagan depression is a Mesozoic sedimentary basin, whose reservoir burying and diagenesis evolution experienced a long time span. So the types of diagenesis developed well with the main types of compaction and pressure solution, cementation and metasomasis, karsting, etc. When burying depth reaches about 500m, it comes to early diagenesis of B, about 1000m to late diagenesis of A, about 2300m to late diagenesis of B. It can also be divided into various facies according to various diageneses, which affects each other comprehensively and made the reservoir change regularly. So, Baiyinchagan depression can be divided into six belts vertically, among which type I and II are favorable reservoir belts, while V and VI are the second, and II and IV are poor ones.