苏里格气田苏6井区块盒8段沉积相研究

根据苏里格气田苏6区区域沉积背景，充分应用工区取心井盒₈段岩心观察及分析化验资料，对盒₈段气藏储层岩石学特征、原生的泥岩颜色、粒度特征以及沉积构造等相标志进行了综合分析，确定苏里格气田苏6区块盒8段气藏为辫状河三角洲的沉积环境。在工区内划分出辫状水道、河漫沼泽、水下分支河道和河道间等沉积微相，并指出区块有利的沉积相带为辫状水道和水下分支河道微相，储层砂体的几何形态及分布规律受河道的走向及延伸距离的控制。该成果为苏里格气田苏6区块盒₈段气藏优质储层的预测指出方向，也为气藏滚动勘探开发方案的制定和调整提供了地质依据。

SEDIMENTARY FACIES OF 8TH MEMBER OF SHIHEZI FM IN BLOCK SU 6 IN SULIGE GAS FIELD

According to the regional depositional setting of Block Su 6 in Sulige gas field, facies markers of the gas reservoir in the 8~ th member of Shihezi Fm, such as petrological characteristics, color of original mudstone, grain size and sedimentary structures, are comprehensively analyzed by fully utilizing the available core observation and laboratory test data of the Block. It is believed that the gas reservoir in the 8~ th member of Shihezi Fm in Block Su 6 of Sulige gas field is of braided river delta facies, which is further subdivided into several sedimentary microfacies, including braided river channel, flood swamp, underwater distributary channel and interchannle. The braided river channel and underwater distributary channel microfacies are favorable sedimentary facies belts in the Block and the geometry and distribution of reservoir sandbodies are controlled by the direction and extended distance of channels. It provides a geological basis for reservoir prediction and progressive exploration and development planning and adjustment of the gas reservoir in the 8~ th member of Shihezi Fm in Block Su 6 of Sulige gas field.