论文部分内容阅读
在岩心观察基础上,利用取心井的粒度分析资料,结合区域沉积演化史等前人研究成果,对白音查干凹陷锡14块都一段粒度累计概率曲线特征进行了研究。研究认为:该区都一段辫状河三角洲沉积储层的粒度概率曲线包括4种曲线类型。浊流沉积一般表现为“低斜率两段式”和“上拱弧形”;水下分流河道表现为“台阶状多段式”;滩坝表现为“两跳一悬三段式”。随着搬运介质的能力及流态变化,粒度概率曲线在纵向上发生规律性演变。
On the basis of core observation, the particle size cumulative probability curve of a section of tin 14 in Baiyinchagan depression was studied based on the data of grain size analysis of coring well and the previous research results of regional sedimentary evolution. The study shows that the particle size probability curve of a braided river delta sedimentary reservoir in this area includes four types of curves. Turbidite sediments are generally characterized by “low-slope two-stage” and “upper arc”; underwater distributary channels behave as “stepped multi-stage”; “ Three-stage ”. With the ability of handling media and the change of fluid regime, the probability curve of granularity changes regularly in the vertical direction.