浊积岩的成因识别及沉积模式探讨

GENESIS IDENTIFICATION AND PROBE OF DEPOSITIONAL MODEL OF TURBIDITE

由于辽河盆地东部凹陷深水浊积岩油藏勘探程度较低,应用粒度判别函数及成因图解两种方法分析该套砂岩的沉积类型。应用粒度分析数据,依据设定的判别函数可以对沉积碎屑岩做出初步的沉积环境鉴别,而成因图解方法分析可以反映碎屑岩沉积过程中能量以及流动性的变化规律,二者结合则能较为准确地判断沉积碎屑岩的沉积环境。应用此方法判定了欧利坨子沙三中段厚层砂砾岩沉积为浊流沉积产物,并在此基础上探讨了该套砂岩的沉积模式。

For the less exploration of deep water turbidite reservoir in eastern sag of Liaohe Basin,the sedimentary type of the sand stones is analyzed by using two types of grain size discriminant function and genesis illustration in the article.Grain size analysis data is applied to distinguished the sedimentary environment of holoclastic rock by the discriminant function.The genesis illustration can reflect the change law of energy and flowability of clastic deposits during the sedimentary process.So,the the sedimentary environment of holoclastic rocks can be judged accurately by using the two ways.In this article,the glutenite of Oulituozi oilfield in Shasan middle section is judged as the turbidite deposition by using these methods,and then the depositional model of the sand stone is also discussed.