伊通盆地岔路河断陷双阳组沉积相研究

伊通盆地岔路河断陷双阳组处于断陷湖盆发展阶段,边界控盆断层开始活动,基底形成一系列正断层.由于断陷影响,砂体厚度和分布横向变化快,具典型的“源近流短”沉积特征.通过对取心井的岩心资料以及测井、录井等资料,并参考研究区沉积体系背景,研究表明双阳组主要发育扇三角洲、近岸水下扇、滑塌扇和湖泊沉积四类大相,并可细分为扇三角洲平原、扇三角洲前缘、前扇三角洲、近岸水下扇扇根、扇中、扇端、滑塌扇扇中、外扇以及滨浅湖、半深湖10类亚相.

Study on Yitong basin Chaluhe fault depression Shuangyang formation sedimentary facies

Shuangyang formation of Chaluhe fault depression of the Yitong basin is on the de- velopment stage of faulted basin with boundary basin - controlling fault activity beginning and forming a series of normal fault in the basement. As the affection of the fault depression, the thickness and distribution of sand body change fast in the horizontal with a typical ＂source close and current short＂ sedimentary characteristics. In this paper, through the study of core data of coring wells, logging data, mud logging and the deposition system background of the study area, the results showed that the Shuangyang formation develops mainly fan delta, nearshore subaqueous fan, slump fan and lake sedimentary. Sedimentary facies can be fur- ther divided into the fan delta plain, fan - delta front, front fan delta, nearshore subaqueous fan fan root, middle fan, fan end, slump fan fan, outer fan and shallow lake, semi - deep lake.