【摘要】 坡折带近年来日益受到重视,它明显控制了上覆地层分布、岩性岩相变化和油气藏的分布。通过层序地层法恢复古地貌,在川中-川西过渡带识别大型地貌坡折带,川西地区晚三叠世接受其西部和东部两个方向的物源供给。在大量岩心观察、地震资料和测井资料研究基础上,认为在坡折带控制下,龙泉山断裂带以西须二、须四段发育砂质碎屑流重力流沉积,分析其基本特征和储集性能,最后指出砂质碎屑流储层物性总体优于川西地区南部其它类型砂体,是新型的勘探对象,具有一定的勘探潜力。更多还原

【Abstract】 Large-scale slope break is recognized in the central-west Sichuan transitional belt by means of sequence stratigraphical study. Under the control of the slope break, sandy debris flow and gravity flow deposits were developed in the Second and Fourth Members of the Xujiahe Formation to the west of the Longquanshan fracture zone. The reservoir property is prior to other sand bodies in west Sichuan.更多还原