对杏树岗油田北部姚二、三段三角洲内前缘水下河道砂体的质疑A DISCUSSION ON SUBAQUEOUS CHANNEL SAND-BODIES IN DELTA INNER FRONT IN Y2,3 MEMBERS IN NORTHERN XING SHUGANG OILFIELD
吴蕾
Wu Lei(Scientific Research Institute of Petroleum Exploration & Development;
摘要(Abstract)：
杏树岗油田北部姚二、三段的一些断续条带状厚砂体过去认为是三角洲内前缘的水下河道砂休，通过对岩心的观察，密井网栅状图和纵剖面图的解剖，作者认为它们是三角洲外前缘的席状砂叠加或较大风暴时期湖浪改造形成的零散水下砂坝，它们的沉积特征表明它们是在波基面之上的浅湖环境由河流带来的碎屑物质在波浪的改造作用下沉积的，沉积速率缓慢。
ABSTRACT
Some discrete thick stripped sandbodies in members Y2,3 (Yaojia Formation) in northern Xingshugang Oilfield were once considered as subaqueous channel sand-bodies in delta inner front. Based on the observation of cores and analysis of the fence diagrams and vertical sections for close well spacing,the author considered that they were sheet sands stacking in outer delta front subaqueous sand bars reworked by the lake wave when bigger storms attacked. The depositional features indicated that they were clastic materials brought by stream into a shallow lacustrine environment above the wave base and reworked by waves then deposited very slowly.
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作者(Authors):
吴蕾
Wu Lei(Scientific Research Institute of Petroleum Exploration & Development;
DOI: 10.19597/j.issn.1000-3754.1987.02.005