欢喜岭油田南部沙三段浊积扇成因分析

Analysis on genesis of turbidite fan of the Third Member
of Shahejie Formation in the South of Huanxiling Oilfield

 龙武1 王伟锋1 程俊生2 冯国良2

Long Wu, Wang Weifeng,Cheng Junsheng,et al .

 1.中国石油大学地球资源与信息学院,山东东营257061曰2.辽河石油勘探局录井公司，辽宁盘锦124010

(Gollege of Geo -Resource and Information,China University of Petroleum, Dongying 257061, China)

 欢喜岭油田位于辽河坳陷西部凹陷南部，沙三时期浊积扇非常发育，通过对研究区大量的
资料分析袁，并结合前人的研究成果、地理位置、古地貌、构造特征等综合因素,认为该区发育2 种类型的浊
积扇：湖底扇和滑塌扇。根据2 种浊积扇体的沉积特征，又将它们分为内扇、中扇、外扇3 个亚相。湖底扇
是中期基准面上升的早期碎屑源区洪泛事件形成的重力流进入深湖区，沿湖盆短轴方向发育的浊积扇；
滑塌扇是短期基准面下降期扇三角洲前缘发生准同生期滑塌在深湖区形成的浊积扇。浊积扇砂体易形
成岩性或构造-岩性油气藏，是油气勘探的重要目标。

The Huanxiling oilfield is situated in south of West depression
of Liaohe Sag. The turbidite fan is developed extraordinary in period
of the third member of Shahejie. Study shows that two kinds of
turbidites fan are developed in this area院sublacustrine fan and
slump fan. Based on the sedimentation characteristics of the two
kinds of turbidite, it can be divided into three subfacies as inner fan,
middle fan and outer fan. The sublacustrine fans of the studied area
are the turbidite fans which gravity flows form from water-flooding
event of debris source zone at the early stage of ascending mediumterm
base level rush in abyss and develop along minor axis of lake
basin袁slump fans of the studied area are the turbidite fans which are
formed by the front edge of fan deltas occurs syndepositional epoch
slump in abyss at the stage of descending short-term base level.The
sand bodies of braided channel of turbidite fan can form lithologic oil
reservoir or structural-lithologic oil reservoir easily and will be the
central target of oil and gas exploration.