梨树断陷西丁家地区沙河子组—营城组沉积体系及演化过程研究
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摘要
根据岩心、测录井、地震以及分析化验资料,运用沉积学原理和方法,对西丁家地区沙河子组—营城组时期沉积相和沉积体系进行综合研究。研究表明该区域在早白垩世主要发育湖泊、辫状河三角洲相等四大类沉积相及其亚相和微相。结合研究区"西断东超"型箕状断陷的构造演化特征,在沉积相认识的基础上组合出两大类沉积体系:从沙河子组沉积期至营城组沉积期,北部斜坡带由扇三角洲—水下扇沉积体系演化为辫状河三角洲—湖泊沉积体系;西部断阶带主要发育扇三角洲—水下扇沉积体系。
According to the core,test logging,seismic testing and analysis of data,by using sedimentary principles and methods,the depositional facies and depositional systems of Shahezi-Yingcheng Formation in Xidingjia region are studied synthetically.The research shows that there are four main types of developed sedimentary facies,sedimentary microfacies and subfacies in this area including lake,braided river delta etc during the early Cretaceous period.By analyzing structural evolution feature of the fault depression which is "breaking east overlapping West",and combining the understanding of sedimentary facies,two types of depositional systems are summarized.One is from Shahezi to Yingcheng formation deposition period,it is fan delta-submarine fan depositional system evolved into braided river delta-lake system in northern slope.The other is that fan delta-submarine fan depositional systems is mainly developed in west fault zone.
According to the core,test logging,seismic testing and analysis of data,by using sedimentary principles and methods,the depositional facies and depositional systems of Shahezi-Yingcheng Formation in Xidingjia region are studied synthetically.The research shows that there are four main types of developed sedimentary facies,sedimentary microfacies and subfacies in this area including lake,braided river delta etc during the early Cretaceous period.By analyzing structural evolution feature of the fault depression which is "breaking east overlapping West",and combining the understanding of sedimentary facies,two types of depositional systems are summarized.One is from Shahezi to Yingcheng formation deposition period,it is fan delta-submarine fan depositional system evolved into braided river delta-lake system in northern slope.The other is that fan delta-submarine fan depositional systems is mainly developed in west fault zone.
引文
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[3]王果寿,陈振林,吴金才.松辽盆地南部下白至统地震相及沉积体系[J].江汉石油学院学报,1995,17(4):12-17.
[4]董福湘,赵冰仪,王志华,等.松南十屋断陷扇三角洲和辫状河三角洲沉积体系特征[J].长春工程学院学报:自然科学版,2009,10(2):49-52.
[5]何兴华.松辽盆地南部及其深层油气系统形成演化与勘探潜力分析[D].吉林:吉林大学,2005.
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[7]周荔青.中国陆相含油气盆地斜坡区大中型岩性型油气田形成条件[J].石油与天然气地质,2003,24(4):362-366.
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