米氏旋回剥蚀量计算方法在泌阳凹陷的应用  

Calculation of denudation amount with Milankovitch cycle method: a case study in Biyang Sag

作　　者：姚益民[1] 徐旭辉[2] 刘翠荣 谈彩萍[3] 罗家群[4] 朱景修[4] 

机构地区：[1]中国石油化工股份有限公司胜利油田分公司地质科学研究院,山东东营257015 [2]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [3]中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所,江苏无锡214151 [4]中国石油化工股份有限公司河南油田分公司石油勘探开发研究院,河南南阳473132

出　　处：《石油实验地质》2011年第5期460-467,共8页Petroleum Geology & Experiment

基　　金：中国石油化工股份有限公司科学技术研究开发项目(P08060)资助

摘　　要：利用米氏旋回地层学方法对泌阳凹陷古近系与新近系之间区域不整合面的剥蚀量进行了计算。泌阳凹陷古近系\新近系剥蚀量计算可以分为2段:(1)各井各组(段和亚段)选定现有地层的分层和测井曲线数据进入"旋回地层学研究系统"(Version1.0),寻找0.405Ma周期,求最大优势旋回,计算出现有沉积时间;(2)把现有地层沉积时间以外的剥蚀掉的时间,用0.405Ma周期转化为剥蚀厚度。计算结果表明在凹陷的核心地区,仅廖庄组遭到剥蚀,凹陷东南部安棚一带剥蚀量小于100m,向凹陷西、西北以及北部边缘方向逐渐增大,至廖庄组缺失线附近,剥蚀厚度在650m以上。凹陷边缘附近,核桃园组也遭到剥蚀,核桃园组的剥蚀厚度主要介于4.1～666.5m,总剥蚀量在1 000m以上。泌阳凹陷已知油田分布于剥蚀厚度大于200m地区。The denudation thickness of Paleogene—Neogene unconformity in the Biyang Sag has been calculated with the Milankovitch cycle method.The calculation process has been divided into 2 steps.1） Put the strata classification and logging curves of all formations as well as sections and sub-sections into ＂studies system of cyclostratigraphy＂（version 1.0） so as to find the 0.405 Ma period.In this way,the maximum dominant cycle and the sedimentary time for available strata can be calculated.2） Transform the denudation time besides of the above-mentioned sedimentary time for available strata into erosion thickness according to the 0.405 Ma period.It has been concluded that in the center of the sag,only Liaozhuang Formation is denuded.In Anpeng area which locates in the southeast of the sag,the denudation thickness is less than 100 m and increases gradually to the west,northwest and northern margin of the sag,and finally exceeds 650 m around the missing boundary of Liaozhuang Formation.Hetaoyuan Formation is also denuded near to the sag boundary,mainly 4.1-666.5 m thick,and the total denudation thickness is over 1 000 m.The known oilfields in the sag mainly locate in the area with denudation thickness larger than 200 m.

关 键 词：米氏旋回法 E/N的剥蚀量计算 核桃园组 廖庄组 泌阳凹陷 

分 类 号：TE121.3[石油与天然气工程—油气勘探]