鄂尔多斯盆地南部三叠系延长组泥岩压实特征
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摘要
为了明确鄂尔多斯盆地南部三叠系延长组泥岩压实特征,明确泥岩压实效应,本文通过对大量录井、测井数据的统计和分析,对盆地南部三叠系延长组泥岩压实特征进行了详细研究。研究认为,泥岩压实总体上具有平面上分区、纵向上分段的特征。纵向上,长6及其以上地层为正常压实段,富县地区欠压实发育在长7油层组及长9油层组泥岩地层内,其中长7油层组欠压实程度最大,长9油层组次之,长8油层组处于过渡段;而旬邑及黄陵地区欠压实主要发育在长7油层组内。平面上,富县地区泥岩压实曲线最平缓,旬邑地区次之,黄陵地区泥岩压实曲线最为陡倾。从西向东,欠压实顶界深度由深到浅,欠压实的程度逐渐变小。以上成果认识,对后续地层剥蚀厚度估算、孔隙流体压力计算、反演盆地演化分析等奠定了一定的理论基础。
In order to find out characteristics of mudstone compaction of Yanchang formation in the southern Ordos basin,clarity the effect of mudstone pressure,based on the statistics and analysis of a large number of logging data,a detailed study on the characteristics of mudstone compaction Yanchang formation of the Triassic in the southern of the basin.The results showed that the mudstone compaction have the characteristics of north-south difference and longitudinal subsection.Longitudinal,Chang-6 reservoir group and its above strata normal compaction,undercompacted strata develop in Chang-7 reservoir group and Chang-9 reservoir group in Fuxian region,the degree of compaction is the largest in Chang-7 reservoir group,and Chang-9 reservoir group is secondary,Chang-8 reservoir group is in the transition section.Undercompacted strata mainly develop in Chang-7 reservoir group in Xunyi and Huangling area.On the plane,the mudstone compaction curve is the gentlest in Fuxian area,and Xunyi area is secondary,and the mudstone compaction curve is steepest in Huangling area.And from the west to the east,the depth of the undercompacted roof is gradually reduced from deep to shallow,and the degree of underpressure is gradually becoming smaller.Based on the above results,the theoretical foundation is established for the calculation of the subsequent strata denudation thickness,the calculation of pore fluid pressure and the evolution analysis of the inversion basin.
In order to find out characteristics of mudstone compaction of Yanchang formation in the southern Ordos basin,clarity the effect of mudstone pressure,based on the statistics and analysis of a large number of logging data,a detailed study on the characteristics of mudstone compaction Yanchang formation of the Triassic in the southern of the basin.The results showed that the mudstone compaction have the characteristics of north-south difference and longitudinal subsection.Longitudinal,Chang-6 reservoir group and its above strata normal compaction,undercompacted strata develop in Chang-7 reservoir group and Chang-9 reservoir group in Fuxian region,the degree of compaction is the largest in Chang-7 reservoir group,and Chang-9 reservoir group is secondary,Chang-8 reservoir group is in the transition section.Undercompacted strata mainly develop in Chang-7 reservoir group in Xunyi and Huangling area.On the plane,the mudstone compaction curve is the gentlest in Fuxian area,and Xunyi area is secondary,and the mudstone compaction curve is steepest in Huangling area.And from the west to the east,the depth of the undercompacted roof is gradually reduced from deep to shallow,and the degree of underpressure is gradually becoming smaller.Based on the above results,the theoretical foundation is established for the calculation of the subsequent strata denudation thickness,the calculation of pore fluid pressure and the evolution analysis of the inversion basin.
引文
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[16]陈瑞银,罗晓容,陈占坤,等.鄂尔多斯盆地埋藏演化史恢复[J].石油学报,2006(2):43-47.
[17]刘震,孙迪,李潍莲,等.沉积盆地地层孔隙动力学研究进展[J].石油学报,2016,37(10):1193-1215.
[18]陈荷立,罗晓容.泥岩压实曲线研究与油气运移条件分析[J].石油与天然气地质,1987(3):233-242.
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[20]李超,张立宽,罗晓容,等.泥岩压实研究中有机质导致声波时差异常的定量校正方法[J].中国石油大学学报(自然科学版),2016,40(3):77-87.
[21]刘震,武耀辉.泥岩压实程度与热成熟度关系分析[J].地质论评,1997(3):290-296.
[2]王宝萍,崔维兰,张凤奇,等.鄂尔多斯盆地东南部富县-黄龙地区长8油层组勘探潜力分析[J].非常规油气,2015,2(3):27-33.
[3]梁吉学,常象春,尹伟.镇泾地区延长组流体过剩压力分布特征及其与油气成藏的关系[J].油气地质与采收率,2017(4):1-6.
[4]赵习森,郭峰,石立华,等.湖相细粒沉积及其页岩气意义:以下寺湾柳洛峪区块长7油页岩为例[J].非常规油气,2015,2(5):1-6.
[5]李兴文,李仲东,过敏,等.鄂尔多斯麻黄山西区中生界过剩压力与油气关系[J].石油勘探与开发,2011,38(3):294-298.
[6]姜培海,张政,唐衔,等.非常规油气聚集主控因素及油气富集综合分析[J].非常规油气,2017,4(3):110-118.
[7]姚泾利,徐丽,邢蓝田,等.鄂尔多斯盆地延长组长7和长8油层组流体过剩压力特征与油气运移研究[J].天然气地球科学,2015,26(12):2219-2226.
[8]高利文,王琳琳,高立军.鄂尔多斯盆地富黄地区长6低阻油层影响因素分析[J].非常规油气,2016,3(1):35-40.
[9]陈荷立,汤锡元.试论泥岩压实作用与油气初次运移[J].石油与天然气地质,1981(2):114-122.
[10]屈红军,蒲仁海,曹金舟,等.鄂尔多斯盆地南部地区长7致密油储层特征[J].非常规油气,2015,2(1):1-9.
[11]翁望飞,王建强,张蓉蓉,等.利用声波测井技术计算地层剥蚀厚度:以鄂尔多斯盆地为例[J].新疆石油地质,2011,32(2):143-146.
[12]王香增,高潮.鄂尔多斯盆地南部长7陆相泥页岩生烃过程研究[J].非常规油气,2014,1(1):2-11.
[13]刘静静,刘震,朱文奇,等.陕北斜坡中部泥岩压实特征分析及长7段泥岩古压力恢复[J].现代地质,2015,29(3):633-643.
[14]刘勇,雷天成,孙冬胜.陕北斜坡延长组泥岩压实特征[J].西安石油学院学报(自然科学版),1996(2):42-45,6.
[15]陈荷立,王震亮.陕甘宁盆地西缘泥岩压实研究[J].石油与天然气地质,1992(3):263-271.
[16]陈瑞银,罗晓容,陈占坤,等.鄂尔多斯盆地埋藏演化史恢复[J].石油学报,2006(2):43-47.
[17]刘震,孙迪,李潍莲,等.沉积盆地地层孔隙动力学研究进展[J].石油学报,2016,37(10):1193-1215.
[18]陈荷立,罗晓容.泥岩压实曲线研究与油气运移条件分析[J].石油与天然气地质,1987(3):233-242.
[19]秦若辙,王忠然.用声波时差资料研究泥岩压实时的岩性影响问题[J].石油实验地质,1989(1):84-90.
[20]李超,张立宽,罗晓容,等.泥岩压实研究中有机质导致声波时差异常的定量校正方法[J].中国石油大学学报(自然科学版),2016,40(3):77-87.
[21]刘震,武耀辉.泥岩压实程度与热成熟度关系分析[J].地质论评,1997(3):290-296.