西湖凹陷平湖组物源分析
发布时间：2019-05-28 22:33
【摘要】：西湖凹陷平湖组是否存在东侧物源存在争议,东侧物源的确定对油气勘探意义重大。综合利用钻井、地震、分析化验等资料,分析西湖凹陷平湖组沉积物的重矿物ZTR指数、砂岩类型、岩屑组分、砂岩百分含量以及地震相、同沉积构造特征等,发现平湖组沉积物的陆源重矿物ZTR指数及砂岩成分成熟度呈"凹陷两侧低、中间高"的特征,自生重矿物菱铁矿及砂岩百分含量则呈"凹陷两侧高、中间低"分布;由地震反射特征可知,平湖组存在明显的盆地边缘杂乱反射及指示东侧物源存在的前积反射构型;而且平湖组中晚期生长背斜的存在,从构造应力方面进一步印证了平湖组沉积时期东部隆褶带的存在。综合以上研究,认为东部隆褶带在平湖组沉积期就已经隆起并作为西湖凹陷的东侧物源,西湖凹陷中东部深层平湖组具有良好的油气勘探前景。
[Abstract]:Whether there is an east provenance in Pinghu formation in Xihu sag is controversial, and the determination of the east provenance is of great significance to oil and gas exploration. Based on the data of drilling, earthquake and analysis, this paper analyzes the heavy mineral ZTR index, sandstone type, cuttings composition, sandstone percentage, seismic facies and synsedimentary structural characteristics of the sediments of Pinghu formation in Xihu sag. It is found that the ZTR index of terrestrial heavy minerals and the maturity of sandstone components in Pinghu formation are characterized by "low on both sides of the depression and high in the middle", while the percentage content of siderite and sandstone in the authigenic heavy minerals is "high on both sides of the depression and low in the middle". From the seismic reflection characteristics, it can be seen that the Pinghu formation has obvious chaotic reflection at the edge of the basin and the proproduct reflection configuration indicating the existence of the provenance on the east side of the basin. Moreover, the existence of the growth anticlinal in the middle and late Pinghu formation further confirms the existence of the uplift fold belt in the eastern part of the sedimentary period of Pinghu formation from the aspect of tectonic stress. Based on the above studies, it is considered that the eastern uplift fold belt has been uplift in the sedimentary period of Pinghu formation and is used as the eastern source of Xihu sag, and the deep Pinghu formation in the middle and east of Xihu sag has a good prospect of oil and gas exploration.
【作者单位】： 中国石油集团长城钻探工程有限公司解释研究中心;中海石油(中国)有限公司上海分公司;中国石化上海海洋油气分公司研究院;中国石油天然气管道局国际事业部;浙江大学海洋学院;
【分类号】：P618.13
本文编号：2487412
[Abstract]:Whether there is an east provenance in Pinghu formation in Xihu sag is controversial, and the determination of the east provenance is of great significance to oil and gas exploration. Based on the data of drilling, earthquake and analysis, this paper analyzes the heavy mineral ZTR index, sandstone type, cuttings composition, sandstone percentage, seismic facies and synsedimentary structural characteristics of the sediments of Pinghu formation in Xihu sag. It is found that the ZTR index of terrestrial heavy minerals and the maturity of sandstone components in Pinghu formation are characterized by "low on both sides of the depression and high in the middle", while the percentage content of siderite and sandstone in the authigenic heavy minerals is "high on both sides of the depression and low in the middle". From the seismic reflection characteristics, it can be seen that the Pinghu formation has obvious chaotic reflection at the edge of the basin and the proproduct reflection configuration indicating the existence of the provenance on the east side of the basin. Moreover, the existence of the growth anticlinal in the middle and late Pinghu formation further confirms the existence of the uplift fold belt in the eastern part of the sedimentary period of Pinghu formation from the aspect of tectonic stress. Based on the above studies, it is considered that the eastern uplift fold belt has been uplift in the sedimentary period of Pinghu formation and is used as the eastern source of Xihu sag, and the deep Pinghu formation in the middle and east of Xihu sag has a good prospect of oil and gas exploration.
【作者单位】： 中国石油集团长城钻探工程有限公司解释研究中心;中海石油(中国)有限公司上海分公司;中国石化上海海洋油气分公司研究院;中国石油天然气管道局国际事业部;浙江大学海洋学院;
【分类号】：P618.13
【相似文献】
相关期刊论文 前10条
1 刘成鑫;;东海平湖油气田平湖组沉积相研究[J];海洋石油;2010年02期
2 王建平;;西湖凹陷平湖组时代及古环境古气候浅析[J];中国海上油气;1992年04期
3 顾惠荣,贾健谊,吴伟力,陈明;东海平湖油气田下第三系平湖组储层评价[J];海洋石油;2002年02期
4 刘书会;王宝言;刘成鑫;;西湖凹陷平湖地区平湖组沉积相的再认识[J];油气地质与采收率;2009年03期
5 魏恒飞;陈践发;陈晓东;曹冰;郭望;张俊华;;西湖凹陷平湖组滨海型煤系烃源岩发育环境及其控制因素[J];中国地质;2013年02期
6 余朝丰;陈建文;杜远生;张银国;;东海西湖凹陷平湖组层序地层划分[J];海洋地质与第四纪地质;2007年05期
7 魏恒飞;陈践发;郭旺;刘高志;张俊华;陈斐然;;西湖凹陷平湖组层序地层划分和聚煤特征[J];吉林大学学报(地球科学版);2013年03期
8 陈琳琳;东海西湖凹陷平湖组沉积环境演化[J];海洋地质与第四纪地质;1998年04期
9 陈琳琳;东海西湖凹陷平湖组海进潮道砂体成因分析[J];海洋石油;2000年02期
10 李敏;陈永进;姜文斌;;西湖凹陷平湖组岩性油气藏形成条件[J];油气地质与采收率;2012年02期
相关硕士学位论文 前2条
1 谢国梁;西湖凹陷平北地区平湖组聚煤规律[D];中国矿业大学;2014年
2 周洁;东海盆地西湖凹陷始新统平湖组煤系烃源岩地球化学特征[D];浙江大学;2012年
，本文编号：2487412
本文链接：https://www.wllwen.com/kejilunwen/diqiudizhi/2487412.html
