渤海C地区中深层滩相储层特征与控制因素MID-DEEP SHOAL RESERVOIR CHARACTERISTICS AND THEIR CONTROLLING FACTORS IN BOHAI AREA C
许聘,官大勇
XU Pin,GUAN Dayong
摘要(Abstract)：
渤海C地区沙河街组一段湖泊滩相碳酸盐岩及云质碎屑岩勘探均有发现,依据钻井、岩心、薄片观察、元素分析等资料,对储层的类型、特征及控制因素进行了研究。结果表明:沙河街组一段滩相储层主要为生屑滩生屑云岩、砾屑滩云质砾岩,整体属中孔、低渗储层,物性明显受控于不同滩相沉积类型;碳酸盐岩基底及湖平面变化控制了不同滩相储层的发育,白云石化、有机酸溶解作用为原生孔隙的保存及次生孔隙的发育提供了有利条件,构造活动产生的裂缝进一步改善了各类型储层的储集性能;准同生成因及浅埋藏成因的白云石化是优质生屑云岩储层形成的关键,云质砾岩虽裂缝相对发育,但在富含碳酸根的地层水重力下渗过程中白云石和方解石沉淀,多数裂缝被充填,胶结程度相对较高;生屑云岩储层质量优于云质砾岩,可作为下步该区块勘探与开发的有利目标。
Lake shoal facies carbonate rocks and dolomitic clastic rocks were discovered in the exploration of Member-1 of Shahejie Formation in Bohai Area C,with the help of the drilling,cores,thin section observation,element analyses and so on,the reservoir type,feature and controlling factors were studied. The results show that this member of the reservoir was mainly composed of the bioclastic-shoal bioclastic dolostone and gravel-beach dolomitic conglomerate,in a whole,the reservoirs belong to the middle-porosity and low-permeability ones,the physical properties are obviously controlled by different shoal facieses of sedimentary types; the carbonate basement and lake level change controls the development of different shoals of the reservoir,the dolomitization and organic acid dissolution have provided the favorable conditions for the preservation of the primary pores and the development of the secondary pores,the fractures caused by the tectonic activities can further improve the various types of the reservoir accumulating properties; the penecontemporaneous dolomitization and shallow burial one are the keys to the accumulation of the high-quality bioclastic-dolostone reservoirs,although the fractures of the dolomitic conglomerate are relatively well-developed,the dolomite and calcite are precipitated in the infiltration process of the formation waterwith rich HCO2-3,many factures are infilled and the cementation degree is relatively higher; the quality of the bioclastic dolostone reservoir is higher than that of the dolomitic conglomerate,so it can be regarded as the favorable target of the further exploration and development in the area.
关键词(KeyWords)：
滩相;生屑云岩;云质砾岩;储层特征;沙河街组;渤海
shoal facies;bioclastic dolostone/dolomite/dolomitite;dolomitic conglomerate;reservoir characteristic;Shahejie Formation;Bohai
基金项目(Foundation): “十三五”国家科技重大专项“中国近海富烃凹陷优选与有利勘探方向预测”(2016ZX05024-002)
作者(Author):
许聘,官大勇
XU Pin,GUAN Dayong
DOI: 10.19597/j.issn.1000-3754.201711012
参考文献(References)：
- [1]孙远实,赵振宇,郭彦如,等.鄂尔多斯盆地西缘沉积环境与储层特征[J].大庆石油地质与开发,2015,34(6):34-38.
- [2]冯伟明,刘建清,谢渊,等.上扬子区龙王庙期碳酸盐岩台地模式及油气勘探[J].特种油气藏,2015,22(1):61-65.
- [3]刘泠杉,胡明毅,高达,等.四川磨溪—高石梯地区龙王庙组层序划分及储层预测[J].大庆石油地质与开发,2016,35(5):42-47.
- [4]熊金玉,李思田,唐玄,等.湖相碳酸盐岩致密储层有机质赋存状态与孔隙演化微观机理[J].石油与天然气地质,2015,36(5):756-765.
- [5]杨生超,邱隆伟,刘魁元,等.邵家洼陷沙四段湖相碳酸盐岩岩性测井解释模型[J].新疆石油地质,2015,36(6):708-713.
- [6]杨有星,金振奎,白武厚,等.黄骅坳陷歧北斜坡区薄层湖相碳酸盐岩沉积相模式及演化特征[J].吉林大学学报(地球科学版),2013,43(5):1330-1340.
- [7]袁剑英,黄成刚,夏青松,等.咸化湖盆碳酸盐岩储层特征及孔隙形成机理:以柴西地区始新统下干柴沟组为例[J].地质论评,2016,62(1):111-126.
- [8]宋国奇,王延章,路达,等.山东东营凹陷南坡地区沙四段纯下亚段湖相碳酸盐岩滩坝发育的控制因素探讨[J].古地理学报,2012,14(5):565-570.
- [9]宋章强,陈延芳,刘志刚,等.渤海海域沙一、二时期碳酸盐岩沉积特征及主控因素分析[J].沉积与特提斯地质,2013,33(1):5-10.
- [10]王海更,张风义,刘建华,等.曹妃甸2-1油田生屑云岩储层特征及主控因素[J].复杂油气藏,2014,7(2):13-15.
- [11]陈树光,任建业,辛云路,等.渤海湾沙北地区盆地结构构造及其演化分析[J].大地构造与成矿学,2015,39,(5):816-827.
- [12]李燕,金振奎,杨有星,等.歧口凹陷沙一下亚段湖相碳酸盐岩储层质量差异机理[J].天然气地球科学,2014,25(2):201-211.
- [13]刘江涛,邓大伟,廖东良,等.沾化凹陷沙四段上亚段滩坝沉积特征及其主控因素[J].油气地质与采收率,2015,22(1):42-46.
- [14]邵红梅,冯子辉,王成,等.塔里木盆地古城地区下古生界白云岩储层类型及成因[J].大庆石油地质与开发,2014,33(5):111-116.
- [15]付广,郭玉超,董亚南,等.南堡凹陷油气成藏的有利地质条件[J].油气地质与采收率,2013,20(3):1-4.