济阳坳陷渤南洼陷页岩油气形成条件研究
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摘要
通过大量地震、钻井、测井、矿物、地球化学、物性资料分析,认为济阳坳陷渤南洼陷古近系沙一段、沙三下和沙四上亚段页岩分布面积广,有机质丰度高,有机质类型以Ⅰ—Ⅱ型为主,有机质成熟度分布范围宽,具备形成大量页岩油气的物质基础,三套泥页岩全岩矿物组成中粘土矿物含量低,脆性矿物含量高,以碳酸盐含量为主,利于页岩油气的开采。页岩中压力系数高,各类微孔隙、微裂缝发育,从而容易形成网状的油气储存体系,利于页岩油气的保存。含油、水饱和度分析资料显示,渤南洼陷沙三下亚段12上—13上层组页岩中具有较高的单位岩石含油气量,是页岩油气勘探的有利层段,其中的纹层状泥质灰岩是最有利的岩石类型,具有较好的页岩油气勘探前景。
Through abundant data of seism,drilling,logging,mineral,geochemistry and physical properties,it is concluded that the shale of Paleogene Es1,Lower Es3 and Upper Es4 in Bonan sub-sag,Jiyang Depression is characterized by wide distribution and high abundance,better types(mainly with type I and II) and wide maturity range of organic matter,with a material basis for the formation of shale oil and gas in a large scale.Meanwhile,the low content of clay mineral and high content of brittle mineral(mainly with carbonate) in the 3 sets of shale are favorable for the exploitation of shale oil and gas.In addition,the high pressure coefficient and the development of different micro-pores and micro-cracks in the shale are also favorable for the preservation of shale oil and gas,because the reticular storage system is easy to form under this condition.According to the oil and water saturation data,the upper of No.12 layer to upper of No.13 layer in the Lower Es3 formation are the favorable layers for shale oil and gas exploration in Bonan sub-sag because of their high oil and gas content in unit rock.Especially,as the most favorable rock type,the lamiated argillaceous limestone could be effectively explored.
Through abundant data of seism,drilling,logging,mineral,geochemistry and physical properties,it is concluded that the shale of Paleogene Es1,Lower Es3 and Upper Es4 in Bonan sub-sag,Jiyang Depression is characterized by wide distribution and high abundance,better types(mainly with type I and II) and wide maturity range of organic matter,with a material basis for the formation of shale oil and gas in a large scale.Meanwhile,the low content of clay mineral and high content of brittle mineral(mainly with carbonate) in the 3 sets of shale are favorable for the exploitation of shale oil and gas.In addition,the high pressure coefficient and the development of different micro-pores and micro-cracks in the shale are also favorable for the preservation of shale oil and gas,because the reticular storage system is easy to form under this condition.According to the oil and water saturation data,the upper of No.12 layer to upper of No.13 layer in the Lower Es3 formation are the favorable layers for shale oil and gas exploration in Bonan sub-sag because of their high oil and gas content in unit rock.Especially,as the most favorable rock type,the lamiated argillaceous limestone could be effectively explored.
引文
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[7]郭瑞超,李延钧,王廷栋,等.胜利油田渤南洼陷古近系油气源与成藏特征[J].新疆石油地质,2009,30(6):674-676.
[8]秦延才,徐福刚,赵翠霞,等.渤南油田沙三段含油体系研究[J].油气地质与采收率,2002,9(3):89-94.
[9]张枝焕,曾艳涛,张学军,等.渤海湾盆地沾化凹陷渤南洼陷原油地球化学特征及成藏期分析[J].石油实验地质,2006,28(1):54-58.
[10]朱光有,金强,张善文,等.渤南洼陷盐湖—咸水湖沉积组合及其油气聚集[J].矿物学报,2004,24(1):25-29.
[11]R A纳尔逊.天然裂缝性储集层地质分析[M].柳广第,等译.北京:石油工业出版社,1991.
[12]蒋裕强,董大忠,漆麟,等.页岩气储层的基本特征及其评价[J].天然气工业,2010,30(10):7-12.
[13]张雪芬,陆现彩,张林晔,等.页岩气的赋存形式研究及其石油地质意义[J].地球科学进展,2010,25(6):597-602.
[14]张林晔,李政,朱日房,等.济阳坳陷古近系存在页岩气资源的可能性[J].天然气工业,2008,28(12):26-29.
[15]张光亚.南阳凹陷泥岩裂缝油气藏特征及其形成机制初探[J].石油勘探与开发,1993,20(1):18-25.
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