辽河坳陷大洼地区玄武质火山角砾岩储层成因分析
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摘要
通过岩心描述、薄片分析、古生物鉴定等分析测试手段,采用岩相学与岩石化学联合分析技术,利用岩性组合、古生物化石等综合划分地层结构单元,对辽河坳陷大洼地区玄武质火山角砾岩储层成因机理进行研究,结果表明,玄武质火山角砾岩成因为玄武岩水下喷发,经淬火碎裂后快速堆积形成。储集空间主要为残余角砾间孔,次为气孔、溶蚀孔、裂缝等,为中高孔、中低渗储层;水下喷发环境的确定对原中生界地层划分方案提出了质疑,认为玄武质火山角砾岩地层应归属为新生界沙三段。
By means of core description, thin section analysis, paleontology identification and other analytical and testing methods, combined lithofacies and petrochemistry analysis technology, lithologic combination,paleo-fossils and other comprehensive division of stratigraphic structural units, the genetic mechanism of basaltic volcanic breccia reservoir in Dawa area of Liaohe sag was studied. The results show that the basaltic volcanic breccia is formed rapidly after quenching and cracking because of the underwater eruption of basalt.Reservoir space is mainly composed of residual breccia inter-porosity, followed by pores, dissolution holes,cracks, etc., which are medium-high porosity and low permeability reservoirs. The determination of the underwater eruption environment has raised doubts about the original Mesozoic stratigraphic division scheme,and it is believed that the basaltic volcanic breccia strata should be classified to the tertiary member of the Cenozoic.
By means of core description, thin section analysis, paleontology identification and other analytical and testing methods, combined lithofacies and petrochemistry analysis technology, lithologic combination,paleo-fossils and other comprehensive division of stratigraphic structural units, the genetic mechanism of basaltic volcanic breccia reservoir in Dawa area of Liaohe sag was studied. The results show that the basaltic volcanic breccia is formed rapidly after quenching and cracking because of the underwater eruption of basalt.Reservoir space is mainly composed of residual breccia inter-porosity, followed by pores, dissolution holes,cracks, etc., which are medium-high porosity and low permeability reservoirs. The determination of the underwater eruption environment has raised doubts about the original Mesozoic stratigraphic division scheme,and it is believed that the basaltic volcanic breccia strata should be classified to the tertiary member of the Cenozoic.
引文
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[2]康志勇.辽河坳陷火山岩岩性特征及储层评价[J].中外能源,2012,17(1):51–55.
[3]刘嘉麟,孟凡超,崔岩,等.试论火山岩油气藏成藏机理[J].岩石学报,2010,26(1):1–13.
[4]李明刚,漆家福,童亨茂,等.辽河西部凹陷新生代断裂构造特征与油气成藏[J].石油勘探与开发,2010,37(3):281–288.
[5]谢文彦.辽河探区油气勘探新进展与下步勘探方向[J].中国石油勘探,2005,10(4):1–9.
[6]陈昌.辽河坳陷大洼地区火山岩特征及储层识别[J].石油地质与工程,2017,31(4):36–43.
[7]李晓光,陈振岩.辽河坳陷古近系碎屑岩储层孔隙演化特征探讨[J].古地理学报,2006,8(2):251–258.
[8]马玉龙,牛仲仁.辽河油区勘探与开发[M].北京:石油工业出版社,1997:39–40.
[9]魏喜,宋柏荣,李学万,等.辽河断陷盆地火山岩储层岩石学及地球化学特征[J].特种油气藏,2003,10(1):13–17.
[10]王鹏,罗明高,杜洋,等.北三台地区石炭系火山岩储层控制因素研究[J].特种油气藏,2010,17(3):41–45.
[11]陈欢庆,胡永乐,冉启全,等.松辽盆地徐东地区营城组一段火山岩储层储集空间特征[J].大庆石油地质与开发,2012,31(3):7–12.
[12]王静,国景星,盛世锋,等.商河油田水下喷发火山岩储层特征[J].断块油气田,2008,15(2):40–42.
[13]王岚,李文厚,林潼,等.陆上、水下喷发成因火山岩储层发育特征和成藏控制因素对比分析——以三塘湖盆地石炭系火山岩油藏为例[J].地质科学,2010,45(4):1 088–1 097.
[14]杨申谷.大洼油田中生界火山岩储集层特征[J].新疆石油地质,2004,25(4):382–384.
[15]熊益学,郗爱华,冉启全,等.火山岩原生储集空间成因及其四阶段演化——以准噶尔盆地滴西地区石炭系为例[J].中国地质,2012,39(1):146–153.