镇原-泾川地区长9油层组成岩演化序列研究
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摘要
运用沉积学理论,通过镜下观察和岩矿分析,研究镇原-泾川地区长9油层组的岩石学特征及成岩作用类型并建立成岩演化序列。研究表明长9油层组主要发育细、中粒的岩屑砂岩、长石岩屑砂岩,其成分成熟度较低,但结构成熟度较高;填隙物以胶结物为主,主要为碳酸盐胶结物,其次为硅质胶结物,杂基含量较少,主要为黏土杂基和灰泥杂基。通过显微镜鉴定开展储层成岩作用研究,主要的成岩作用包括压实作用、胶结和自生矿物的形成作用、溶蚀作用、交代和重结晶作用。分析了成岩作用对储层的改造作用,进一步总结并建立了研究区的4种成岩作用演化序列,为研究区该油层组下一步的油气勘探和开发提供重要的理论基础。
Sedimentology theory,research petrological characteristics,diagenesis types and establish its diagenetic evolutionary sequences about Chang 9 oil-bearing formation in Zhenyan-Jingchuan area by microscopic observation and analysis of rock and mineral are used. Research shows that Chang 9 oil-bearing formation mainly developed fine,medium lithic sandstone and feldspar lithic sandstone,its componential maturity is low,but have higher structural maturity. Interstitial material mainly base on cement that is mainly carbonate cement,followed by siliceous cement,lower content of matrix,matrix is mainly clay and lime mudstone. Carry out diagenesis research by microscopic identification,the main diagenesis includes compaction,cementation and the formation of authigenic minerals,dissolution,account and recrystallization. Analyse that diagenesis transform the reservoir,further summarize and establish four diagenetic evolutionary sequences,that provide important theoretical basis for next step oil-gas exploration and development about this oil-bearing formation in research area.
Sedimentology theory,research petrological characteristics,diagenesis types and establish its diagenetic evolutionary sequences about Chang 9 oil-bearing formation in Zhenyan-Jingchuan area by microscopic observation and analysis of rock and mineral are used. Research shows that Chang 9 oil-bearing formation mainly developed fine,medium lithic sandstone and feldspar lithic sandstone,its componential maturity is low,but have higher structural maturity. Interstitial material mainly base on cement that is mainly carbonate cement,followed by siliceous cement,lower content of matrix,matrix is mainly clay and lime mudstone. Carry out diagenesis research by microscopic identification,the main diagenesis includes compaction,cementation and the formation of authigenic minerals,dissolution,account and recrystallization. Analyse that diagenesis transform the reservoir,further summarize and establish four diagenetic evolutionary sequences,that provide important theoretical basis for next step oil-gas exploration and development about this oil-bearing formation in research area.
引文
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11 赵俊兴,李凤杰,申晓莉,等.鄂尔多斯盆地南部长6和长7油层浊流事件的沉积特征及发育模式.石油学报,2008;29(3):389 —394
2 王居峰,赵文智,郭彦如,等.鄂尔多斯盆地三叠系延长组石油资源现状与勘探潜力分析.现代地质,2010;24(5):957—964
3 周进高,姚根顺,邓红婴,等.鄂尔多斯盆地延长组长9油层组勘探潜力分析.石油勘探与开发,2008;35(3):289—293
4 杨华,付金华,喻建.陕北地区大型三角洲油藏富集规律及勘探技术应用.石油学报,2003;24(3):6—10
5 赵文智,王新民,郭彦如,等.鄂尔多斯盆地西部晚三叠世原型盆地恢复及其改造演化.石油勘探与开发,2006;33(1):6—13
6 张哨楠,胡江柰,沙文武,等.鄂尔多斯盆地南部镇泾地区延长组的沉积特征.矿物岩石,2000;20(4):25—30
7 陈小梅,温爱琴,李仲东.鄂尔多斯盆地南部镇泾地区中生界油气成藏规律研究.石油地质与工程,2009;23(5):12—15
8 张哨楠,丁晓琪.鄂尔多斯盆地南部延长组致密砂岩储层特征及其成因.成都理工大学学报(自然科学版),2010;37(4):386 —345
9 曾允孚,夏文杰.沉积岩石学.北京:地质出版社,1986
10 杨华,刘显阳,张才利,等.鄂尔多斯盆地三叠系延长组低渗透岩性油藏主控因素及其分布规律.岩性油气藏,2007;19(3):1 —6
11 赵俊兴,李凤杰,申晓莉,等.鄂尔多斯盆地南部长6和长7油层浊流事件的沉积特征及发育模式.石油学报,2008;29(3):389 —394