四川盆地西部侏罗系储层控制因素差异性分析
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摘要
通过对岩心及岩屑薄片观察,结合粒度、物性、薄片等分析化验资料,分析了四川盆地西部侏罗系储层差异化控制因素。侏罗系以分流河道砂体和河口坝砂岩为储层,储层物性受控于沉积因素和成岩作用。沉积因素主要通过沉积微相及粒度影响储层物性,由龙门山中段物源控制的粒度较粗的水下分流河道及河口坝长石类砂体物性最佳;成岩作用则控制孔隙演化,沙溪庙组破坏性成岩作用强于蓬莱镇组;沙溪庙组河口坝砂体与蓬莱镇组水下分流河道砂体破坏性成岩作用较弱,溶蚀作用较强,保留了较多的储集空间,为有利的勘探开发目标。
Through the observation of core and cuttings slice, combined with particle sizes, physical properties, thin slice and so on, the controlling factors of reservoir differentiation are analyzed. The Jurassic reservoir consists of distributary channel sand body and mouth bar sandstone, the physical properties of the reservoir are controlled by sedimentation and diagenesis. Deposition mainly affects the physical properties of the reservoir through sedimentary microfacies and grain sizes, the coarse sand distributary channel and estuarine dam have the best physical properties of feldspar sandstone by Longmen mountain provenance body. Diagenesis controls pore evolution, and the destructive diagenesis of Shaximiao formation is stronger than that of Penglaizhen formation. In the sand body of mouth bar from Shaximiao formation and distributary channel sand body of Penglaizhen formation, the destructive diagenesis is weaker while the dissolution of easily dissolved minerals is stronger. After the diagenesis,the reservoir of the sand body of mouth bar from Shaximiao formation and the distributary channel sand body from Penglaizhen formation reserve much reserve space, which is a favorable exploration and development target.
Through the observation of core and cuttings slice, combined with particle sizes, physical properties, thin slice and so on, the controlling factors of reservoir differentiation are analyzed. The Jurassic reservoir consists of distributary channel sand body and mouth bar sandstone, the physical properties of the reservoir are controlled by sedimentation and diagenesis. Deposition mainly affects the physical properties of the reservoir through sedimentary microfacies and grain sizes, the coarse sand distributary channel and estuarine dam have the best physical properties of feldspar sandstone by Longmen mountain provenance body. Diagenesis controls pore evolution, and the destructive diagenesis of Shaximiao formation is stronger than that of Penglaizhen formation. In the sand body of mouth bar from Shaximiao formation and distributary channel sand body of Penglaizhen formation, the destructive diagenesis is weaker while the dissolution of easily dissolved minerals is stronger. After the diagenesis,the reservoir of the sand body of mouth bar from Shaximiao formation and the distributary channel sand body from Penglaizhen formation reserve much reserve space, which is a favorable exploration and development target.
引文
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[18]崔立伟,汤达祯,王炜,等.鄯勒地区西山窑组成岩作用及储层评价[J].天然气地球科学等.2011,22(2):380-386.
[19]张帆,孙卫,王斌,等.鄂尔多斯盆地华庆地区长63储层成岩作用及其对储层物性的影响[J].石油地质与工程,2017,31(1):1-6.
[20]李维岭,姜在兴,倪新锋,等.正里庄地区沙二段储层成岩作用对孔隙演化的影响[J].油气地质与采收率,2015,22(5):52-57.
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[2]王亮国,余福林,邓康龄,等.川西坳陷侏罗系沉积环境[J].油气地质与采收率,2001,8(6):13-16.
[3]杨晓萍,邹才能,陶士振,等.四川盆地上三叠统-侏罗系含油气系统特征及油气富集规律[J].中国石油勘探,2005,10(2):15-22.
[4]叶素娟,李嵘,张世华.川西坳陷中段侏罗系次生气藏地层水化学特征及与油气运聚关系[J].石油实验地质,2014,36(4):487-494,510.
[5]张萍,徐国盛,周连德.川西平落坝构造侏罗系天然气成藏条件及主控因素分析[J].物探化探计算技术.2009,31(3):258-263.
[6]李忠平,冉令波,黎华继,等.窄河道远源致密砂岩气藏断层特征及天然气富集规律[J].天然气工业,2016,36(7):1-7.
[7]唐宇,吕正祥,叶素娟,等.成都凹陷上侏罗统蓬莱镇组天然气运移特征与富集主控因素[J].石油与天然气地质,2013,34(3):281-287.
[8]杨帆,孙准,赵爽.川西坳陷回龙地区沙溪庙组成藏条件及主控因素分析[J].石油实验地质,2011,33(6):569-573.
[9]邓莉.川西坳陷沙溪庙组气藏成藏主控因素探讨[J].断块油气田,2003,10(5):26-28.
[10]王丽英,王琳,张渝鸿,等.川西地区侏罗系沙溪庙组储层特征[J].天然气勘探与开发,2014,37(1):1-4,9.
[11]许艳争.红河油田延11储层特征及主控因素[J].石油地质与工程,2016,30(5):48-55.
[12]王永诗,王勇,朱德顺,等.东营凹陷北部陡坡带砂砾岩优质储层成因[J].中国石油勘探,2016,21(2):28-36.
[13]刘志刚,杜晓峰,王清斌,等.渤海海域旅大21-A构造沙四段储集层特征及控制因素[J].海洋石油,2012,32(2):26-29,89.
[14]李海华,张彦霞,王保华.长岭断陷层碎屑岩成岩作用与次生孔隙[J].大庆石油地质与开发,2010,29(5):29-34.
[15]王延鹏,朱珍玉,任宵宇,等.伊川凹陷上三叠统油气储层特征[J].石油地质与工程,2016,30(4):36-38.
[16]孙红华,李旭平,钟建华,等.辽河西部凹陷南段沙三段致密砂岩储层物性特征及主控因素分析[J].岩性油气藏,2013,25(6):53-61.
[17]叶素娟,李嵘,杨克明,等.川西坳陷叠覆型致密砂岩气区储层特征及定量预测评价[J].石油学报,2015,36(12):1 484-1 494.
[18]崔立伟,汤达祯,王炜,等.鄯勒地区西山窑组成岩作用及储层评价[J].天然气地球科学等.2011,22(2):380-386.
[19]张帆,孙卫,王斌,等.鄂尔多斯盆地华庆地区长63储层成岩作用及其对储层物性的影响[J].石油地质与工程,2017,31(1):1-6.
[20]李维岭,姜在兴,倪新锋,等.正里庄地区沙二段储层成岩作用对孔隙演化的影响[J].油气地质与采收率,2015,22(5):52-57.
[21]BEARD D C,WEYL P K.Influence of texture on porosity and permeability of unconsolidated sand[J].AAPG Bulletin,1973,57(2):349-369.