白豹地区长4+5储层孔隙结构特征
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摘要
根据铸体薄片、扫描电镜和压汞等资料,对白豹地区长4+5储层孔隙结构特征进行了研究。结果表明:白豹地区长4+5储层的岩石类型以长石砂岩和岩屑长石砂岩为主;孔隙类型以残余原生粒间孔为主;渗流通道多为细、微细喉道;排驱压力高,退汞效率低,具有低孔、低渗储层的特征。储层孔喉分选系数与均值系数均较大,储层非均质性较强。综合物性数据与压汞参数将研究区储层的微观孔隙结构划分为4类,其中第Ⅰ、Ⅱ、Ⅲ类为有效储层,第Ⅳ类为无效储层。
In the Chang 4+5 Member of Baibao area, the porous structure was studied on the basis of some data from casting thin- section, SEM, and mercury injection. Results show that(1)this reservoir is mainly composed of feldspathic sandstone and lithic arkose;(2)its porous types are dominated by residually primary intergranular pore;(3)the seepage channels include fine to finer throat;(4)the displacement pressure is high and mercury-ejection efficiency is low;(5)it is characterized by low permeability and porosity, and strong heterogeneity; and(6)the coefficients of porethroat sorting and mean value are big. According to physical property and mercury-injection parameters, the porous structure can be divided into four types at a micro level, among which the I-, II-,and III-type reservoirs are effective ones, and the IV-type reservoir belongs to nonreservoir, respectively.rddrmKHHduBAdlo
In the Chang 4+5 Member of Baibao area, the porous structure was studied on the basis of some data from casting thin- section, SEM, and mercury injection. Results show that(1)this reservoir is mainly composed of feldspathic sandstone and lithic arkose;(2)its porous types are dominated by residually primary intergranular pore;(3)the seepage channels include fine to finer throat;(4)the displacement pressure is high and mercury-ejection efficiency is low;(5)it is characterized by low permeability and porosity, and strong heterogeneity; and(6)the coefficients of porethroat sorting and mean value are big. According to physical property and mercury-injection parameters, the porous structure can be divided into four types at a micro level, among which the I-, II-,and III-type reservoirs are effective ones, and the IV-type reservoir belongs to nonreservoir, respectively.rddrmKHHduBAdlo
引文
[1]罗荣涛,王震亮,赵景辉.鄂尔多斯盆地白豹油田长4+5段油藏影响因素分析[J].天然气勘探与开发,2009,32(1):13-17.
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[3]王晓杰,彭仕宓,赵文光.长庆白豹油田低渗透储层成岩作用及成岩储集相研究[J].沉积与特提斯地质,2010,30(1):44-48.
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[6]刘林玉,王震亮.真实砂岩微观模型实验在白豹地区长4+5砂岩微观非均质性研究中的应用[J].矿物学报,2008,28(1):55-60.
[7]王瑞飞,陈明强,孙卫.鄂尔多斯盆地延长组超低渗透砂岩储层微观孔隙结构特征研究[J].地质论评,2008,54(2):270-276.
[8]李凤杰,王多云,徐旭辉.鄂尔多斯盆地陇东地区三叠系延长组储层特征及影响因素分析[J].石油实验地质,2005,27(4):365-370.
[9]郭德运,郭艳琴,李文厚,等.富县探区上三叠统延长组成岩作用及孔隙结构特征[J].沉积学报,2010,28(2):264-273.
[10]王婧,徐国盛,曹峻锋,等.川中须家河组储层成岩作用及对孔隙演化的影响[J].天然气技术与经济,2011,5(3):7-10.
[11]冉新权,吴胜和,付晶,等.鄂尔多斯盆地陇东地区延长组低渗透储层孔隙结构分类研究[J].地学前缘,2013,20(2):77-85.
[12]罗蛰潭,王允诚.油气储集层的孔隙结构[M].北京:科学出版社,1986:201-205.
[2]鲁洪江,邢正岩,王永诗.压汞和退汞资料在储层评价中的综合应用探讨[J].油气采收率技术,1997,4(2):48-53.
[3]王晓杰,彭仕宓,赵文光.长庆白豹油田低渗透储层成岩作用及成岩储集相研究[J].沉积与特提斯地质,2010,30(1):44-48.
[4]长庆油田石油地质志编写组.中国石油地质志(卷十二)[M].北京:石油工业出版社,1992:62-78,133-148.
[5]聂永生,田景春,夏青松,等.鄂尔多斯)盆地白豹—姬塬地区上三叠统延长组物源分析[J].油气地质与采收率,2004,11(5):4-6.
[6]刘林玉,王震亮.真实砂岩微观模型实验在白豹地区长4+5砂岩微观非均质性研究中的应用[J].矿物学报,2008,28(1):55-60.
[7]王瑞飞,陈明强,孙卫.鄂尔多斯盆地延长组超低渗透砂岩储层微观孔隙结构特征研究[J].地质论评,2008,54(2):270-276.
[8]李凤杰,王多云,徐旭辉.鄂尔多斯盆地陇东地区三叠系延长组储层特征及影响因素分析[J].石油实验地质,2005,27(4):365-370.
[9]郭德运,郭艳琴,李文厚,等.富县探区上三叠统延长组成岩作用及孔隙结构特征[J].沉积学报,2010,28(2):264-273.
[10]王婧,徐国盛,曹峻锋,等.川中须家河组储层成岩作用及对孔隙演化的影响[J].天然气技术与经济,2011,5(3):7-10.
[11]冉新权,吴胜和,付晶,等.鄂尔多斯盆地陇东地区延长组低渗透储层孔隙结构分类研究[J].地学前缘,2013,20(2):77-85.
[12]罗蛰潭,王允诚.油气储集层的孔隙结构[M].北京:科学出版社,1986:201-205.