低渗透储层不同成岩相微观孔隙结构特征及其测井识别差异性分析:以姬塬油田王盘山长6_1储层为例
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摘要
基于铸体薄片、扫描电镜、岩心照片、恒速压汞等资料,综合考虑物源、黏土矿物类型、孔隙类型、成岩作用等参数将王盘山长61储层划分成6种不同组合类型成岩相,其中优势储集成岩相为高岭石+绿泥石胶结-粒间孔相、高岭石胶结-溶孔+粒间孔相、绿泥石+高岭石胶结-溶孔相等。研究表明:不同类型成岩相的微观孔隙结构特征及测井响应特征不同,各成岩相微观孔喉差异明显,尤其体现在毛管压力曲线和喉道上,喉道半径与渗透率的相关性好于孔隙半径与孔隙度、渗透率的相关性,优势成岩相孔喉半径较均匀、连通性好、渗流能力较强,相同进汞压力条件下进汞饱和度高;利用自然伽马、声波时差、电阻率等测井曲线,归纳了不同成岩相的测井响应特征,建立了各成岩相测井响应识别模板,确定了不同成岩相的测井响应定量判别标准,最终实现储层纵向上成岩相的识别与划分,为低渗透砂岩储层甜点预测提供重要参考。
Based on information from casting thin sections,scanning electron microscopy( SEM),core photos and constant speed mercury pressure analysis,and with the consideration of the material source,clay mineral,pore type and diagenesis,the Chang 61 reservoir of Wangpanshan is divided into six different diagenetic facies.The dominant reservoir facies are kaolinite + chlorite cementation-intergranular pore,kaolinite cementation-dissolved pore + intergranular pore,and chlorite + kaolinite cementation-dissolution pore. This study shows that the microscopic pore structures and logging responses of the different diagenetic facies are various. The variation of micro-pore throat in each diagenetic phase is distinct,especially in the capillary pressure curve and throat. Correlation between the throat radius and permeability is better than that between the pore radius,porosity and permeability. Moreover,the pore throat radius of the dominating diagenetic facies is more uniform,with better connectivity and seepage ability,which keep high mercury saturation under the same pressure of the mercury intake. The logging response characteristics of the different diagenetic facies are summed up by using natural gamma ray,sonic time difference,resistivity and other logging curves. We then established the logging response identification template for each diagenetic facies,and determined the quantitative identification criteria for logging response of the different diagenetic facies. With that,we identified and divided the vertical upper diagenetic facies of the single well,which provide an important reference for the prediction of sweet spot in low permeability sandstone reservoirs.
Based on information from casting thin sections,scanning electron microscopy( SEM),core photos and constant speed mercury pressure analysis,and with the consideration of the material source,clay mineral,pore type and diagenesis,the Chang 61 reservoir of Wangpanshan is divided into six different diagenetic facies.The dominant reservoir facies are kaolinite + chlorite cementation-intergranular pore,kaolinite cementation-dissolved pore + intergranular pore,and chlorite + kaolinite cementation-dissolution pore. This study shows that the microscopic pore structures and logging responses of the different diagenetic facies are various. The variation of micro-pore throat in each diagenetic phase is distinct,especially in the capillary pressure curve and throat. Correlation between the throat radius and permeability is better than that between the pore radius,porosity and permeability. Moreover,the pore throat radius of the dominating diagenetic facies is more uniform,with better connectivity and seepage ability,which keep high mercury saturation under the same pressure of the mercury intake. The logging response characteristics of the different diagenetic facies are summed up by using natural gamma ray,sonic time difference,resistivity and other logging curves. We then established the logging response identification template for each diagenetic facies,and determined the quantitative identification criteria for logging response of the different diagenetic facies. With that,we identified and divided the vertical upper diagenetic facies of the single well,which provide an important reference for the prediction of sweet spot in low permeability sandstone reservoirs.
引文
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[2]陈蒲礼,王烁,王丹,等.恒速压汞法与常规压汞法优越性比较[J].新疆地质,2013,31:139-141.
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[5]张晋言.泥页岩岩相测井识别及评价方法[J].石油天然气学报(原江汉石油学院学报),2013,35(4):96-103.
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[16]葛岩,黄志龙,宋立忠,等.松辽盆地南部长岭断陷登娄库组致密砂岩有利储层控制因素[J].中南大学学报(自然科学版),2012,43(7):2691-2700.
[17]罗静兰,刘小洪,林潼,等.成岩作用与油气侵位对鄂尔多斯盆地延长组砂岩储层物性的影响[J].地质学报,2006,80(5):664-673.
[18]肖开华,冯动军,李秀鹏.川西新场须四段致密砂岩储层微观孔喉与可动流体变化特征[J].石油实验地质,2014,36(1):77-82.
[19]张凯逊,白国平,王权,等.致密砂岩储集层成岩相的测井识别与评价:以冀中坳陷饶阳凹陷古近系沙河街组三段为例[J].古地理学报,2016,18(6):921-938.
[20]石玉江,肖亮,毛志强,等.低渗透砂岩储集层成岩相测井识别方法及其地质意义:以鄂尔多斯盆地姬源地区长8油层组储集层为例[J].石油学报,2011,32(5):820-827.
[21]丁圣,钟思瑛,周方喜,等.高邮凹陷成岩相约束下的低渗透储集层物性参数测井解释模型[J].石油学报,2012,33(6):1012-1017.
[22]赖锦,王贵文,信毅,等.库车坳陷巴什基奇克组致密砂岩气储集层成岩相分析[J].天然气地球科学,2014,25(7):1019-1032.
[23]任大忠,孙卫,魏虎,等.华庆油田长81储层成岩相类型及微观孔隙结构特征[J].现代地质,2014,28(2):379-387.
[2]陈蒲礼,王烁,王丹,等.恒速压汞法与常规压汞法优越性比较[J].新疆地质,2013,31:139-141.
[3]林文姬,汤达祯,徐凤银,等.苏里格气田盒8段成岩相类型及其测井标志[J].石油天然气学报,2010,32(2):271-274.
[4]时卓,张海涛,王永莉.苏里格气田储层成岩相类型及测井识别[J].国外测井技术,2011(4):13-17.
[5]张晋言.泥页岩岩相测井识别及评价方法[J].石油天然气学报(原江汉石油学院学报),2013,35(4):96-103.
[6]楚美娟,郭正权,齐亚林,等,鄂尔多斯盆地延长组长8储层定量化成岩作用及成岩相分析[J].天然气地球科学,2013,24(3):477-484.
[7]任颖,孙卫,张茜,等.低渗透储层不同流动单元可动流体赋存特征及生产动态分析——以鄂尔多斯盆地姬源地区长6段储层为例[J].地质与勘探,2016,52(5):974-984.
[8]师调调,孙卫,何生平,等.华庆地区延长组长6储层不同类型成岩相微观孔隙结构特征及生产动态分析[J].兰州大学学报(自然科学版),2012,48(3):7-13.
[9]任颖,孙卫,明红霞,等.低渗透储层不同成岩相可动流体赋存特征及其影响因素分析——以鄂尔多斯盆地姬源地区长6段储层为例[J].现代地质,2016,30(5):1124-1133.
[10] SY/T5368-2000,中华人民共和国石油天然气行业标准[S].北京:石油工业出版社,2000.
[11] SY/T5477-2003,中华人民共和国石油天然气行业标准[S].北京:石油工业出版社,2000.
[12] SY/T6285-2011,中华人民共和国石油天然气行业标准[S].北京:石油工业出版社,2000.
[13]张凯逊,白国平,王权,等.致密砂岩储集层成岩相的测井识别与评价:以冀中坳陷饶阳凹陷古近系沙河街组三段为例[J].古地理学报,2016,18(6):921-938.
[14]张茜,孙卫,明红霞,等.板桥-合水地区长63储层成岩相孔隙结构特征及优质储层分布[J].沉积学报,2016,34(2):336-345.
[15]任大忠,孙卫,魏虎,等.华庆油田长81砂岩储层成岩相特征[J].地质科技情报,2014,33(2):72-79.
[16]葛岩,黄志龙,宋立忠,等.松辽盆地南部长岭断陷登娄库组致密砂岩有利储层控制因素[J].中南大学学报(自然科学版),2012,43(7):2691-2700.
[17]罗静兰,刘小洪,林潼,等.成岩作用与油气侵位对鄂尔多斯盆地延长组砂岩储层物性的影响[J].地质学报,2006,80(5):664-673.
[18]肖开华,冯动军,李秀鹏.川西新场须四段致密砂岩储层微观孔喉与可动流体变化特征[J].石油实验地质,2014,36(1):77-82.
[19]张凯逊,白国平,王权,等.致密砂岩储集层成岩相的测井识别与评价:以冀中坳陷饶阳凹陷古近系沙河街组三段为例[J].古地理学报,2016,18(6):921-938.
[20]石玉江,肖亮,毛志强,等.低渗透砂岩储集层成岩相测井识别方法及其地质意义:以鄂尔多斯盆地姬源地区长8油层组储集层为例[J].石油学报,2011,32(5):820-827.
[21]丁圣,钟思瑛,周方喜,等.高邮凹陷成岩相约束下的低渗透储集层物性参数测井解释模型[J].石油学报,2012,33(6):1012-1017.
[22]赖锦,王贵文,信毅,等.库车坳陷巴什基奇克组致密砂岩气储集层成岩相分析[J].天然气地球科学,2014,25(7):1019-1032.
[23]任大忠,孙卫,魏虎,等.华庆油田长81储层成岩相类型及微观孔隙结构特征[J].现代地质,2014,28(2):379-387.