超低渗致密储层成岩相特征及其对产能控制作用——以麻黄山西区块长8油组油藏为例
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摘要
通过对鄂尔多斯盆地麻黄山西区块长8油组岩心观察,以及综合运用普通薄片、铸体薄片、扫描电镜以及压汞等分析化验资料,在对储层成岩作用类型和特征研究的基础上,结合孔渗条件,将该区目的层段成岩相划分为四类;再结合各类成岩相电测响应特征,建立成岩相测井识别标准,完成各单井成岩相识别;在此基础上对井间成岩相的空间展布状态进行预测,并对各类成岩相发育规律进行分析、总结。研究表明,麻黄山西区块长8油组储层划分为斑状溶蚀孔隙成岩相、碳酸盐致密胶结成岩相、黏土矿物致密胶结成岩相和致密压实成岩相四种成岩相类型。斑状溶蚀孔隙成岩相主要发育在水下分流河道微相中,物性最好,横向延展性和连通性好;黏土矿物致密胶结成岩相和碳酸盐致密胶结成岩相主要发育在水下分流河道、席状砂、河口坝微相中,物性次之;致密压实成岩相主要发育在分流间湾微相和前三角洲泥微相,物性最差,连片发育,为本区最发育的成岩相类型。体现优质成岩相主要发育在优势沉积微相中,成岩相对孔渗具有控制作用。斑状溶蚀孔隙成岩相碳酸盐致密胶结成岩相中试油日产和单位产能最高,是最有利于油气富集、开采的优势相带,为下一步重点开发的区域;黏土矿物致密胶结成岩相和致密压实成岩相虽然分布范围广,但整体产能较低,分析认为主要由于这两类相带物性较差,在生产开发中应采取酸化、压裂等方式进行储层改造来提高产能。
The study is focuses on the Chang 8 formation in west area of Mahuangshan,Ordos Basin. The analysis is based on the data collated from cores,thin sections,casting thin sections,scanning electron microscopy( SEM) and mercury intrusions. In order to study the reservoirs' diagenetic facies,firstly,the type of diagenesis and its characteristics should be ascertained. Secondly,based on the combined porosity and permeability data,the Chang 8 formation was segregated into four types of diagenetic facies. Thirdly,based on the logging response characteristics of the diagenesis,the logging identification standard of the diagenetic facies was established and used in the diagenetic facies identification of the wells. Finally,based on the results of the above study,the distribution of diagenetic facies between wells can be predicted,and the development regularities of the diagenetic facies summarized. From the study,the diagenetic facies of the Chang 8 formation in the west of Mahuangshan area can be divided into four types,which are porphyritic corroded porosity diagenetic facies,carbonate cemented tight diagenetic facies,clay minerals cemented tight diagenetic facies and compacted tight diagenetic facies. The porphyritic corroded porosity diagenetic facies mainly developed in an underwater distributary channel microfacies,possessing the most excellent properties such as,transverse ductility and connectivity. Carbonate cemented tight diagenetic facies and clay minerals cemented tight diagenetic facies mainly developed in an underwater distributary channel,sheet sand, debouch bar microfacies, possessing the second physical property. Compacted tight diagenetic facies mainly developed in a distributary bay microfacies and pre-delta mud microfacies,possessing the third physical properties also with continuous development characteristics,which happens to be the most well developed diagenetic facies type in the study area. High quality diagenetic facies had mainly developed in an advantageous sedimentary microfacies, which possessed a controlling function on porosity and permeability.Porphyritic corroded porosity diagenetic facies had the highest testing of oil daily production and unit productivity rates,which is the most suitable diagenetic facies of the most conducive to the enrichment and exploitation of oil and gas,and simultaneously is the key development area for next step. Clay minerals cemented tight diagenetic facies and compacted tight diagenetic facies however possess a wide distribution,but with a low production rate,which is mainly due to its poor physical properties. For improved productivity,acidification and fracturing always be taken into consideration in order to modify the reservoir into two types of diagenetic facies.
The study is focuses on the Chang 8 formation in west area of Mahuangshan,Ordos Basin. The analysis is based on the data collated from cores,thin sections,casting thin sections,scanning electron microscopy( SEM) and mercury intrusions. In order to study the reservoirs' diagenetic facies,firstly,the type of diagenesis and its characteristics should be ascertained. Secondly,based on the combined porosity and permeability data,the Chang 8 formation was segregated into four types of diagenetic facies. Thirdly,based on the logging response characteristics of the diagenesis,the logging identification standard of the diagenetic facies was established and used in the diagenetic facies identification of the wells. Finally,based on the results of the above study,the distribution of diagenetic facies between wells can be predicted,and the development regularities of the diagenetic facies summarized. From the study,the diagenetic facies of the Chang 8 formation in the west of Mahuangshan area can be divided into four types,which are porphyritic corroded porosity diagenetic facies,carbonate cemented tight diagenetic facies,clay minerals cemented tight diagenetic facies and compacted tight diagenetic facies. The porphyritic corroded porosity diagenetic facies mainly developed in an underwater distributary channel microfacies,possessing the most excellent properties such as,transverse ductility and connectivity. Carbonate cemented tight diagenetic facies and clay minerals cemented tight diagenetic facies mainly developed in an underwater distributary channel,sheet sand, debouch bar microfacies, possessing the second physical property. Compacted tight diagenetic facies mainly developed in a distributary bay microfacies and pre-delta mud microfacies,possessing the third physical properties also with continuous development characteristics,which happens to be the most well developed diagenetic facies type in the study area. High quality diagenetic facies had mainly developed in an advantageous sedimentary microfacies, which possessed a controlling function on porosity and permeability.Porphyritic corroded porosity diagenetic facies had the highest testing of oil daily production and unit productivity rates,which is the most suitable diagenetic facies of the most conducive to the enrichment and exploitation of oil and gas,and simultaneously is the key development area for next step. Clay minerals cemented tight diagenetic facies and compacted tight diagenetic facies however possess a wide distribution,but with a low production rate,which is mainly due to its poor physical properties. For improved productivity,acidification and fracturing always be taken into consideration in order to modify the reservoir into two types of diagenetic facies.
引文
1赖锦,王贵文,王书南,等.碎屑岩储层成岩相研究现状及进展.地球科学进展,2013;(1):39-50Lai J,Wang G W,Wang S N,et al.Research status and advances in the diagenetic facies of clastic reservoirs.Advances in Earth Science,2013;(1):39-50
2吕孝威,王少飞,万友利,等.鄂尔多斯盆地麻黄山西区块延8段成岩相特征及油气地质意义.东北石油大学学报,2013;(4):1-8,118LüX W,Wang S F,Wan Y L,et al.Diagenesis facies and significance of petroleum geology in the 8th member of the Yanan formation,west of the Mahuangshan,Ordos basin.Journal of Northeast Petroleum University,2013;(4):1-8,118
3付晶,吴胜和,付金华,等.鄂尔多斯盆地陇东地区延长组储层定量成岩相研究.地学前缘,2013;(2):86-97Fu J,Wu S H,Fu J H,et al.Research on quantitative diagenetic facies of the Yanchang formation in Longdong area,Ordos Basin.Earth Science Frontiers,2013;(2):86-97
4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.天然气地球科学,2013;(3):477-484Chu M J,Guo Z Q,Qi Y L,et al.Quantitative diagenesis and diagenetic facies analysis on Chang 8 Reservoir of Yanchang Formation in Ordos Basin.Natural Gas Geoscience,2013;(3):477-484
5王秀平,牟传龙.苏里格气田东二区盒8段储层成岩作用与成岩相研究.天然气地球科学,2013;(4):678-689Wang X P,Mou C L.Diagenesis and diagenetic facies of reservoir in He 8 section of Shihezi Formation in East II part of Sulige Gas Field.Natural Gas Geoscience,2013;(4):678-689
6赖锦,王贵文,信毅,等.库车坳陷巴什基奇克组致密砂岩气储层成岩相分析.天然气地球科学,2014;(7):1019-1032Lai J,Wang G W,Xin Y,et al.Diagenetic facies analysis of tight sandstone gas reservoir of Bashijiqike Formation in Kuqa Depression.Natural Gas Geoscience,2014;(7):1019-1032
7邹才能,陶士振,周慧,等.成岩相的形成、分类与定量评价方法.石油勘探与开发,2008;(5):526-540Zou C N,Tao S Z,Zhou H,et al.Genesis,classification and evaluation method of diagenetic facies.Petroleum Exploration and Development,2008;(5):526-540
8张响响,邹才能,朱如凯,等.川中地区上三叠统须家河组储层成岩相.石油学报,2011;(02):257-264Zhang X X,Zou C N,Zhu R K,et al.Reservoir diagenetic facies of the Upper Triassic Xujiahe Formation in the Central Sichuan Basin.Acta Petrolei Sinica,2011;(2):257-264
9张明松,雷卞军,黄有根,等.鄂尔多斯盆地余兴庄-子洲地区上古生界山32储层砂岩成岩作用与成岩相.沉积学报,2011;(6):1031-1040Zhang M S,Lei B J,Huang Y G,et al.Diagenesis and diagenetic facies of sandstones reservoir in the Upper Palaeozoic Shan32of Yuxingzhuang-Zizhou area,Ordos Basin.Acta Sedimentologica Sinica,2011;(6):1031-1040
10赖锦,王贵文,王书南,等.碎屑岩储层成岩相测井识别方法综述及研究进展.中南大学学报(自然科学版),2013;(12):4942-4953Lai J,Wang G W,Wang S N,et al.Overview and research progress in logging recognition method of clastic reservoir diagenetic facies.Journal of Central South University(Science and Technology),2013;(12):4942-4953
11张响响,邹才能,陶士振,等.四川盆地广安地区上三叠统须家河组四段低孔渗砂岩成岩相类型划分及半定量评价.沉积学报,2010;(1):50-57Zhang X X,Zou C N,Tao S Z,et al.Diagenetic facies types and semiquantitative evaluation of low porosity and permeability sandstones of the Fourth Member Xujiahe Formation Guangan area,Sichuan Basin.Acta Sedimentologica Sinica,2010;(1):50-57
2吕孝威,王少飞,万友利,等.鄂尔多斯盆地麻黄山西区块延8段成岩相特征及油气地质意义.东北石油大学学报,2013;(4):1-8,118LüX W,Wang S F,Wan Y L,et al.Diagenesis facies and significance of petroleum geology in the 8th member of the Yanan formation,west of the Mahuangshan,Ordos basin.Journal of Northeast Petroleum University,2013;(4):1-8,118
3付晶,吴胜和,付金华,等.鄂尔多斯盆地陇东地区延长组储层定量成岩相研究.地学前缘,2013;(2):86-97Fu J,Wu S H,Fu J H,et al.Research on quantitative diagenetic facies of the Yanchang formation in Longdong area,Ordos Basin.Earth Science Frontiers,2013;(2):86-97
4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.天然气地球科学,2013;(3):477-484Chu M J,Guo Z Q,Qi Y L,et al.Quantitative diagenesis and diagenetic facies analysis on Chang 8 Reservoir of Yanchang Formation in Ordos Basin.Natural Gas Geoscience,2013;(3):477-484
5王秀平,牟传龙.苏里格气田东二区盒8段储层成岩作用与成岩相研究.天然气地球科学,2013;(4):678-689Wang X P,Mou C L.Diagenesis and diagenetic facies of reservoir in He 8 section of Shihezi Formation in East II part of Sulige Gas Field.Natural Gas Geoscience,2013;(4):678-689
6赖锦,王贵文,信毅,等.库车坳陷巴什基奇克组致密砂岩气储层成岩相分析.天然气地球科学,2014;(7):1019-1032Lai J,Wang G W,Xin Y,et al.Diagenetic facies analysis of tight sandstone gas reservoir of Bashijiqike Formation in Kuqa Depression.Natural Gas Geoscience,2014;(7):1019-1032
7邹才能,陶士振,周慧,等.成岩相的形成、分类与定量评价方法.石油勘探与开发,2008;(5):526-540Zou C N,Tao S Z,Zhou H,et al.Genesis,classification and evaluation method of diagenetic facies.Petroleum Exploration and Development,2008;(5):526-540
8张响响,邹才能,朱如凯,等.川中地区上三叠统须家河组储层成岩相.石油学报,2011;(02):257-264Zhang X X,Zou C N,Zhu R K,et al.Reservoir diagenetic facies of the Upper Triassic Xujiahe Formation in the Central Sichuan Basin.Acta Petrolei Sinica,2011;(2):257-264
9张明松,雷卞军,黄有根,等.鄂尔多斯盆地余兴庄-子洲地区上古生界山32储层砂岩成岩作用与成岩相.沉积学报,2011;(6):1031-1040Zhang M S,Lei B J,Huang Y G,et al.Diagenesis and diagenetic facies of sandstones reservoir in the Upper Palaeozoic Shan32of Yuxingzhuang-Zizhou area,Ordos Basin.Acta Sedimentologica Sinica,2011;(6):1031-1040
10赖锦,王贵文,王书南,等.碎屑岩储层成岩相测井识别方法综述及研究进展.中南大学学报(自然科学版),2013;(12):4942-4953Lai J,Wang G W,Wang S N,et al.Overview and research progress in logging recognition method of clastic reservoir diagenetic facies.Journal of Central South University(Science and Technology),2013;(12):4942-4953
11张响响,邹才能,陶士振,等.四川盆地广安地区上三叠统须家河组四段低孔渗砂岩成岩相类型划分及半定量评价.沉积学报,2010;(1):50-57Zhang X X,Zou C N,Tao S Z,et al.Diagenetic facies types and semiquantitative evaluation of low porosity and permeability sandstones of the Fourth Member Xujiahe Formation Guangan area,Sichuan Basin.Acta Sedimentologica Sinica,2010;(1):50-57