渤海南部海域新生代岩浆活动对古近系优质储层的控制作用
|
摘要
近年来在渤海南部海域黄河口凹陷和莱州湾凹陷发现了渤中34-A和垦利6-B两个新生界岩浆岩下的大中型油田,引领了岩浆岩区的勘探热潮。这2个油田虽然岩浆喷发模式类似,但同样是3 000 m深度附近的东营组辫状河三角洲储层,渤中34-A区的储层物性远远优于垦利6-B区。基于储层物性分析、岩心薄片观察、成岩阶段划分,结合岩浆活动及物源体系分析,对研究区古近系储层物性差异成因进行了研究,结果表明:近物源方向的火山喷发活动能够为玄武岩水解富铁镁水介质输送到目标区创造条件,这种弱碱性水介质可以抑制早期长石蚀变、高岭土沉淀,进而有利于原生孔隙的保存;同沉积早期火山喷发形成的桥墩状构架有效支撑了古近系储层粒间孔隙的保存,减缓了塑性火成岩岩屑的变形;新近纪晚期火山活动产生的热液流体加速了成岩阶段演化,形成大量菱铁矿重结晶,对孔隙保存不利。新生代多期岩浆活动对渤海南部海域古近系优质储层控制作用的差异性明显,寻找近物源方向、同沉积早期火山喷发的古近系优质储层发育区,是渤海海域深层岩浆岩发育区的勘探方向。本文研究成果可为渤海湾盆地及其他类似新生界岩浆活动区的优质储层研究提供参考。
In recent years, two large and medium-sized oilfields of BZ34-A and KL6-B under the Cenozoic magmatic rocks have been discovered in Huanghekou sag and Laizhouwan sag in the southern Bohai sea, leading the exploration boom in the magmatic area. Although the magmatic eruption patterns in these two oilfields are similar and both are braided river delta reservoirs of Dongying Formation near the depth of 3000 m, the reservoir physical properties of the BZ34-A area are much better than those in KL6-B area. Based on reservoir physical property analysis, core slice observation, diagenesis stage division, magmatic activity and provenance system analysis, the origin of physical property difference of Paleogene reservoirs in the study area is studied. The results show that the volcanic eruption in the near source direction can create favorable conditions for basalt to hydrolyze Fe-rich and Mg-rich water medium and to be transported to the target area. This weak alkaline water medium can inhibit the alteration of feldspar and the precipitation of kaolin in the early stage. Thus, it is beneficial to the preservation of primary pores. The bridge piers formed by volcanic eruptions in the early synsedimentary period effectively supported the preservation of intergranular pores in Paleogene reservoirs and slowed down the deformation of plastic igneous debris. Hydrothermal fluid generated by late Neogene volcanic activity accelerated the diagenetic evolution and formed a large number of siderite recrystallization which is unfavorable for pore preservation. The Cenozoic multi-period magmatic activity has obvious differences in controlling the Paleogene high quality reservoirs in the southern Bohai sea. The exploration direction of deep magmatic rock development area in Bohai sea is to find out the direction of the source of the Paleogene and the developing area of the Paleogene high quality reservoir in the early sedimentary period of volcanic eruption. The results of this paper can be used as a reference for the study of high quality reservoirs in Bohai Bay basin and other similar Cenozoic magmatic active regions.
In recent years, two large and medium-sized oilfields of BZ34-A and KL6-B under the Cenozoic magmatic rocks have been discovered in Huanghekou sag and Laizhouwan sag in the southern Bohai sea, leading the exploration boom in the magmatic area. Although the magmatic eruption patterns in these two oilfields are similar and both are braided river delta reservoirs of Dongying Formation near the depth of 3000 m, the reservoir physical properties of the BZ34-A area are much better than those in KL6-B area. Based on reservoir physical property analysis, core slice observation, diagenesis stage division, magmatic activity and provenance system analysis, the origin of physical property difference of Paleogene reservoirs in the study area is studied. The results show that the volcanic eruption in the near source direction can create favorable conditions for basalt to hydrolyze Fe-rich and Mg-rich water medium and to be transported to the target area. This weak alkaline water medium can inhibit the alteration of feldspar and the precipitation of kaolin in the early stage. Thus, it is beneficial to the preservation of primary pores. The bridge piers formed by volcanic eruptions in the early synsedimentary period effectively supported the preservation of intergranular pores in Paleogene reservoirs and slowed down the deformation of plastic igneous debris. Hydrothermal fluid generated by late Neogene volcanic activity accelerated the diagenetic evolution and formed a large number of siderite recrystallization which is unfavorable for pore preservation. The Cenozoic multi-period magmatic activity has obvious differences in controlling the Paleogene high quality reservoirs in the southern Bohai sea. The exploration direction of deep magmatic rock development area in Bohai sea is to find out the direction of the source of the Paleogene and the developing area of the Paleogene high quality reservoir in the early sedimentary period of volcanic eruption. The results of this paper can be used as a reference for the study of high quality reservoirs in Bohai Bay basin and other similar Cenozoic magmatic active regions.
引文
[1] 江怀友,鞠斌山,江良冀,等.世界火成岩油气勘探开发现状与展望[J].特种油气田,2011,18(2):1-6.JIANG Huaiyou,JU Binshan,JIANG Liangji,et al.Current situation and prospect of global igneous reservoir exploration and development[J].Special Oil & Gas Reservoirs,2011,18(2):1-6.
[2] KAWAMOTO T.Distribution and alteration of the volcanic reservoir in the Minami-Nagaoka gas field [J].Journal of the Japanese Association for Petroleum Technology,2001,66:46-55.
[3] 赵建章,石彦民,孙维昭,等. 海南福山凹陷火成岩分布特征及对油气勘探的影响[J].中国石油勘探,2007,12(1):38-42.ZHAO Jianzhang,SHI Yanming,SUN Weizhao,et al.Distribution of igneous rock and its effect on petroleum exploration in Fushan Sag[J].China Petroleum Exploration,2007,12(1):38-42.
[4] 石胜群.火成岩地表复杂区地震资料的构造解释及应用[J].沉积及特提斯地质,2008,28(3):3-8.SHI Shengqun.Tectonic interpretation of the seismic data from the volcanic terraces in the Maichen depression[J].Sedimentary Geology and Tethyan Geology,2008,28(3):3-8.
[5] 郝沪军,张向涛.重磁资料在潮汕坳陷中生界油气勘探中的应用[J].中国海上油气( 地质),2003,17(2):128-132.HAO Hujun,ZHANG Xiangtao.An application of gravimetric and magnetic data in Mesozoic petroleum exproration in Chaoshan depression,South China Sea[J].China Offshore Oil and Gas(Geology),2003,17(2):128-132.
[6] 石彦民,吴炜强,刘菊,等.福山凹陷浅表层火山岩对地震资料品质的影响浅析[J].华南地震,2007,27(3):9-15.SHI Yanmin,WU Weiqiang,LIU Ju,et al.Preliminary analysis of the influence of near-surface or shallow layer lava in Fushan Sag to seismic data quality[J].South China Journal of Seismology,2007,27(3):9-15.
[7] 杨树春,仝志刚,贺清,等.潮汕坳陷中生界生烃历史及火成岩侵入影响分析:以LF35-1-1井为例[J].中国海上油气,2008,20(3):152-156.YANG Shuchun,TONG Zhigang,HE Qing,et al.Mesozoic hydrocarbon generation history and igneous intrusion impacts in Chaoshan depression,South China Sea:A case of LF35-1-1 well[J].China Offshore Oil and Gas,2008,20(3):152-156.
[8] 包洪平,杨奕华,王晓方,等.同沉积期火山作用对鄂尔多斯盆地上古生界砂岩储层形成的意义[J].古地理学报,2007,8(4):397-406.BAO Hongping,YANG Yihua,WANG Xiaofang,et al.Significance of synsedimentary volcanism for formation of sandstone reservoirs of the Upper Paleozoic in Ordos Basin[J].Journal of Palaeogeography,2007,8(4):397-406.
[9] 邹明亮,黄思静,胡作维,等.西湖凹陷平湖组砂岩中碳酸盐胶结物形成机制及其对储层质量的影响[J].岩性油藏,2008,20(1):47-52.ZOU Mingliang,HUANG Sijing,HU Zuowei,et al.The origin of carbonate cements and the influence on reservoir quality of Pinghu Formation in Xihu Sag,East China Sea[J].Lithologic Reservoirs,2008,20(1):47-52.
[10] 高玉巧,刘立.岩浆侵入活动对砂岩的改造作用研究简介[J].地质科技情报,2003,22(2):13-16.GAO Yuqiao,LIU Li.Brief introduction of effect of magma intrusion activity on sandstone[J].Geological Science and Technology Information,2003,22(2):13-16.
[11] 陶洪兴,徐元秀.热液作用与油气储层[J].石油勘探与开发,1995,21(6):92-98.TAO Hongxing,XU Yuanxiu.Hydrothermal activity and oil-gas reservoir[J].Petroleum Exploration and Development,1995,21(6):92-98.
[12] 于志超.歧口凹陷古近纪热流体活动及其对碎屑岩储层的影响[D].长春:吉林大学,2010.YU Zhichao.The paleogene thermal fluid activities and their impact on clastic reservoir in Qikou Sag[D].Changchun:Jilin University,2010.
[13] MCKINLEY J M,WORDEN R H,RUFFELL A H.Contract diagenesis:The effect of an intrusion on reservoir qualityin the triassic sherwood sandstone group,Northern Ireland[J]. Journal of Sendimentary Research,2001,71(3):484-495.
[14] 孙和风,周心怀,彭文绪,等.渤海南部黄河口凹陷晚期成藏特征及富集模式[J].石油勘探与开发,2011,38(3):307-313.SUN Hefeng,ZHOU Xinhuai,PENG Wenxu,et al.Late-stage hydrocarbon accumulation and enrichment in the Huanghekou Sag,southern Bohai Sea[J].Petroleum Exploration and Development,2011,38(3):307-313.
[15] 牛成民.渤海南部海域莱州湾凹陷构造演化与油气成藏[J].石油与天然气地质,2012,33(3):424-431.NIU Chengmin.Tectonic evolution and hydrocarbon accumulation of Laizhouwan depression in southern Bohai Sea[J].Oil & Gas Geology,2012,33(3):424-431.
[16] 刘中云,肖尚斌,姜在兴.渤海湾盆地第三系火山岩及其成因[J].石油大学学报(自然科学版),2001,25(1):22-26.LIU Zhongyun,XIAO Shangbin,JIANG Zaixing.Volcanic rocks of Bohai Bay Basin in Tertiary and their genesis[J].Journal of The University of Petroleum,China,2001,25(1):22-26.
[17] 朱红涛,刘依梦,王永利,等.渤海湾盆地黄河口凹陷BZ34-9区带火山岩三维刻画及火山喷发期次[J].地球科学,2014,39(9):1309-1316.ZHU Hongtao,LIU Yimeng,WANG Yongli,et al.Volcanic eruption phases and 3-D characterization of volcanic rocks in BZ34-9 block of Huanghekou Sag,Bohai Bay Basin[J].Earth Science,2014,39(9):1309-1316.
[18] 郭涛,杨波,陈磊,等.岩浆岩三维精细刻画:黄河口凹陷南斜坡渤中34-9油田的发现[J].中国海上油气,2016,28(2):71-77.DOI:10.11935/j.issn.1673-1506.2016.02.008.GUO Tao,YANG Bo,CHEN Lei,et al.3D fine description of magmatic rocks:The discovery of 34-9 oilfiled in the southern slope of Huanghekou sag[J].China Offshore Oil and Gas,2016,28(2):71-77.DOI:10.11935/j.issn.1673-1506.2016.02.008.
[19] 赵国祥,刘立,曲希玉,等.砂岩中自生绢云母的成因及意义:以海拉尔盆地乌尔逊凹陷乌19井为例[J].吉林地质,2010,29(1):12-17.ZHAO Guoxiang,LIU Li,QU Xiyu,et al.Geological genesis and significance of the sericite in sandstone:A case study from the Well Wu19,Wuerxun Depression of Hailar Basin[J].Jilin Geology,2010,29(1):12-17.
[2] KAWAMOTO T.Distribution and alteration of the volcanic reservoir in the Minami-Nagaoka gas field [J].Journal of the Japanese Association for Petroleum Technology,2001,66:46-55.
[3] 赵建章,石彦民,孙维昭,等. 海南福山凹陷火成岩分布特征及对油气勘探的影响[J].中国石油勘探,2007,12(1):38-42.ZHAO Jianzhang,SHI Yanming,SUN Weizhao,et al.Distribution of igneous rock and its effect on petroleum exploration in Fushan Sag[J].China Petroleum Exploration,2007,12(1):38-42.
[4] 石胜群.火成岩地表复杂区地震资料的构造解释及应用[J].沉积及特提斯地质,2008,28(3):3-8.SHI Shengqun.Tectonic interpretation of the seismic data from the volcanic terraces in the Maichen depression[J].Sedimentary Geology and Tethyan Geology,2008,28(3):3-8.
[5] 郝沪军,张向涛.重磁资料在潮汕坳陷中生界油气勘探中的应用[J].中国海上油气( 地质),2003,17(2):128-132.HAO Hujun,ZHANG Xiangtao.An application of gravimetric and magnetic data in Mesozoic petroleum exproration in Chaoshan depression,South China Sea[J].China Offshore Oil and Gas(Geology),2003,17(2):128-132.
[6] 石彦民,吴炜强,刘菊,等.福山凹陷浅表层火山岩对地震资料品质的影响浅析[J].华南地震,2007,27(3):9-15.SHI Yanmin,WU Weiqiang,LIU Ju,et al.Preliminary analysis of the influence of near-surface or shallow layer lava in Fushan Sag to seismic data quality[J].South China Journal of Seismology,2007,27(3):9-15.
[7] 杨树春,仝志刚,贺清,等.潮汕坳陷中生界生烃历史及火成岩侵入影响分析:以LF35-1-1井为例[J].中国海上油气,2008,20(3):152-156.YANG Shuchun,TONG Zhigang,HE Qing,et al.Mesozoic hydrocarbon generation history and igneous intrusion impacts in Chaoshan depression,South China Sea:A case of LF35-1-1 well[J].China Offshore Oil and Gas,2008,20(3):152-156.
[8] 包洪平,杨奕华,王晓方,等.同沉积期火山作用对鄂尔多斯盆地上古生界砂岩储层形成的意义[J].古地理学报,2007,8(4):397-406.BAO Hongping,YANG Yihua,WANG Xiaofang,et al.Significance of synsedimentary volcanism for formation of sandstone reservoirs of the Upper Paleozoic in Ordos Basin[J].Journal of Palaeogeography,2007,8(4):397-406.
[9] 邹明亮,黄思静,胡作维,等.西湖凹陷平湖组砂岩中碳酸盐胶结物形成机制及其对储层质量的影响[J].岩性油藏,2008,20(1):47-52.ZOU Mingliang,HUANG Sijing,HU Zuowei,et al.The origin of carbonate cements and the influence on reservoir quality of Pinghu Formation in Xihu Sag,East China Sea[J].Lithologic Reservoirs,2008,20(1):47-52.
[10] 高玉巧,刘立.岩浆侵入活动对砂岩的改造作用研究简介[J].地质科技情报,2003,22(2):13-16.GAO Yuqiao,LIU Li.Brief introduction of effect of magma intrusion activity on sandstone[J].Geological Science and Technology Information,2003,22(2):13-16.
[11] 陶洪兴,徐元秀.热液作用与油气储层[J].石油勘探与开发,1995,21(6):92-98.TAO Hongxing,XU Yuanxiu.Hydrothermal activity and oil-gas reservoir[J].Petroleum Exploration and Development,1995,21(6):92-98.
[12] 于志超.歧口凹陷古近纪热流体活动及其对碎屑岩储层的影响[D].长春:吉林大学,2010.YU Zhichao.The paleogene thermal fluid activities and their impact on clastic reservoir in Qikou Sag[D].Changchun:Jilin University,2010.
[13] MCKINLEY J M,WORDEN R H,RUFFELL A H.Contract diagenesis:The effect of an intrusion on reservoir qualityin the triassic sherwood sandstone group,Northern Ireland[J]. Journal of Sendimentary Research,2001,71(3):484-495.
[14] 孙和风,周心怀,彭文绪,等.渤海南部黄河口凹陷晚期成藏特征及富集模式[J].石油勘探与开发,2011,38(3):307-313.SUN Hefeng,ZHOU Xinhuai,PENG Wenxu,et al.Late-stage hydrocarbon accumulation and enrichment in the Huanghekou Sag,southern Bohai Sea[J].Petroleum Exploration and Development,2011,38(3):307-313.
[15] 牛成民.渤海南部海域莱州湾凹陷构造演化与油气成藏[J].石油与天然气地质,2012,33(3):424-431.NIU Chengmin.Tectonic evolution and hydrocarbon accumulation of Laizhouwan depression in southern Bohai Sea[J].Oil & Gas Geology,2012,33(3):424-431.
[16] 刘中云,肖尚斌,姜在兴.渤海湾盆地第三系火山岩及其成因[J].石油大学学报(自然科学版),2001,25(1):22-26.LIU Zhongyun,XIAO Shangbin,JIANG Zaixing.Volcanic rocks of Bohai Bay Basin in Tertiary and their genesis[J].Journal of The University of Petroleum,China,2001,25(1):22-26.
[17] 朱红涛,刘依梦,王永利,等.渤海湾盆地黄河口凹陷BZ34-9区带火山岩三维刻画及火山喷发期次[J].地球科学,2014,39(9):1309-1316.ZHU Hongtao,LIU Yimeng,WANG Yongli,et al.Volcanic eruption phases and 3-D characterization of volcanic rocks in BZ34-9 block of Huanghekou Sag,Bohai Bay Basin[J].Earth Science,2014,39(9):1309-1316.
[18] 郭涛,杨波,陈磊,等.岩浆岩三维精细刻画:黄河口凹陷南斜坡渤中34-9油田的发现[J].中国海上油气,2016,28(2):71-77.DOI:10.11935/j.issn.1673-1506.2016.02.008.GUO Tao,YANG Bo,CHEN Lei,et al.3D fine description of magmatic rocks:The discovery of 34-9 oilfiled in the southern slope of Huanghekou sag[J].China Offshore Oil and Gas,2016,28(2):71-77.DOI:10.11935/j.issn.1673-1506.2016.02.008.
[19] 赵国祥,刘立,曲希玉,等.砂岩中自生绢云母的成因及意义:以海拉尔盆地乌尔逊凹陷乌19井为例[J].吉林地质,2010,29(1):12-17.ZHAO Guoxiang,LIU Li,QU Xiyu,et al.Geological genesis and significance of the sericite in sandstone:A case study from the Well Wu19,Wuerxun Depression of Hailar Basin[J].Jilin Geology,2010,29(1):12-17.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |