渤海莱州湾凹陷KL油田沙河街组混积背景下的沉积特征与沉积演化
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摘要
渤海湾盆地莱州湾凹陷KL油田地区古近系沙河街组发育了陆源碎屑岩和碳酸盐岩的混合沉积构造,国内外学者在莱州湾凹陷地区已做了一些岩相古地理方面研究工作,但KL油田地区的混合沉积研究至今未涉及。由于KL油田地区钻遇沙河街组沙三下亚段的井较少(迄今全地区钻遇沙三下亚段井9口),本文充分利用有限的钻井资料,结合岩心资料、分析化验资料、单井沉积相解剖以及地震相分析,对渤海湾盆地莱州湾凹陷KL油田地区碳酸盐岩台地混合沉积特征以及沉积演化模式进行了较为深入的探讨。研究表明,KL油田古近系沙河街组主要以扇三角洲沉积体系为主,混积岩主要发育在沙河街组沙三下亚段,而沙三下亚段发育三种不同的沉积环境:KL-1井区发育辫状河三角洲,中部KL-4井区发育滨浅湖混积滩坝,东部KL-9井区在I油组处于潍北凸起物源供给区,发育了扇三角洲。沙三下亚段沉积时期,沉积物在碳酸盐岩台地上进行混合沉积,狭义上表现为混积岩,主要类型包括:泥质灰岩、含泥灰岩、灰质粉砂岩;广义上表现为混积层系,主要类型包括:含陆源碎屑一碳酸盐混积岩、含碳酸盐一陆源碎屑混积岩、碳酸质一陆源碎屑混积岩。
The Shahejie Formation of the Paleogene in the KL oilfield area of the Laizhouwan depression, Bohai Bay Basin has developed a mixed sedimentary structure of terrigenous clastic rocks and carbonate rocks. Domestic and foreign scholars have done some research on lithofacies palaeogeography in the Laizhouwan depression. However, the study of mixed sedimentation in the KL oilfield area has not been covered so far. Because there are fewer wells in the lower part of the Shahejie Formation in the KL oilfield area(so far, 9 underground wells have been drilled in the Shahejie Formation), this paper makes full use of limited drilling data, combined with core data, analytical laboratory data, and single well sedimentary facies. Anatomical and seismic facies analysis, the mixed sedimentary characteristics and sedimentary evolution patterns of carbonate platform in the KL oilfield of Laizhou Bay Sag, Bohai Bay Basin are discussed in depth. The study shows that the Shahejie Formation of the Paleogene in the KL oilfield is dominated by the fan delta sedimentary system. The mixed rock is mainly developed in the lower part of the Shahejie Formation, and the Shahejie Formation develops three different sedimentary environments: the KL-1 well. The braided river delta is developed, and the coastal shallow lake composting beach dam is developed in the middle KL-4 well area. The eastern KL-9 well area is located in the source belt supply area of ?the Weibei uplift in the I oil group, and a fan delta is developed. During the sedimentary period of the Lower Member of the Shahejie Formation, sediments were mixed and deposited on the carbonate platform. The narrowly defined areas were mixed rocks. The main types include: argillaceous limestone, marl-bearing limestone, and limestone siltstone. The main types include: terrigenous clastic-carbonate mixed rock, carbonate-terogenous clastic mixed rock, and carbonate-terogenous clastic mixed rock.
The Shahejie Formation of the Paleogene in the KL oilfield area of the Laizhouwan depression, Bohai Bay Basin has developed a mixed sedimentary structure of terrigenous clastic rocks and carbonate rocks. Domestic and foreign scholars have done some research on lithofacies palaeogeography in the Laizhouwan depression. However, the study of mixed sedimentation in the KL oilfield area has not been covered so far. Because there are fewer wells in the lower part of the Shahejie Formation in the KL oilfield area(so far, 9 underground wells have been drilled in the Shahejie Formation), this paper makes full use of limited drilling data, combined with core data, analytical laboratory data, and single well sedimentary facies. Anatomical and seismic facies analysis, the mixed sedimentary characteristics and sedimentary evolution patterns of carbonate platform in the KL oilfield of Laizhou Bay Sag, Bohai Bay Basin are discussed in depth. The study shows that the Shahejie Formation of the Paleogene in the KL oilfield is dominated by the fan delta sedimentary system. The mixed rock is mainly developed in the lower part of the Shahejie Formation, and the Shahejie Formation develops three different sedimentary environments: the KL-1 well. The braided river delta is developed, and the coastal shallow lake composting beach dam is developed in the middle KL-4 well area. The eastern KL-9 well area is located in the source belt supply area of ?the Weibei uplift in the I oil group, and a fan delta is developed. During the sedimentary period of the Lower Member of the Shahejie Formation, sediments were mixed and deposited on the carbonate platform. The narrowly defined areas were mixed rocks. The main types include: argillaceous limestone, marl-bearing limestone, and limestone siltstone. The main types include: terrigenous clastic-carbonate mixed rock, carbonate-terogenous clastic mixed rock, and carbonate-terogenous clastic mixed rock.
引文
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[8] 霍沈君,杨香华,王维,等.黄河口凹陷H-1构造沙河街组混积岩储层控制因素[J].现代地质,2015,29(6):1348-1359.HUO Shenjun,YANG Xianghua,WANG Wei,et al.Controlling factors on diamictite reservoir in Shahejie Formation,H-1 structure,Huanghekou depression[J].Geoscience,2015,29(6):1348-1359.
[9] Aguilera R.Sandstone vs.carbonate petroleum reservoirs:A global perspective on porosity-depth and porosity-permeability relationships:Discussion[J].AAPG Bulletin,2006,90(5):807-810.
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[12] 张雄华.混积岩的分类和成因[J].地质科技情报,2000,19(4):31-34.Zhang Xionghua.Classification and orign of mixosedimentite[J].Geological Science and Technology Information,2000,19(4):31-34.
[13] 刘超,陆刚,张喜,等.桂西北天峨孤立碳酸盐岩台地晚古生代沉积特征与演化[J].地质论评,2014,60(1):55-69.LIU Chao,LU Gang,ZHANG Xi,et al.Sedimentary characteristics and evolutionary stages in late paleozoic of Tian’e isolated platform in Northwestern Guangxi[J].Geological Review,2014,60(1):55-69.
[14] Bourdet J,Pironon J,Levresse G,et al.Petroleum accumulation and leakage in a deeply buried carbonate reservoir,Níspero field (Mexico)[J].Marine & Petroleum Geology,2010,27(1):126-142.
[15] 张雄华.混积岩的分类和成因[J].地质科技情报,2000,19(4):31-34.Zhang Xionghua.Classification and origin of mixosedimentite[J].Geological Science and Technology Information,2000,19(4):31-34.
[16] 谢锐杰.东营凹陷民丰地区沙三下段层序地层与沉积相研究[J].岩性油气藏,2008,20(3):39-43.XIE Rui-jie.Stratigraphic sequence and sedimentary facies of the lower part of Sha 3 member in Minfeng area of Dongying Sag[J].Litologic Reservoirs,2008,20(3):39-43.
[17] 倪新锋,沈安江,严威,等.塔里木盆地寒武系碳酸盐岩台地类型、台缘分段特征及勘探启示[J].天然气地球科学,2015,26(7):1245-1255.NI Xin-feng,SHEN An-jiang,YAN Wei,et al.Cambrian carbonate platform types,platform marigin segmentation characteristics and exploration enlightement in tarim basin[J].Naural Gas Geoscience,2015,26(7):1245-1255.
[18] 金振奎,石良,高白水,等.碳酸盐岩沉积相及相模式[J].沉积学报,2013,31(6):965-978.JIN Zhen-kui,SHI Liang,GAO Bai-shui,et al.Carbonate facies and facies models[J].Acta Sedimentologica Sinica,2013,31(6):965-978.
[2] 伏美燕,李娜,黄茜,等.滨岸—浅海混合沉积对海平面与气候变化的响应-以塔里木盆地巴麦地区石炭系为例[J].沉积学报,2017,35(6):1110-1120.FU Meiyan,LI Na,HUANG Qian,et al.Shoreline-neritic mixed sedimentation response to sea level change and paleoclimate:A case study from carboniferous in tarim basin[J].Acta Sedimentologica Sinica,2017,35(6):1110-1120.
[3] 辛云路,任建业,李建平.构造-古地貌对沉积的控制作用-以渤海南部莱州湾凹陷沙三段为例[J].石油勘探与开发,2013,40(3):302-308.Xin Yunlu,Ren jianye,Li jianping.Control of tectonic-paleogeomorphology on deposition:A case from the Shahejie Formation Sha 3 member,Laizhouwan sag,southern Bohai Sea[J].Petroleum Exploration and Development,2013,40(3):302-308.
[4] 冯进来,曹剑,胡凯,等.柴达木盆地中深层混积岩储层形成机制[J].岩石学报,2011,27(8):2461-2471.FENG Jinlai,CAO Jian,HU Kai,et al.Formation mechanism of migmatite reservoir in qaidam basin[J].Acta Petrologica Sinica,2011,27(8):2461-2471.
[5] 张建民,赵春明,杨庆红,等.渤海海域湖相碳酸盐岩储层研究方法-以XX油田深层生屑云岩为例[J].海洋石油,2010,30(4):32-38.Zhang Jianmin,Zhao Chunming,Yang Qinghong,et al.Research method of lacustrine carbonate rock in the Bohai Sea—taking bioclastic dolomite in XX oilfield as an example[J].Offshore Oil,2010,30(4):32-38.
[6] 黄雷,武强,王强,等.渤海湾盆地莱州湾凹陷新生代盆地演化[J].地质学报,2012,86(6):867-876.HUANG Lei,WU Qiang,WANG Qiang,et al.Cenozoic tectonic evolution of the laizhouwan sag in Bohai Bay Basin[J].Acta Geologica Sinica,2012,86(6):867-876.
[7] 王改卫,杜晓峰,王启明,等.莱州湾凹陷沙三中段高精度层序地层格架及沉积体系演化[J].沉积与特斯提地质,2015,35(4):17-24.Wang Gai-wei,DU Xiao-feng,WANG Qi-ming,et al.High-precision sequence stratigraphic framework and sedimentary system evolution in the middle submember of the 3rd member of the Shahejie Formation in the Laizhouwan depression[J].Sedimentary Geology and Tethyan Geology,2015,35(4):17-24.
[8] 霍沈君,杨香华,王维,等.黄河口凹陷H-1构造沙河街组混积岩储层控制因素[J].现代地质,2015,29(6):1348-1359.HUO Shenjun,YANG Xianghua,WANG Wei,et al.Controlling factors on diamictite reservoir in Shahejie Formation,H-1 structure,Huanghekou depression[J].Geoscience,2015,29(6):1348-1359.
[9] Aguilera R.Sandstone vs.carbonate petroleum reservoirs:A global perspective on porosity-depth and porosity-permeability relationships:Discussion[J].AAPG Bulletin,2006,90(5):807-810.
[10] Bloch S,Lander R H,Bonnell L.Anomalously high porosity and permeability in deeply buried sandstone reservoirs:Origin and predictability[J].AAPG Bulletin,2002,86(2):301-328.
[11] 姜秀芳.济阳坳陷沙四段湖相碳酸盐岩分布规律及沉积模式[J].油气地质与采收率,2010,17(6):12-15.Jiang Xiufang.The distribution pattern and sedimentary mode of the carbonate rock in Sha4 member in Jiyang depression[J].PGRE,2010,17(6):12-15.
[12] 张雄华.混积岩的分类和成因[J].地质科技情报,2000,19(4):31-34.Zhang Xionghua.Classification and orign of mixosedimentite[J].Geological Science and Technology Information,2000,19(4):31-34.
[13] 刘超,陆刚,张喜,等.桂西北天峨孤立碳酸盐岩台地晚古生代沉积特征与演化[J].地质论评,2014,60(1):55-69.LIU Chao,LU Gang,ZHANG Xi,et al.Sedimentary characteristics and evolutionary stages in late paleozoic of Tian’e isolated platform in Northwestern Guangxi[J].Geological Review,2014,60(1):55-69.
[14] Bourdet J,Pironon J,Levresse G,et al.Petroleum accumulation and leakage in a deeply buried carbonate reservoir,Níspero field (Mexico)[J].Marine & Petroleum Geology,2010,27(1):126-142.
[15] 张雄华.混积岩的分类和成因[J].地质科技情报,2000,19(4):31-34.Zhang Xionghua.Classification and origin of mixosedimentite[J].Geological Science and Technology Information,2000,19(4):31-34.
[16] 谢锐杰.东营凹陷民丰地区沙三下段层序地层与沉积相研究[J].岩性油气藏,2008,20(3):39-43.XIE Rui-jie.Stratigraphic sequence and sedimentary facies of the lower part of Sha 3 member in Minfeng area of Dongying Sag[J].Litologic Reservoirs,2008,20(3):39-43.
[17] 倪新锋,沈安江,严威,等.塔里木盆地寒武系碳酸盐岩台地类型、台缘分段特征及勘探启示[J].天然气地球科学,2015,26(7):1245-1255.NI Xin-feng,SHEN An-jiang,YAN Wei,et al.Cambrian carbonate platform types,platform marigin segmentation characteristics and exploration enlightement in tarim basin[J].Naural Gas Geoscience,2015,26(7):1245-1255.
[18] 金振奎,石良,高白水,等.碳酸盐岩沉积相及相模式[J].沉积学报,2013,31(6):965-978.JIN Zhen-kui,SHI Liang,GAO Bai-shui,et al.Carbonate facies and facies models[J].Acta Sedimentologica Sinica,2013,31(6):965-978.
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