渤海海域石臼坨凸起东段36-3构造古近系沙二段储集层特征及控制因素

doi:10.11743/ogg20110604

摘要/Abstract

摘要：

利用岩心描述、常规薄片、铸体薄片和扫描电镜等化验分析资料,结合常规物性及勘探情况,对沙河街组二段储集层特征进行了系统分析,对储集物性、储集空间类型以及储层物性控制因素进行了深入的探讨。研究认为研究区沙河街组二段储集层为混积岩,岩性以生屑云岩为主,夹薄层砂砾岩;储层物性非常好,平均孔隙度为27.6%,平均渗透率为442×10^-3μm²,储层类型为高孔-高渗型;储集空间以原生孔隙和次生孔隙为主,原生孔隙多为粒间孔和生物体腔孔。研究发现,沉积作用和成岩作用是控制储集层物性的两个主要的因素,其中溶解作用和白云石化作用是造成现今优质储集空间的主要原因。同时指出了优质储层的分布规律,认为沙河街组二段中发现的生屑云岩和含陆源碎屑云岩等白云岩储层是油气富集场所,是今后有利勘探区。

关键词: 储集层特征, 控制因素, 沙河街组, 石臼坨凸起, 渤海海域

Abstract:

Various data including core description,conventional thin sections,casting thin sections and SEM,in combination with conventional physical properties of reservoirs and exploration results,were used to systemically analyze reservoir poroperm characteristics,reservoir space types and influencing factors of reservoir properties of the 2^nd member of Shahejie Formation.The study indicates that Shahejie Formation reservoirs are mixed carbonate/siliciclastic rocks dominated by bioclastic dolostone with thin sandy conglomerate interbeds.The poroperm characteristics are very good,with average porosity of 27.6% and permeability of 442×10^-3μm².The reservoir spaces are dominated by primary pores(mostly intergranular pores and skeletal pores)and secondary pores.Sed- imentation and diagenesis are the two key factors controlling the physical properties of reservoirs.Dissolution and dolomitization contribute to high quality reservoir spaces.In addition,the distribution of high quality reservoirs is also delineated.It is believed that dolostone reservoirs are favorable for hydrocarbon accumulation,thus are potential exploration targets in the future.

Key words: reservoir characteristics, controlling factor, Shahejie Formation, Shijiutuo uplift, Bohai Sea

中图分类号:

TE121.3

刘志刚,周心怀,李建平,等. 渤海海域石臼坨凸起东段36-3构造古近系沙二段储集层特征及控制因素[J]. 石油与天然气地质, 2011, 32(6): 832-838. doi: 10.11743/ogg20110604 Liu Zhigang,Zhou Xinhuai,Li Jianping,et al. Reservoir characteristics and controlling factors of the Paleogene Sha-2 member in 36-3 structure,Eastern Shijiutuo uplift,Bohai Sea[J]. Oil & Gas Geology, 2011, 32(6): 832-838. doi: 10.11743/ogg20110604

参考文献

[1] 张国良,姚长华,张云慧.从石臼坨凸起浅层油气的重大发现看渤东地区的勘探潜力[J].中国海上油气(地质),2000,14(2):84-92. Zhang Guoliang,Yao Changhua,Zhang Yunhui.An evaluation of exploration potential in Bodong area from the major discovery of shallow oil and gas in Shijiutuo uplift[J].China Offshore Oil and Gas,2000,14(2):84-92. [2] 王昕,周心怀,魏刚,等.勘探阶段成藏动力学研究方法初探[J].断块油气田,2010,17(2):177-180. Wang Xin,Zhou Xinhuai,Wei Gang,et al.Initial discussion on research of accumulation dynamics at hydrocarbon exploration stage[J].Fault-Block Oil & Gas Field,2010,17(2):177-180. [3] 张雄华.混积岩的分类及成因[J].地质科技情报,2000,19(4):31-34. Zhang Xionghua.Classification and origin of mixosediments[J].Geological Science and Technology Information,2000,19(4):31-34. [4] 沙庆安.混合沉积和和混积岩的讨论[J].古地理学报,2001a,3(3):63-66. Sha Qing’an.Discussion on mixing deposit and mixed rocks[J].Journal of Palaeogeography,2001a,3(3):63-66. [5] 马艳萍,刘立.大港滩海区第三系湖相混积岩的成因和成岩作用特征[J].沉积学报,2003,21(4):607-613. Ma Yanping,Liu Li.Sedimentary and diagenetic characteristics of Paleogene lacustrine "Hunji" Rock in beach district,Dagang[J].Acta Sedimentologica Sinica,2003,21(4):607-613. [6] 郭福生,严兆彬,杜杨松.混合沉积、混积岩和混积层系的讨论[J].地学前缘,2003,10(3):40. Guo Fusheng,Yan Zhaobin,Du Yangsong.Discussion of mixed deposit,hunji rock and mixed stratigraphy[J].Geoscience Frontiers,2003,10(3):40. [7] 沙庆安.混积岩一例-滇东震旦系陡山沱组砂质砂屑白云岩的成因[J].古地理学报,2001b,3(4):56-61. Sha Qing’an.An example of mixed rocks-origin of sandy doloarenite of the Sinian Doushantuo Formation in eastern Yunan Province[J].Journal of Palaeogeography,2001b,3(4):56-61. [8] 蔡进功,李从先.内蒙西南部石炭系碎屑岩-碳酸盐岩混合沉积特征[J].石油与天然气地质,1994,15(1):80-86. Cai Jingong,Li Congxian.Characteristics of carboniferous mixed siliciclatic and carbonate sediments in southwest Mongolia[J].Oil & Gas Geology,1994,15(1):80-86. [9] 王国忠,吕炳全,全松青.现代碳酸盐和陆源碎屑的混合沉积作用-涠洲岛珊瑚岸礁实例[J].石油与天然气地质,1987,8(1):15-27. Wang Guozhong,Lü Bingquan,Quan Songqing.Mixed sedimentation of recent carbonates and terrigenous clastics-example of the coral reef of the Weizhou Island[J].Oil & Gas Geology,1987,8(1):15-27. [10] 王宝清,胡明毅,胡爱梅,等.湖北南漳中三叠统巴东组碳酸盐与陆源碎屑混合沉积[J].石油与天然气地质,1993,14(4):285-291. Wang Baoqing,Hu Mingyi,Hu Aimei,et al.Mixed carbonate-terrigenous clastic sediments of Middle Triassic Badong formation in Nanzhang,Hubei[J].Oil & Gas Geology,1993,14(4):285-291. [11] 董艳蕾,朱筱敏,滑双军,等.黄骅坳陷沙河街组一段下亚段混合沉积成因类型及演化模式[J].石油与天然气地质,2011,32(1):98-107. Dong Yanlei,Zhu Xiaomin,Hua Shuangjun,et al.Genetic types and evolutionary model of mixed clastic-carbonate deposits in the lower part of the Sha-1 Formation,the Huanghua Depression[J].Oil & Gas Geology,2011,32(1):98-107. [12] 王英华,周书欣,张秀莲.中国湖相碳酸盐岩[M].徐州:中国矿业大学出版社,1993:100-115. Wang Yinghua,Zhou Shuxin,Zhang Xiulian.China lake-facies carbonate rock[M].Xuzhou:China University of Mining and Technology Press.1993:100-115. [13] Bathurst R G.Developments in sedimentology:carbonate sediments and their diagenesis[M].New York:Elsevier,1971,12:1-7. [14] 朱同兴,黄志英.地质记录中的海水白云岩化[J].岩相古地理,1993,13(5):16-25. Zhu Tongxing,Huang Zhiying.Seawater dolomitization in geologic records[J].Sedimentary Facies and Palaeogeograhpy,1993,13(5):16-25. [15] 傅宁,邓运华,张功成,等.南海北部叠合断陷盆地海陆过渡相烃源岩及成藏贡献-以珠二坳陷白云凹陷为例[J].石油学报,2010,21(4):559-566. Fu Ning,Deng Yunhua,Zhang Gongcheng,et al.Transitional source rock and its contribution to hydrocarbon accumulation in superimpose rift-subsidence basin of northern South China Sea-taking Baiyun Sag of Zhu Ⅱ Depression as an example[J].Acta Petrolei Sinica.2010,21(4):559-566. [16] 徐希坤,刘树根,时华星,等.中伊朗盆地Kashan地区油气地质条件研究[J].西南石油大学学报(自然科学版),2009,31(3):62-68. Xu Xikun,Liu Shugen,Shi Huaxing,et al.The hydrocarbon geology conditions of Kashan area in central Iranian Basin[J].Journal of Southwest Pertoleum University(Science & Technology Edition),2009,31(3):62-68. [17] 张宁生,任晓娟,魏金星,等.柴达木盆地南翼山混积岩储层岩石类型及其与油气分布的关系[J].石油学报,2006,27(1):42-46. Zhang Ningsheng,Ren Xiaojuan,Wei Jinxing,et al.Rock types of mixosedimentite reservoirs and oil-gas distribution in Nanyishan of Qaidam Basin[J].Acta Petrolei Sinica,2006,27(1):42-46. [18] 冯进来,胡凯,曹剑,等.陆源碎屑与碳酸盐混积岩及其油气地质意义[J].高校地质学报,2011,17(2):297-307. Feng Jinlai,Hu Kai,Cao Jian,et al.A review of mixed rocks of terrigenous clastics and carbonates and their petroleum-gas geological significance[J].Geological Journay of China Universities,2011,17(2):297-307.