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    南海南部北康盆地碳酸盐岩储层特征及油气成藏

    鄢伟 张光学 张莉 杨振 王后金 胡小强 雷振宇 孙鸣

    鄢伟, 张光学, 张莉, 杨振, 王后金, 胡小强, 雷振宇, 孙鸣, 2022. 南海南部北康盆地碳酸盐岩储层特征及油气成藏. 地球科学, 47(7): 2549-2561. doi: 10.3799/dqkx.2022.073
    引用本文: 鄢伟, 张光学, 张莉, 杨振, 王后金, 胡小强, 雷振宇, 孙鸣, 2022. 南海南部北康盆地碳酸盐岩储层特征及油气成藏. 地球科学, 47(7): 2549-2561. doi: 10.3799/dqkx.2022.073
    Yan Wei, Zhang Guangxue, Zhang Li, Yang Zhen, Wang Houjin, Hu Xiaoqiang, Lei Zhenyu, Sun Ming, 2022. Carbonate Reservoirs Characteristics and Hydrocarbon Accumulation in Beikang Basin, Southern South China Sea. Earth Science, 47(7): 2549-2561. doi: 10.3799/dqkx.2022.073
    Citation: Yan Wei, Zhang Guangxue, Zhang Li, Yang Zhen, Wang Houjin, Hu Xiaoqiang, Lei Zhenyu, Sun Ming, 2022. Carbonate Reservoirs Characteristics and Hydrocarbon Accumulation in Beikang Basin, Southern South China Sea. Earth Science, 47(7): 2549-2561. doi: 10.3799/dqkx.2022.073

    南海南部北康盆地碳酸盐岩储层特征及油气成藏

    doi: 10.3799/dqkx.2022.073
    基金项目: 

    南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项 GML2019ZD0208

    中国地质调查局项目 DD20221860

    中国地质调查局项目 DD20191009

    广州市科技计划项目 202201011397

    详细信息
      作者简介:

      鄢伟(1987-),男,博士,高级工程师,主要从事深水油气地质、碳酸盐岩沉积和储层方面的研究. ORCID:0000-0002-3038-3191. E-mail:yanwei021066@126.com

      通讯作者:

      张光学, E-mail: zhguangxue@tom.com

    • 中图分类号: P618.13

    Carbonate Reservoirs Characteristics and Hydrocarbon Accumulation in Beikang Basin, Southern South China Sea

    • 摘要: 在南海扩张过程中微板块断裂、碰撞、拼接的构造背景下,南海南部中新世以来发育碳酸盐岩台地及生物礁,经过后期成岩改造形成了大量碳酸盐岩储层并蕴藏着丰富的油气资源.为了了解该海域碳酸盐岩储层的发育特征和成因机制,以北康盆地高精度二维地震资料为基础并结合邻区岩心、薄片资料,对该区域碳酸盐岩储层发育的类型、储集空间、成岩作用以及控制因素开展了系统研究.结果表明,南海南部碳酸盐岩储层类型多且储集空间丰富,主要有两类,分别为礁滩储层和不整合面岩溶储层;发育多种孔隙类型,包括原生孔隙和次生孔隙,以次生孔隙为主,包括铸模孔、粒内溶孔、粒间溶孔和晶内溶孔等. 该区域碳酸盐岩储集空间主要受白垩化作用、溶蚀作用和白云岩化的建设性改造,并且主要受构造、沉积、古气候和流体活动因素的控制.北康盆地碳酸盐岩可以作为良好的储层,并具有良好的油气成藏条件,能形成“下生上储”的碳酸盐岩油气藏.

       

    • 图  1  南海南部北康盆地区域位置及构造单元划分

      红色直线为图 2图 3图 4图 6地震剖面位置

      Fig.  1.  The location and tectonic units of Beikang Basin in the southern South China Sea

      图  2  北康盆地礁滩储层地震剖面解释

      Fig.  2.  Seismic profile interpretation of reef-shoal reservoir in Beikang Basin, southern South China Sea

      图  3  北康盆地碳酸盐岩潜山岩溶储层地震剖面解释

      Fig.  3.  Seismic profile interpretation of buried hill karst reservoir in Beikang Basin, southern South China Sea

      图  4  北康盆地碳酸盐岩层间岩溶储层地震剖面解释

      Fig.  4.  Seismic profile interpretation of interlayer karst reservoirs in Beikang Basin, southern South China Sea

      图  5  北康盆地碳酸盐岩层间岩溶表层风化带和垂向渗流带地震剖面特征

      Fig.  5.  Seismic profile characteristics of interlayer karst surface weathering zone and vertical seepage zone in Beikang Basin in southern South China Sea

      图  6  北康盆地不整合岩溶储层识别特征

      Fig.  6.  Seismic identification characteristics of karst reservoirs in Beikang Basin, southern South China Sea

      图  7  南海南部南康台地碳酸盐岩白垩化作用形成大量孔隙(据Rahman et al., 2011

      Fig.  7.  The carbonate rocks of the Nankang platform in the southern South China Sea formed a large number of pores through chalkization(from Rahman et al., 2011)

      图  8  曾母盆地南康台地碳酸盐岩储层储集空间类型及特征

      Zampetti et al.(2003)Vahrenkamp et al.(2004). a. 亮晶生物碎屑灰岩,Jintan-3井,1 682.75 m,见大的生物碎粒内溶孔与小的粒内溶孔呈网状相连;b. 亮晶生物碎屑灰岩,Jintan-3井,1 830 m,泥质含量少,见生物碎屑内的结构空腔;c. 亮晶生物碎屑灰岩,发育生物礁碎屑的粒内溶孔;d. 细晶白云岩,见残余阴影,粒间孔和粒间溶孔发育;e. 泥晶颗粒灰岩,裂缝中见亮晶方解石胶结;f. 亮晶颗粒灰岩,见缝合线及次生溶孔

      Fig.  8.  The types and characteristics of carbonate reservoirs at Nankang platform of Zengmu Basin

      图  9  南海南部曾母盆地南康台地白云石特征(据Wilson et al., 2013

      Fig.  9.  The characteristics of dolomite formed by recrystallization of Nankang platform at Zengmu Basin in southern South China Sea(from Wilson et al., 2013)

      图  10  南海南部曾母盆地南康台地Mega碳酸盐台地及流体活动(据Vahrenkamp et al., 2004修改)

      Fig.  10.  Mega carbonate platform and fluid flow at Nankang platform of Zengmu Basin in the southern South China Sea (modified after Vahrenkamp et al., 2004)

      图  11  北康盆地中新世碳酸盐台地分布及有利储集区预测

      Fig.  11.  Distribution of the Miocene carbonate platform and prediction of favorable reservoir areas in Beikang Basin

      图  12  北康盆地碳酸盐岩油气藏预测模式

      Fig.  12.  The prediction model of carbonate reef hydrocarbon reservoir in Beikang Basin

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    • 收稿日期:  2021-09-30
    • 网络出版日期:  2022-07-29
    • 刊出日期:  2022-07-25

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