西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

流花11 – 1 生物礁油田底水快速锥进研究

刘明全1,2,冯全雄2 *,肖为3,吴其林3,但志伟3   

  1. 1. 中国地质大学(武汉)资源学院,湖北武汉430074;2. 中国海洋石油国际有限公司,北京东城100010;
    3. 中海油能源发展钻采工程研究院地球物理研究所,广东湛江524057
  • 出版日期:2015-04-01 发布日期:2015-04-01
  • 通讯作者: 冯全雄,E-mail:fengqx@cnooc.com.cn
  • 基金资助:

    国家科技重大专项(2008ZX05025)。

Fast Coning of Bottom Water in Bioherm Oilfield of LH11 – 1

Liu Mingquan1,2, Feng Quanxiong2*, Xiao Wei3, Wu Qilin3, Dan Zhiwei3   

  1. 1. School of Resources,China University of Geosciences(Wuhan),Wuhan,Hubei 430074,China
    2. CNOOC International Limited,Dongcheng,Beijing 100010,China
    3. CNOOC EnerTech Drilling Engineering Geophysics Institute,Zhanjiang,Guangdong 524057,China
  • Online:2015-04-01 Published:2015-04-01

摘要:

流花11 – 1 生物礁油田是中国新近系目前发现的最大整装型生物礁油田,油田开发期间在不同构造部位的油
井含水上升速度不同,前人已对油田含水地质因素进行分析,但对油田含水上升迅速的源头认识不足,严重制约了油
田的采收。将层序地层学理论、碳酸盐岩成岩作用机理和构造运动相结合,平面上依靠高分辨率三维地震资料条件下
利用叠前AVO 反演的G 属性所刻画的油水界面平面展布图,纵向上依靠叠前同步反演获得的vp=vS 剖面图和密度转
换的孔隙度剖面图,发现了多处底水刺穿油水界面形成的上窜通道,有力地论证了17.5 Ma 和16.5 Ma 层序界面附近
暴露时产生的溶洞、溶缝及东沙运动产生的裂缝为流花11 – 1 生物礁油田底水快速锥进的源头,其中溶洞为主要底水
上窜通道。

关键词: 生物礁油田, 底水锥进, 地质成因, AVO, 叠前同步反演, 喀斯特化

Abstract:

Up to now,the bioherm oilfield of LH11 – 1 is the largest uncompartmentalized one in tertiary systems in China.
In the developing period,the water cut in the different formations and structures is rising at various velocities. Although field
water-composing geological factors were analyzed before,there is still lack of understanding and recognition on the sources
of fast water-cut rise,which might severely restrict oil recovery. By the combination of sequence stratigraphy,carbonate rock
diagenesis mechanism and tectonic movement,horizontally referring to the oil-water interface planar layouts featured by G
attributes of AVO pre-stack inversion under the condition of high resolution 3-D seismic data,and vertically considering the
vp=vS obtained through pre-stack simultaneous inversion and the porosity profile of density conversion,the authors find the
ascending channels formed by multiple bottom-water piercing oil-water interface,convincingly verifying that the Karst caves
and seams created when the nearby areas surrounding the sequence interfaces between 17.5Ma and 16.5Ma get exposed,and
the fractures formed by Dongsa movement are the three sources for Fast Coning of Bottom Water in the bioherm Oilfield of
LH11 – 1. Among them,the Karst caves are the major ascending channels.

Key words: bioherm oilfield, bottom water coning, geological factors, AVO, pre-stack simultaneous inversion, karstlization