摘要
渤海湾盆地J油田古近系发育扇三角洲沉积,储层横向变化快,南北井区储层特征差异大.对储层模式的认识由ODP阶段的“泛联通体”变为钻后的“多期砂体”,动用储量发生巨大变化.对扇三角洲储层沉积模式的认识程度严重制约该油田的开发.针对上述问题,基于该油田多井资料,采用井-震联合技术路线,建立了开发尺度下扇三角洲储层沉积模式研究的“三步法”技术体系：（1）古地貌约束的储层对比方法,（2）扇三角洲沉积控制因素分级解剖技术,（3）基于沉积模式的储层分布规律研究方法.基于该技术体系,在J油田沙三段储层纵向划分3期砂体,平面上两处物源造就南北两处扇体.南区为“断坪式、水进型”沉积模式,沉积坡度缓,储层物性好,北区为“断坡式,水进型”沉积模式,沉积坡度陡,储层物性相对较差.通过对该油田开发尺度下沉积模式的研究,实现了对储层的分布规律的刻画和预测,确立了“洼槽沉积厚,凸起沉积薄;陡坡物性差、缓坡储层优”的沉积控制机理和储层分布规律,对类似地区尤其少井情况下的地质研究具有借鉴意义.
J Oilfield of Bohai Bay Basin develops fan-shaped delta sedimentation in Paleogene, in which the reservoir changes dramatically in lateral direction, and many differences in the reservoir characteristics between south and north oil well area are indicated. Recognition of reservoir model has been changed from a broadly connected body of overall development plan （ODP） to the multi-stage sand body after drilling, which results in the tremendous variation for producing reserves. Consequently, the recognition degree of fan deltas reservoir sedimentary model seriously restricts the oil field development. Considering the above problems, we built three-step study method for sedimentary model of fan-shaped deltas reservoir under development scale： （1） reservoir correlation constrained by paleogeomorphology; （2） hierarchically analytic technique of control factors for fan-shaped deltas sedimentation; （3） research on reservoir distribution based on the sedimentary model. We divide the reservoir of ES3 in J Oilfield into three-stage sand bodies horizontally . There are two provenances that contribute to sand bodies in both south and north directions . The south area belongs to transgressive flat sedimentary model, which is characterized as slow slope and has superior physical property, while the north area belongs to ramp sedimentary model of a steep slope with relatively poor physical property of reservoir . Sedimentation is thick in sagging zone and is thin in the uplift area; and the physical property is poor in ramp and fine in flat . The research has reference values for the geological study of similar survey, especially for the area where there are only few wells.
出处
《中国造船》
EI
CSCD
北大核心
2017年第A01期202-209,共8页
Shipbuilding of China
关键词
古近系
扇三角洲
古地貌
控制因素
沉积模式
paleogene
fan-shaped delta
paleogeomorphology
control factors
sedimentary model
