摘要
目前砂质辫状河隔夹层的研究多依靠钻井资料和生产动态资料,而渤海LD2X油田厚层砂质辫状河储层仅有6口探井及品质较差的地震资料,隔夹层展布特征研究难度较大。为解决此难题,首先,利用录井、测井资料,统计分析了不同成因隔夹层的岩性及测井响应特征,建立了隔层、夹层的识别标准;其次,地球物理正演模拟及实际资料统计表明,厚层砂岩中泥岩隔夹层厚度越大,地震反射振幅越强,利用地震属性确定了主力泥岩隔夹层的平面展布特征;最后,通过压力系数与海拔反比例函数关系判别泥岩上部、下部砂体是否为同一压力系统,从而判别泥岩是隔层还是夹层。结合研究成果,综合分析了油田主力隔夹层的平面分布特征及是否能够分割流体系统。
Most scholars rely on drilling data and production data for the study of sandy braided river interlayers,however,there are only six wells and poor quality seismic data from LD2X oilfield of Bohai,it is difficult to study the distribution characteristics of the interlayers.In this paper,firstly,the sedimentary genesis of the interlayers are analyzed and classified,the lithology and logging response characteristics of different interlayer are analyzed,and the discriminative templates of the interlayers are established.Secondly,the geophysical forward modeling and actual data show that the thicker the mudstone intercalation in thick sandstone is,the stronger the seismic reflection amplitude is.The plane distribution characteristics of the main mudstone intercalation are determined through the seismic attributes.Finally,the static pressure data are used to study the inverse proportional function relationship between the pressure coefficient and the altitude in the reservoir to determine whether the upper and lower sand bodies of the interlayer are a unified pressure system,thereby discriminating the interlayer.Combining the above research results,the plane distribution characteristics of the main interlayer of the oilfield and whether the fluid system can be divided are comprehensively analyzed.
作者
朱建敏
达丽亚
高红立
施淳元
朱琴
ZHU Jianmin;DA Liya;GAO Hongli;SHI Chunyuan;ZHU Qin(Tianjin Branch Company of CNOOC Ltd.,Tianjin 300459,China)
出处
《断块油气田》
CAS
CSCD
北大核心
2020年第6期739-744,共6页
Fault-Block Oil & Gas Field
基金
国家科技重大专项课题“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058-001)。
关键词
稀井网
压力系数
隔夹层
砂质辫状河
渤海油田
less well conditions
pressure coefficient
interlayers
sandy braided river reservoirs
Bohai Oilfield
