新窑东区长4+5-长6储层宏观非均质性定量表征  

Quantitative Characterization of Macroscopic Heterogeneity of Chang 4+5-Chang 6 reservoir in Xinyao East Area

作　　者：韩伟 Han Wei(Nanniwan Oil Production Plant,Yanchang Oilfield Co.,Ltd.,Yan an 716000,China)

机构地区：[1]延长油田股份有限公司南泥湾采油厂,陕西延安716000

出　　处：《云南化工》2023年第9期133-135,共3页Yunnan Chemical Technology

基　　金：延长石油集团重点研发项目“东部老油区潜力分析及挖潜方向先导研究”(ycsy2021ky-A-09)。

摘　　要：新窑东区目前处于注水开发中期,注水矛盾突出,亟需厘清注水开发中波及程度、层间干扰及单层突进形成的地质因素。利用区内电测曲线统计区内储层层间、层内及平面多维度非均质程度,并绘制直观图表。结果表明:区内分层系数、砂岩密度以及隔层分布基本均匀,其中长4+522的层间非均质性最强;区内变异系数、突进系数以及极差综合显示该区主要层段达到了层内中等非均质程度;本区长4+5时期,三角洲呈退积式发育,砂体隔层发育在分流河道间;长6时期砂体连通性、连续性较好,河道间隔层不发育。通过定量表征长4+5-长6储层宏观非均质性,深化储层内部结构认识,理清注水开发矛盾的深层次原因。At present,Xinyao East District is in the middle stage of water injection development,and the contradiction of water injection is prominent.It is urgent to clarify the geological factors that affect the extent of water injection,interlayer interference and the formation of single-layer intrusion.Use the electric logging curve in the area to count the degree of multi-angle heterogeneity between layers,within layers and in plane of the reservoir in the area and draw an intuitive chart.The results show that the stratification coefficient,sandstone density and interlayer distribution are basically uniform in the area,but in general,the interlayer heterogeneity of Chang 4+522 is the strongest;The coefficient of variation,the coefficient of protrusion and the range in the area show that the main interval in the area has reached the level of medium heterogeneity in the layer;The sand body in Chang6 period in this area has good connectivity and continuity,and the channel interval is not developed.During the period of Chang 4+5,the delta developed retrogradation,and the sand body interlayer developed between the distributary channels.Through the macroscopic quantitative characterization of the macroscopic heterogeneity of Chang 4+5-Chang 6 reservoir,deepen the understanding of the internal structure of the reservoir,and clarify the deep-seated causes of the contradiction between water injection and development.

关 键 词：南泥湾油田 层内非均质性 层间非均质性 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]