摘要
枣园油田中生界孔缝型油藏岩性以安山岩为主,探明地质储量1355.87×10^(4) t,随着开发的不断深入,已进入开发高含水阶段,后续的进一步开发有着较大的难度。本文综合应用岩心、测井、地震等静态资料以及动态数据,分析了枣园油田孔缝型油藏单井产能特征及其差异的控制因素,并制定了研究区目的层产能评价标准。研究区储集空间主要以次生溶蚀孔隙为主,裂缝则起到沟通孔隙的作用。经过分析表明,研究区单井产能与岩相具有较好的相关关系,其中爆发相和溢流相是主要储层;除此以外,产能与储层厚度以及裂缝发育呈正相关关系;油柱高度和后期措施也对单井的产能有着较大影响。通过开展油藏单井产能特征研究,总结研究区出3种单井产能类型及分类标准:Ⅰ类产能稳定递减型、Ⅱ类产能迅速递减型、Ⅲ类低产或无产能型。Ⅰ类单井钻遇储层厚度大于70 m,岩相为爆发相和溢流相;单井油柱高度大于150 m,方差属性值大于0.6。Ⅱ类单井钻遇储层厚度为35~70 m,岩相为溢流相;单井油柱高度为90~150 m,方差属性值为0.15~0.6。Ⅲ类单井钻遇储层厚度小于35 m,岩相为溢流相;单井油柱高度小于90 m,对应方差属性小于0.15。单井产能差异的控制因素研究对油田确定储层有利区以及下一步油井的部署和开发具有一定的指导意义。
The Mesozoic volcanic reservoir in Zaoyuan oilfield is mainly composed of andesite,with proven reserves of 1355.87×10^(4) t.With the deepening of development,it has entered the high water-cut period,and the further development has great difficulty.Taking the Andesite reservoir of Zaoyuan oilfield as an example,this paper analyzes the productivity characteristics of single well and the controlling factors of its differences by comprehensively applying static and dynamic data such as core,well logging and seismic data,and establishes the productivity evaluation standard of the target layer in the study area.The volcanic reservoir space in this area is mainly dominated by secondary dissolution pores,and fractures play a role of communication pores.The analysis shows that there is a good correlation between the productivity of volcanic rock well and lithofacies in this area,in which the outburst phase and overflow phase are the main reservoirs.In addition,productivity is positively correlated with reservoir thickness and fracture development.Column height and post-production measures also have a significant impact on the productivity of a single well.Through the research on the productivity characteristics of single well in reservoir,this paper summarizes three types of single well productivity and classification standards in this area:class Ⅰ stable declining productivity type,class Ⅱ rapidly declining productivity type,and class Ⅲ low production or proletarian productivity type.Class Ⅰ single well was drilled with a reservoir thickness greater than 70 m,and the lithofacies was outburst phase and overflow phase.The height of single well oil column is greater than 150 m,and the variance attribute value is greater than 0.6.Class Ⅱ single well is drilled with reservoir thickness of 35~70 m and the rock facies is overflow facies.The height of single well oil column is 90~150 m,and the value of variance attribute value is 0.15~0.6.Class Ⅲ single well was drilled with reservoir thickness less than 35 m,and the rock facies was overflow facies.The height of single well oil column is less than 90 m,and the value of corresponding variance attribute is less than 0.15.The controlling factors of single well productivity difference in volcanic reservoir have certain guiding significance for oilfield to determine favorable reservoir area and oil well deployment and development in the next step.
作者
季岭
刘钰铭
郭小龙
王飞
张容基
孙建
鲍磊
JI Ling;LIU Yuming;GUO Xiaolong;WANG Fei;ZHANG Rongji;SUN Jian;BAO Lei(Dagang Oilfield Company of PetroChina,Cangzhou 061000,China;China University of Petroleum-Beijing,Beijing 102249,China)
出处
《石油科学通报》
2021年第4期566-575,共10页
Petroleum Science Bulletin
基金
国家自然科学基金(42172154、42072146)
中国石油大学(北京)科研基金(2462020YXZZ022)联合资助。
关键词
火山岩油气藏
产能特征
主控因素
中生界
岩相
安山岩
volcanic rocks reservoirs
productivity characteristics
main controlling factors
Mesozoic
lithofacies
andesite
