摘要
砂砾岩储层经过长期注水开发后产层大多发生水淹.本文以哈萨克斯坦Aryskum油田M-Ⅱ层的中孔隙度、中渗透率砂岩储层为例,总结了该区域水淹层电阻率特征、自然电位特征以及自然伽马特征;在水淹层测井响应基础上,开展了水淹层的定性识别研究;并首次提出栅状图结合生产数据的方式对水淹层进行分析.结果表明:油层水淹后电阻率明显降低,自然电位异常幅度明显降低,但自然伽马变化不大;阵列感应测井的减阻入侵以及深电阻率与补偿中子的曲线重叠法能有效识别水淹层,其中深电阻率与中子曲线负异常幅度越大,储层水淹情况越严重.通过南区注水井AR114及其波及区和北区注水井AR7井及其波及区的栅状图法水淹状况分析后,发现其邻井严重水淹,产水率持续升高,说明了这两口注水井对相邻井油层水淹直观影响.总的来说,存在的大量注水井使得Aryskum油田储层严重水淹,新井投产即高含水.
Most of the glutenite reservoirs are flooded after longterm water injection development.Taking the medium porosity and medium permeability sandstone reservoir of M-Ⅱlayer in Aryskum oilfield as an example,this paper summarizes the resistivity characteristics,natural potential characteristics and natural gamma characteristics of the water-flooded layer in this area.Based on the logging response of the water-flooded zone,this paper carried out the research on the qualitative identification of the water-flooded zone;and for the first time proposed the method of grid graph combined with production data to analyze the water-flooded zone.The results show that the resistivity of the oil layer is significantly reduced after water flooding,and the abnormal amplitude of the spontaneous potential is significantly reduced,but the natural gamma has little change.At the same time,the drag reduction invasion of array induction logging and the curve overlap method of deep resistivity and compensated neutron can effectively identify the water flooded layer,and the smaller the negative anomaly amplitude of deep resistivity and neutron curve is,the more serious the reservoir water flooded is.Through the analysis of the water flooded condition of AR114 well and its swept area in the south area and AR7 well and its swept area in the north area,it is found that the adjacent wells are seriously flooded and the water production rate continues to increase,indicating that the two injection wells have an intuitive impact on the water flooded of the adjacent wells.In general,the existence of a large number of water injection wells has caused serious flooding of the Aryskum oilfield reservoirs,and new wells have been put into production with high water cut.
作者
陈鑫
范翔宇
王兆峰
戴雄军
陈科贵
刘卉
CHEN Xin;FAN XiangYu;WANG ZhaoFeng;DAI XiongJun;CHEN keGui;LIU Hui(School of Earth Science and Technology,Southwest Petroleum University,Chengdu 610500,China;PetroChina International Exploration and Development Corporation,Beijing 100032,China;Central Asia Oil and Gas Research Institute,Exploration and Development Research Institute of Xinjiang Oilfield Company,Karamay 834000,China;Chengdu North Petroleum Exploration and Development Technology Co.,Ltd.,Chengdu 610500,China)
出处
《地球物理学进展》
CSCD
北大核心
2022年第2期561-569,共9页
Progress in Geophysics
基金
国家自然科学基金项目“四川盆地油钾兼探的地球物理评价方法研究”(41372103)资助.
关键词
储层评价
水淹层
地球物理测井
栅状图
工作案例
Reservoir evaluation
Water-flooded layer
Geophysical well log
Grid diagram
Work case
