安塞油田水淹层水淹程度划分及物性变化  

Division of water flooding degree and variation of physical properties in flooded layer of Ansai oilfield

作　　者：赵丁丁[1,2] 孙卫[1,2] 李冠男[1,2] 吴育平[1,2] 雒斌[1,2] 

机构地区：[1]大陆动力学国家重点实验室,陕西西安710069 [2]西北大学地质学系,陕西西安710069

出　　处：《石油化工应用》2017年第7期97-103,共7页Petrochemical Industry Application

摘　　要：为了最大限度地提高老油田的动用储量和开发程度,有必要对水淹层进行深入详细的分析与研究。笔者将安塞油田杏河和侯市地区作为研究对象,首先对研究区生产井的水淹级别进行了分类,再者利用真实砂岩微观模型水驱油实验对研究区不同级别水淹层的油水分布状况进行了细致的观察与分析,最后对水淹层物性变化进行了对比。结果表明,杏河和侯市地区综合含水率分别为33.5%,39.55%;研究区高水淹级别模型多为均匀-网状驱替类型;中水淹级别模型一般为网状驱替,少量为指-网状驱替类型;低水淹级别模型多为指-网状驱替;杏河地区注水开发后孔隙度平均增加5.97%左右,渗透率平均增大66.7%,侯市地区水淹层孔隙度略有增加,而渗透率稍有降低。本次研究将为进一步提高老油田的采收率提供重要启示。In order to maximize the utilization and development of the old oilfield, it is necessary to carry out in-depth and detailed analysis and research on the water flooding reservoir.In this paper,the author regards the Xinghe and Houshi areas of Ansai oilfield as the object of study,first,classifying the flooding level of the production area,and uses the real sandstone micro-model water flooding oil experiment.The oil-water distribution condition of different flooding layers in the study area was observed and analyzed in detail. Finally, the changes of physical properties of the water flooding layer were compared.The results showed that the comprehensive water content in the Xinghe and Houshi areas were 33.5 % and 39.55 % respectively.The high flooding level model in the study area is mostly homogeneous-netted flooding types.The medium flooding level model is generally netted displacement,a small amount refers to the type of finger-netted displacement.The low flooding level model mostly refers to the finger-netted displacement.After water injection development of Xinghe area.The average porosity increases by about 5.97 %,the average permeability increases 66.7 %.And the porosity of the flooded area increases slightly in the Houshi area,while the permeability decreases slightly.This study will provide important implications for further improving the recovery of old oilfields.

关 键 词：安塞油田 水淹层 水淹程度 物性变化 

分 类 号：TE311[石油与天然气工程—油气田开发工程]