2016年12月第35卷第6期
大庆石油地质与开发
Petroleum Geology and Oilfield Development in Daqing
DOI:10.3969/J.ISSN.1000-3754.2016.06.028
长期注水对井周储层物性影响试验
杜文娟
（大庆油田有限责任公司测试技术服务分公司，黑龙江大庆
163453）
Dec.，2016 Vol. 35 No. 6
摘要：注水井经过长期高压注水，其周围储层物性会发生不同程度的变化。利用套前、套后的自然伽马测井曲线，评价地层泥质含量的变化情况；在套管井中进行双源距补偿中子测井和交叉偶极阵列声波测井确定地层目前的孔隙度，与裸眼井的孔隙度对比，定量评价地层孔隙度的变化情况；进行压力降落测试确定地层的有效渗透率，与以前的试井分析结果对比，评价有效渗透率的变化情况；进行脉冲中子全谱测井确定储层目前含水饱和度，分别与原始和完井时的含水饱和度对比，
，评价含水饱和度的变化情况。通过3口井现场试验得出：在非
射孔层位以及射孔非主力生产层位，注水井长期高压注水对储层物性影响较小；在射孔的主力生产层位，注水井长期高压注水对储层物性的影响较大，当孔隙度变化量大于4%，含水饱和度高于90%，关井初期地层压力降落幅度大、速度快，有效渗透率明显变大时，主力吸水层位已形成注水优势通道，需要采取封堵措施。研究成果为油田水淹层解释、下步综合治理、实现精细注水提供了依据。
关键调：注水井；测井；泥质含量；孔隙度；渗透率；含水饱和度；大孔道
中图分类号：P631
文献标识码：A
文章编号：1000-3754（2016）06-0148-07
INFLUENCESTESTOFTHELONG-TERMWATERINJECTION
ONTHERESERVOIRPHYSICALPROPERTIESAROUNDTHEWELL
DUWenjuan
(Logging & Testing Seruice Branch Company of Daqing Oifield Co. Lid., Daqing 163453, China)
Abstract: After a long period of the high-pressure water injection, the reservoir physical properties around the in-jection well have been changed with different degrees.With the help of the natural gamma logging curves of the open hole and case hole, the changes of the shale content have been evaluated; the current porosities are deter-mined by the dual-spaced compensated neutron logging and cross dipole array acoustic logging in the case hole, and moreover comparing with the porosities in the open hole, the changes of the formation porosity are quantitatively cal-culated; the formation effective permeabilities are ensured by the pressure drop test, and furthermore comparing with the analyzed results of the previous well test, the variations of the effective permeability are evaluated; the cur-rent water saturations of the reservoirs are assessed and made sure by pulse neutron full spectrum logging, and then comparing with the original and ones at the stage of well completion, the changes of the water saturation are evalua-ted. The field tests of the three wells show that for the non-perforation layers and perforated less-important produc-tion layers, the influences of the long-period high-pressure water injection on the reservoir physical properties are greatly smaller; for the main perforated production layers, the influences are rather serious, when the change of the
收稿日期：2015-11-27
改回日期：2016-05-27
基金项目：国家科技重大专项（2011ZX05020-007)
作者简介：杜文娟，女，1971年生，助理工程师，主要从事油田测井科研工作。
E-mail; dlts_duwj@ petrochina. com. cn
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