摘要
针对利用老井资料难于进行水淹层快速评价的问题,采用建立目的层段含水率和电阻率之间的关系来实现老井水淹状况评价的研究思路。针对同一类型沉积砂体,通过统计该砂体开发过程中不同历史阶段的测井资料,利用各井初始电阻率和初始含水率建立该沉积类型砂体的含水率和电阻率关系经验公式,从而利用阿尔奇公式计算老井现在的剩余油饱和度,进而提出了以老井含水率和电阻率为基础的一种老井水淹状况快速解释方法。在方法确立的基础上,以具有三十多年开发历史的ZW油田为例,在典型区块ZW12断块E2s16砂组开展了老井水淹程度判别。并通过密闭取心井ZJ1和ZJ4井取心段含油饱和度的计算,对该方法的准确性进行了验证,证明该方法在快速定性—半定量判别高含水油藏老井水淹状况方面具有较高的实用性。
The evaluation of water flooded layer using the old data is very difficult in high water cut reservoir.In this research,the idea of establishing the relationship between water content and resistivity in target section to realize the evaluation of old wells under water flooded condition was adopted.For the same type of depositional sand body,the initial resistivity and initial water content was picked up from the drilling data of the sand body in different historical stages during the development to establish the empirical formula for the relationship between water content and resistivity.And then,the current remaining oil saturation of the old wells could be calculated by the Archie formula.Therefore,a rapid interpretation method for old wells under water flooded condition based on the water content and resistivity was put forward.Based on the new method,the ZW Oilfield with more than 30 years of development history was chosen as the example.The evaluation of the water flooded degree of old wells in the 6th sand group of first member of Sanduo Formation in the typical block,ZW12 fault block,was made.Meanwhile,through the calculation of the oil saturation of the closed coring wells,well-ZJ1 and well-ZJ4,the accuracy of this method was verified.It was proved that this method has high practicability in the rapid qualitative—semi-quantitative evaluation of old wells in high water cut reservoir under the water flooded condition.
作者
黄帅
梅海燕
HUANG Shuai;MEI Haiyan(Petroleum Engineering School,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Material Supply Department,Sinopec Jiangsu Oilfield Company,Yangzhou,Jiangsu 225009,China)
出处
《油气藏评价与开发》
CSCD
2019年第6期47-50,共4页
Petroleum Reservoir Evaluation and Development
关键词
高含水油藏
含水率
电阻率
老井水淹评价
ZW12断块
三垛组
high water cut reservoir
water content
resistivity
evaluation of old wells under water flooded condition
ZW12 fault block
Sanduo Formation
