摘要
珠江口盆地文昌A凹陷低对比度储层电性与含油气性关系复杂,气、水层测井响应特征接近,仅用常规测井识别流体性质较困难。为了准确识别该类气藏流体性质,以相渗资料、毛细管压力等实验数据为基础,通过不同含水饱和度下的相渗模型及分流率方程,建立了水气比的计算模型,结合生产动态及测试资料,建立了水气比流体的识别标准,并依据该标准确定了文昌A凹陷储层流体性质。结果表明:①计算水气比与实际生产数据符合度高,流体解释结果准确率达到92%,有效地提高了低对比度储层流体识别的准确率;②生产测试资料对该方法流体性质识别的准确性起决定作用。该方法有利于同类储层的开发。
The electrical properties of low contrast reservoir in Wenchang A sag in the Pearl River Mouth Basin have a complicated relationship with oil and gas properties.The logging response characteristics of gas and water layers are similar,so it is difficult to identify fluid properties only by conventional logging.In order to accurately identify the fluid properties of this type of gas reservoir,based on the phase permeability data,capillary pressure and other experimental data,the calculation model of the water-gas ratio was established through the phase permeability model under different water saturations and the diversion rate equation.Combined with production and test data,the identification standard of fluid with different water-gas ratio was established,and the reservoir fluid properties of Wenchang A sag were determined according to this standard.The results show that:(1)The calculated water-gas ratio is highly consistent with the actual production data,and the accuracy of the fluid interpretation results reaches 92%,which effectively improves the accuracy of fluid identification in low-contrast reservoirs.(2)The production test data plays a decisive role in the accuracy of the fluid property identification.This method is beneficial to the development of similar reservoirs.
作者
赵军
韩东
何胜林
汤翟
张涛
ZHAO Jun;HAN Dong;HE Shenglin;TANG Di;ZHANG Tao(School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China;Research Institute of Zhanjiang Company,CNOOC,Zhanjiang 524057,Guangdong,China)
出处
《岩性油气藏》
CSCD
北大核心
2021年第4期128-136,共9页
Lithologic Reservoirs
基金
中海石油(中国)有限公司湛江分公司科技项目“文昌9、10区低孔低渗储层测井精细评价及潜力分析”(编号:CCL2019ZJFN0823)资助。
关键词
低对比度
水气比
含水饱和度
流体识别
测井响应
珠江口盆地
low contrast
water-gas ratio
water saturation
fluid identification
logging response
Pearl River Mouth Basin
