[1]赵培强,陈阵,李卫兵,等.基于介电测井和电阻率测井的致密砂岩储层饱和度联合反演方法[J].测井技术,2022,46(02):174-181.[doi:10.16489/j.issn.1004-1338.2022.02.009]
 ZHAO Peiqiang,CHEN Zhen,LI Weibing,et al.Joint Inversion of Saturation of Tight Sandstone Reservoirs Using Resistivity and Dielectric Logs[J].WELL LOGGING TECHNOLOGY,2022,46(02):174-181.[doi:10.16489/j.issn.1004-1338.2022.02.009]
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基于介电测井和电阻率测井的致密砂岩储层饱和度联合反演方法()
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《测井技术》[ISSN:1004-1338/CN:61-1223/TE]

卷:
第46卷
期数:
2022年02期
页码:
174-181
栏目:
解释评价
出版日期:
2022-05-01

文章信息/Info

Title:
Joint Inversion of Saturation of Tight Sandstone Reservoirs Using Resistivity and Dielectric Logs
文章编号:
1004-1338(2022)02-0174-08
作者:
赵培强12 陈阵3 李卫兵3 毛志强12 柯式镇12 王海朋4
(1.中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249; 2.中国石油大学(北京)地球探测与信息技术北京市重点实验室, 北京 102249; 3.中国石油长庆油田公司勘探开发研究院, 陕西 西安 710018; 4.中国石油集团测井有限公司辽河分公司, 辽宁 盘锦 124010)
Author(s):
ZHAO Peiqiang12 CHEN Zhen3 LI Weibing3 MAO Zhiqiang12 KE Shizhen12 WANG Haipeng4
(1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China; 2. Beijing Key Laboratory of Earth Prospecting and Information Technology, China University of Petroleum(Beijing), Beijing 102249, China; 3. Exploration and Development Research Insititute, PetroChina Changqing Oilfield Company, Xi’an, Shaanxi 710018, China; 4. Liaohe Branch, China National Logging Corporation, Panjin, Liaoning 124010, China)
关键词:
致密砂岩 饱和度 介电测井 电阻率测井 联合反演 粒子群算法
Keywords:
tight sandstone saturation dielectric logs resistivity logs joint inversion particle swarm optimization
分类号:
P631.84
DOI:
10.16489/j.issn.1004-1338.2022.02.009
文献标志码:
A
摘要:
鄂尔多斯盆地三叠系延长组致密砂岩储层具有地层水矿化度变化大、孔隙结构复杂、泥质含量较高等特点,含油饱和度评价困难。然而,致密储层钻井液侵入较浅,且多频介电测井蕴含地层水矿化度等信息,为饱和度评价提供了有利条件。基于阵列感应电阻率曲线以及介电测井4种频率的介电常数曲线和电导率曲线,提出一种联合电阻率测井和介电测井信息反演储层含油饱和度的方法。根据储层性质选择模型构建目标函数,电阻率测井响应采用西门杜方程,介电测井1 GHz频率下测量的介电常数和电导率使用复折射率模型,20~500 MHz频率测量的介电常数和电导率采用泥质砂岩响应模型。利用粒子群优化算法对目标函数进行寻优反演,并构建实例检验算法。将该方法应用于目标储层,获得饱和度、水相曲折度指数、冲洗带矿化度及泥质频散项体积含量。结果显示理论测井响应曲线和实际测井曲线的相对误差小于10%,计算的含油饱和度与岩心分析、试油数据吻合较好,表明该方法反演的参数结果有效、可靠,具有推广应用价值。
Abstract:
The tight sandstone reservoirs of Yanchang formation of Triassic in Ordos basin are characterized by large variation of formation water salinity, complex pore structure, and high shale content, which makes it difficult to evaluate oil saturation. The shallow mud invasion in tight reservoir, and water salinity indicated by multi-frequency dielectric logs provide a feasible method for saturation evaluation. Based on the array induction resistivity logs and the permittivity and conductivity logs of dielectric logging at four frequencies, a joint inversion method for reservoir oil saturation by resistivity and dielectric logs is proposed. Response equations are chosen to construct the misfit function based on reservoir properties. Simandoux equation is used for resistivity log. Complex refractive index model is used for permittivity and conductivity measured from dielectric logging at 1 GHz, and shaly sandstone model is used for permittivity and conductivity from dielectric logging in 20~500 MHz frequency band. The particle swarm optimization(PSO)algorithm is used to optimize the objective function, and examples are constructed to test the algorithm. The method is applied to the target reservoir to obtain saturation, tortuosity index of water phase, salinity of flushing zone, and volume content of shale dispersive phase. The results show that the relative error between the synthetic log response and the measured log is less than 10%, which indicates that the inversion parameters of this method are effective and reliable. Furthermore, the calculated oil saturation is in good agreement with the core analysis and oil test data, which verifies the accuracy of the method. This method has the value of popularization and application.

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金“含导电矿物页岩油储层兆赫兹频段介电响应机理及饱和度评价”(42004087)
第一作者: 赵培强,男,1988年生,副教授,博士,从事岩石物理与测井储层评价。E-mail:pqzhao@cup.edu.cn
更新日期/Last Update: 1900-01-01