双侧向测井是确定地层含油性的关键测井资料之一，但由于受各种复杂因素的影响，其测井信息对油气层分辨能力受到限制，给油气层解释带来困难。本文依据电测井理论和快速正演数值计算方法，模拟不同储层条件下双侧向测井响应并分析其特征，从而揭示双侧向测井的影响因素；以此为基础，采用反演算法，对双侧向测井资料进行预处理，计算目的层位的原状地层电阻率、冲洗带电阻率及侵入半径，实现双侧向测井资料的环境校正。实际应用表明，该方法可有效消除双侧向测井的环境因素影响，识别油、气、水层符合率更高，可满足工程需要。
Dual laterolog is a key to determine whether the stratum contains oil or not. However, due to impact of reservoir thickness, thin interbed oil reservoir, mud invasion and other factors, the discrimination capacity for oil and gas layers of the logging information is limited, bringing difficulties for oil and gas layer interpretation. Based on the electrical logging theory and fast forward numerical calculation method, this paper simulatesdual laterolog responseunder different reservoir conditions and analyzes its characteristics, revealing factors influencing the dual laterolog. On this basis, the inversion algorithm was used to carry out preprocessing of the dual laterolog data, calculatethe virgin zone resistivity, flushed zone resistivity and invasion radius, realizingthe environmental correction of dual lateral logging data. Applications show that this method can effectively eliminate environmental influenceon dual laterolog, and identify oil, gas and water layers with high accuracy, meeting engineering demand.
[1] 丁次乾. 矿场地球物理[M]. 东营: 石油大学出版社, 1992: 20-42. Ding Ciqian. Mine geophysics[M]. Dongying: University of Petroleum Press, 1992: 20-42.
[2] 张庚骥. 电法测井(上册)[M]. 北京: 石油工业出版社, 1984: 83-179. Zhang Gengji. Electrical logging[M]. Beijing: Petroleum Industry Press, 1984: 83-179.
[3] 谢关宝. 双侧向测井资料的预处理方法研究[D]. 东营: 中国石油大 学, 2004. Xie Guanbao. Study on the method of dual laterolog data preprocessing[D]. Dongying: China University of Petroluem, 2004.
[4] 冯启宁, 郑学新. 测井仪器原理[M]. 东营: 石油大学出版社, 1991: 10-58. Feng Qining, Zheng Xuexin. Logging instrument principle[M]. Dongying: University of Petroleum Press, 1991: 10-58.
[5] 王智. 测井资料环境校正技术研究及应用[D]. 成都: 西南石油大学, 2006. Wang Zhi. Logging data environment correction technology research and application[D]. Chengdu: Southeast Petroleum University, 2006.
[6] 谢关宝, 范宜仁, 吴海燕, 等. 储层泥浆侵入深度预测方法研究[J]. 测 井技术, 2006, 30(3): 240-242. Xie Guanbao, Fan Yiren, Wu Haiyan, et al. Research of mud invasion depth prediction method in reservoir[J]. Well Logging Technology, 2006, 30(3): 240-242.
[7] 欧阳健, 张建华, 胡启, 等. 渤海湾海水泥浆侵入油气层双侧向测井定 量分析研究[J]. 测井技术, 1998, 22(4): 256-260. Ouyang Jian, Zhang Jianhua, Hu Qi, et al. Quantitative study of dual laterolog response to oil/gas formation invaded by high salinity mud filtrate in Bohai Gulf[J]. Well Logging Technology, 1998, 22(4): 256-260.
[8] 王晓畅. 南堡凹陷复杂油气层测井响应特征与评价方法研究[D]. 东 营: 中国石油大学, 2008. Wang Xiaochang. Study on logging response characteristics and evaluation method of complex reservoir in nanpu sag[D]. Dongying: China University of Petroluem, 2008.
[9] 赵明, 高杰, 孙友国. 常规电测井联合反演研究与实际应用[J]. 测井技 术, 2003, 27(1): 16-19. Zhao Ming, Gao Jie, Sun Youguo. Joint inversion study of conventional electrical logging and its applications[J]. Well Logging Technology, 2003, 27(1): 16-19.
