套损井与取心井相似井段识别及其岩石力学参数确定方法

发布时间：2018-04-24 11:03

本文选题：弹性模量 + 泊松比　；参考：《石油钻探技术》2017年04期

【摘要】：为了确定老油田岩心样本严重匮乏的高套损率区块岩石静态弹性力学参数(静态弹性模量与泊松比),研究了套损井与取心井相似井段识别及其岩石静态弹性力学参数确定方法。对取心井段的岩心进行岩石力学试验,通过分析该井段测井数据与岩石静态弹性力学参数的相关性,提出了基于组合模量确定静态弹性力学参数的模型;通过分析取心井与套损井测井数据的的相关性,提出了识别取心井与套损井岩石力学参数相似井段的判别准则;建立了通过识别套损井与取心井相似井段来确定套损井段岩石静态弹性力学参数的方法(SIIM)。由试验与计算结果可知:与传统计算模型中动、静态弹性力学参数的相关性相比,考虑有效水平地应力、动态弹性力学参数的组合模量与静态弹性力学参数的相关系数分别提高了10%与20%;取心井与邻近套损井相似井段的识别标准为两井段的声波时差与自然伽马相关系数最大和差值数组标准差最小。研究结果表明,SIIM方法在高套损率区块多井、多井段静态弹性力学参数的确定中具有较高的适用性与准确性,在现场应用中可取得较好的效果。
[Abstract]:In order to determine the static elastic mechanical parameters (static modulus of elasticity and Poisson's ratio) of high casing failure rate block in old oil field, the identification of similar section of casing damage well and coring well and the determination method of static elastic mechanical parameters of rock are studied. The rock mechanics test was carried out on the core of the coring well. By analyzing the correlation between the logging data and the static elastic parameters of the rock, a model of determining the static elastic mechanical parameters based on the combined modulus was put forward. By analyzing the correlation of logging data between coring wells and casing damage wells, a discriminant criterion for identifying similar rock mechanical parameters of coring wells and casing damage wells is proposed. A method for determining static elastic parameters of rock in casing damage well is established by identifying similar well segments of casing damage well and coring well. The experimental and computational results show that the effective horizontal stress is considered in comparison with the correlation of the dynamic and static elastic parameters in the traditional calculation model. The correlation coefficients of dynamic elastic mechanical parameters and static elastic parameters were increased by 10% and 20%, respectively, and the identification standard of similar interval between coring wells and adjacent casing damage wells was the relationship between acoustic moveout and natural gamma phase. The maximum number and the minimum standard deviation of the difference array. The results show that the SIIM method has high applicability and accuracy in the determination of static elastic mechanical parameters in multi-well and multi-well block with high casing damage rate, and can obtain good results in field application.
【作者单位】：中国石油大学(北京)石油工程学院;
【基金】：国家自然科学基金优秀青年科学基金项目“石油工程岩石力学”(编号:51322404)资助
【分类号】：TE311

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