基于声波信号预测Kaiser应力点的水平地应力

doi:10.11885/j.issn.1674-5086.2020.06.11.01

西南石油大学学报(自然科学版) ›› 2022, Vol. 44 ›› Issue (2): 40-48.DOI: 10.11885/j.issn.1674-5086.2020.06.11.01

基于声波信号预测Kaiser应力点的水平地应力

范翔宇^1,2, 么勃卫³, 张千贵³, 夏宏泉³

1. 西南石油大学地球科学与技术学院, 四川成都 610500;
2. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川成都 610500;
3. 西南石油大学石油与天然气工程学院, 四川成都 610500

收稿日期:2020-06-11 发布日期:2022-04-22
通讯作者: 么勃卫,E-mail:ybwmmd@163.com
作者简介:范翔宇,1975年生,男,汉族,四川成都人,教授,博士,主要从事油气井工程岩石力学与井壁稳定、测井技术在石油工程中的应用、油气井工程地质特征研究及应用。E-mail:swpi_fxy.student@sina.com
么勃卫,1992年生,男,汉族,陕西凤翔人,博士研究生,主要从事油气井工程岩石力学与井壁稳定、测井技术在石油工程中的应用。E-mail:ybwmmd@163.com
张千贵,1982年生,男,汉族,四川金堂人,副教授,博士,主要从事油气井工程岩石力学、非常规天然气开发理论与技术。Email:qgzhang@swpu.edu.cn
夏宏泉,1965年生,男,汉族,陕西武功人,教授,博士,主要从事测录井新方法研究,石油工程岩石力学研究,测井精细解释及工程应用,油气井工程测量与过程控制。E-mail:Hqx3427@126.com
基金资助:
国家自然科学基金（51774246，51474185）；四川省学术和技术带头人培养支持经费资助项目（[2016]183）

Study on the Calculated Method of Horizontal In-situ Stress Based on the Kaiser Stress Point Predicted by Acoustic Signal

FAN Xiangyu^1,2, YAO Bowei³, ZHANG Qiangui³, XIA Hongquan³

1. School of Earth Science and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. School of Petroleum Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2020-06-11 Published:2022-04-22

摘要/Abstract

摘要： 声发射实验测试地应力方法需从地层原位取得的全尺寸岩样上钻取4个小尺寸岩芯，分别进行加载实验下的声发射测定。该方法将造成地层岩样损失，地应力评价成本较高。为此，根据岩石声学性质与力学特性具有较好的相关性特征，基于大量岩石试件的声波时差实验数据和加载条件下的声发射实验数据，构建声波时差与岩样Kaiser应力点的关系模型，并结合岩石声发射实验预测地应力计算模型，建立利用声波信号预测Kaiser应力点的地应力计算方法。而后，结合全尺寸岩芯的360°声波时差扫描数据，利用该方法进行致密油储层地应力预测分析，结果显示：建立的地应力计算方法预测结果相对于Anderson、Eaton、Newberry模型预测结果更接近压裂数据计算的地层应力值。说明该方法相对于传统的测井解释地应力方法更稳定，并且利用全尺寸岩芯360°声波时差扫描数据预测Kaiser应力点相对于声发射实验方法具有更好的经济性。

关键词: 岩石力学, 地应力预测, 声发射实验, Kaiser应力点, 声波时差

Abstract: The in-situ stress evaluation method by acoustic emission tests needs to carry out acoustic emission tests under the loading condition using four small-size cores drilled from a full-scale stratum rock sample. This method will result in the loss of strata rock samples and the high cost for the in-situ stress evaluation. In the present work, a series rock sores were carried out by acoustic emission tests and acoustic emission tests under the loading condition. According to the concept of the good correlation between acoustic properties and mechanical properties of rock, the relational function between acoustic interval transit time and Kaiser Stress Point of rock sample was obtained using the test results. Next, a new calculated method of horizontal in-situ stress based on the Kaiser stress point predicted by acoustic interval transit times using the relational function was developed based on the calculation model of the in-situ stress evaluation method by acoustic emission tests. Furthermore, using the 360° sonic scan data of the full-scale core, the horizontal in situ stress of a tight oil reservoir was evaluated by the new proposed method, as well as the results were compared with the values of in situ stress evaluated by hydraulic fracturing test data. The results show that the values of the horizontal in situ stress calculated by the proposed method have higher accuracy comparing with the results calculated by the models of Anderson, Eaton and Newberry. Therefore, this new proposed method to evaluate the horizontal in situ stress is not only more accurate comparing with the traditional logging interpretation method, but also have higher economy due to that there is no cost on the tests and rock cores loss.

Key words: rock mechanics, in situ stress evaluation, acoustic emission test, Kaiser stress point, acoustic interval transit time

中图分类号:

TE122

范翔宇, 么勃卫, 张千贵, 夏宏泉. 基于声波信号预测Kaiser应力点的水平地应力[J]. 西南石油大学学报(自然科学版), 2022, 44(2): 40-48.

FAN Xiangyu, YAO Bowei, ZHANG Qiangui, XIA Hongquan. Study on the Calculated Method of Horizontal In-situ Stress Based on the Kaiser Stress Point Predicted by Acoustic Signal[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(2): 40-48.

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基于声波信号预测Kaiser应力点的水平地应力

Study on the Calculated Method of Horizontal In-situ Stress Based on the Kaiser Stress Point Predicted by Acoustic Signal

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