IMECH-IR  > 流固耦合系统力学重点实验室
Application of acoustic emission, anisotropy of acoustic velocity and palaeomagnetie technology to determine in-situ stress in tight sands
Shi X1; Yang L(杨柳)2; Han QR3
2017
会议名称4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017
会议日期May 10, 2017 - May 13, 2017
会议地点Jeju, Korea, Republic of
会议录名称4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017
页码30-34
摘要In-situ stress is an important basic parameter for well path optimization, hydraulic fracturing design, sand control and safe drilling mud window design. Tradition in-situ stress determination methods include lab and field tests. laboratory in-situ stress experiments became more and more sophisticated by incorporating methods known from disciplines like seismology, acoustic emission and non-destructive testing. However, most of lab in-situ stress experiments such as differential strain analysis, and acoustic emission et al., only can only judge in-situ stress magnitude or orientation. Moreover, it’s expensive and time-consuming for core samples preparation, processing and conduct in-situ stress experiments. Therefore, improve experimental accuracy and speed with low cost is highly desirable. In this paper, the combination of acoustic emission, anisotropy of acoustic velocity and palaeomagnetie technology to determine in-situ stress magnitude and orientation is proposed. Anisotropy of acoustic velocity method is applied to determine the direction of the maximum principle stress with respect to the master orientation line. The geographic orientation of cores is calibrated by using viscous remanent magnetization component. Then, the geographic orientations of the maximum and minor principal in-situ stresses are determined, which can guide the direction of drilled cores in following acoustic emission experiments. The in-situ stress measurement using Kaiser effect in maximum and minimum principal in-situ stress direction under confining pressures with the same depth was performed, which can simulate the original in-situ stress condition of rock samples and decrease the number of drilled cores. Eight in-situ stress test points at different depth in tight sands of Changqing oilfield, Ordos Basin, China are examined to validate the accuracy of this approach. The results demonstrate that the calculated results based on the experiments are in good accordance with mini-frac measurements, which provide a good tool for drilling and hydraulic fracturing stimulation design. © 2017 by Korean Society for Rock Mechanics.
关键词Acoustic emission testing Acoustic wave velocity Acoustic wave velocity measurement Anisotropy Core drilling Core samples Hydraulic fracturing Infill drilling Magnetization Rock mechanics Rocks Sand consolidation Stress measurement Stresses Acoustic velocity methods Confining pressures Geographic orientations In situ stress measurement Kaiser effect Non destructive testing Ordos basin , China Remanent magnetization
ISBN号9791156103158
收录类别EI
语种英语
文献类型会议论文
条目标识符http://dspace.imech.ac.cn/handle/311007/78009
专题流固耦合系统力学重点实验室
作者单位1.China University of Petroleum (Huadong), Qingdao; Shandong, China;
2.Institute of Mechanics, Chinese Academy of Sciences, Beijing, China;
3.CNPC Changqing oilfiled, Xi’an; Shanxi, China
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GB/T 7714
Shi X,Yang L,Han QR. Application of acoustic emission, anisotropy of acoustic velocity and palaeomagnetie technology to determine in-situ stress in tight sands[C],2017:30-34.
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