Data Interpretation and Stress Calculations in Hydraulic Fracturing Measurements

水力压裂测量中的数据解释和应力计算

• 批准号: 8720990
• 负责人: Bezalel Haimson
• 金额: $ 12.18万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-01 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8720990&HistoricalAwards=false
• 关键词: Data; Interpretation; Stress; Calculations; Hydraulic

The hydrofracturing method of in situ stress measurements has evolved in the last fifteen years into an indispensable tool in geophysical research. For example, a major objective of the first deep scientific drilling in the U.S. at Cajon Pass, California, is to measure the state of stress, primarily by hydrofracturing, in the vicinity of the San Andreas fault. Despite the general reliability of hydrofracturing, uncertainties in its interpretation still exist and cases where the method is only partially successful or totally unsuccessful are now surfacing. There are at least three major sources of difficulties in hydrofracturing data interpretation: 1) reading the correct pressures from field records, 2) using the correct model for calculating the in situ stresses and 3) evaluating the effect of preexisting fractures on hydrofrac pressures and directions. The research will resolve some of these difficulties through laboratory testing and data analysis. In addition, experimental verification of suggested innovative improvements of the method has been carried out. Such confirmation of one or more of these alternate techniques would enable their use in either complementing replacing conventional hydrofracturing.

水压致裂法测量地应力， 在过去的15年里，它已经发展成为一种不可或缺的工具， 地球物理研究 例如，第一个主要目标 在美国加州的卡洪山口进行的深层科学钻探， 测量应力状态，主要是通过水力压裂， 圣安德烈亚斯断层附近 尽管普遍 水力压裂的可靠性， 解释仍然存在，并且该方法仅 部分成功或完全失败的情况正在浮出水面。 至少有三个主要的困难来源， 水力压裂资料解释：1）阅读正确的 根据现场记录的压力，2）使用正确的模型 计算地应力; 3）评价 预先存在的裂缝对水力压裂压力和方向的影响。 的 研究将解决其中一些困难， 实验室测试和数据分析。 此外，实验 验证对方法提出的创新改进 已执行。 对其中一个或多个的确认 替代技术将使它们能够用于 补充替代常规水力压裂。