Planning for Drilling and Installation of Boreholes for Cross Hole Hydrologic Tests in Overpressured Accretionary Complexes

超压增生杂岩中跨孔水文测试的钻孔和安装规划

• 批准号: 0326749
• 负责人: Barbara Bekins
• 金额: $ 8.29万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-15 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0326749&HistoricalAwards=false
• 关键词: Planning; Drilling; Installation; Boreholes; Cross

Modeling studies will be performed to plan new drilling for the next generation of cross-hole and single well in situ hydrologic tests in overpressured accretionary complexes. Planning for future drilling and hydrologic tests must address two concerns. The first concern is that formation conditions during previous tests were clearly disturbed but the extent of disturbance and implications for the test results are poorly understood. The second concern is the possibility that future tests may interfere with long-term monitoring efforts by perturbing the in situ conditions. Two types of models will be used to address the important questions. Using consolidation models, changes in physical properties around boreholes when the formation is open to hydrostatic conditions during extended periods will be examined. Using pore pressure and solute transport models, different single and two well test scenarios will be used to design optimal tests and assess their effect on long-term monitoring.

将进行建模研究，以规划新的钻井，用于下一代超压增生复合体的跨孔和单井原位水文测试。未来的钻探和水文测试计划必须解决两个问题。第一个问题是，在以前的测试过程中，地层条件明显受到干扰，但干扰的程度和对测试结果的影响却知之甚少。第二个问题是，今后的试验可能会干扰现场条件，从而干扰长期监测工作。将使用两种类型的模型来解决这些重要问题。使用固结模型，当地层在长时间内对静水条件开放时，将检查钻孔周围物理性质的变化。利用孔隙压力和溶质运移模型，将使用不同的单井和双井测试方案来设计最佳测试，并评估其对长期监测的影响。