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

将进行建模研究，以计划在超压增生复合体中进行下一代跨孔和单井现场水文测试的新钻井。规划未来的钻井和水文试验必须解决两个问题。第一个问题是，在之前的测试中，地层条件明显受到干扰，但对干扰的程度和对测试结果的影响知之甚少。第二个关切是，今后的试验可能会扰乱现场条件，从而干扰长期监测工作。将使用两种类型的模型来解决重要的问题。使用固结模型，当地层长时间处于流体静力条件下时，将检查井眼周围物理性质的变化。利用孔隙压力和溶质运移模型，采用不同的单井和双井测试方案来设计最佳测试方案，并评估其对长期监测的影响。

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.