Together with ESR-01 Anna Kottsova, we have published a review paper discussing how the injectivity can be influenced during geothermal operations.  (W.L., A.K., et. al., Mechanisms causing injectivity decline and enhancement in geothermal projects). In addition, a fully coupled thermo-hydro-mechanical model has been developed on the basis of cohesive zone method, which allows us to use FEM to describe fracture initiation and propagation without having difficulties in dealing with the stress singularity at the fracture tips. This model is applied to study the injection scenario of DAPwell, a scientific geothermal doublet being drilled at TU Delft campus now. The drilling of DAPwell is planned to be done by the end of August 2023. A series of fibre optic sensing, including DAS and DTS, has been installed in both injector and producer. In the injector, two DAS cables will be installed on the opposite sides of the wellbore, being outside of the casing and directly attached to the formation rock. In this way, we hope more information about the processes during injection can be monitored and obtained. For instance, possible cracking events are expected to be monitored and located precisely. My next work is to numerically study the micro-seismicity and its signals on dual-array DAS, aiming to know how much more information we can know compared with that from only a single DAS cable. This work will be down with the open-source code SPECFEM, which is based on spectrum finite element method to study the dynamic processes.