#Hdr projects 2 crack crack

#Hdr projects 2 crack crack

It is also possible to estimate interfacial stiffness of a reservoir crack which is induced due to partial contact between the upper and lower surfaces of the crack. By the use of the simple model, it is possible to estimate length and aperture of the crack.

In order to examine the effect of the leakage on the dynamics, we set up a simple model which accounts for the leakage, adopting the extreme condition that fluid can go in and out of crack freely at the crack tips. parameters governing the dynamics of a fluid-filled crack. This means that fluid leakage from the crack iips is likely to be one of the main. In HDR/Hot Wet Rock (HWR) fields, geothermal reservoirs consist of networks of cracks and permeable layers. īy using a two-dimensional fluid-filled crack model with fluid leakage at the crack tips, crack characterization was attempted from microseimic events observed at the Hijiori Hot Dry Rock (HDR) field, Japan. In Section 13, the report provides recommendations for continued research and development to reduce technical and economic uncertainties relevant to the commercialization of HDR. Section 11 treats a modification of the economic model for predicting costs for direct, non-electric applications. A sensitivity and uncertainty analysis using this model is given in Section 10. In Section 9, a generalized economic model for HDR-produced electricity is presented to show the effects of resource grade, reservoir performance parameters, and other important factors on projected costs. In Section 8, composite case conditions were used to reassess economic projections for HDR-produced electricity. Important parameters include: (1) resource quality-average geothermal gradient (C/km) and well depth, (2) reservoir performance-effective productivity, flow impedance, and lifetime (thermal drawdown rate), (3) cost components-drilling, reservoir formation, and power plant costs and (4) economic factors-discount and interest rates, taxes, etc. Based on these comparisons, the report estimates parameters for three composite cases. In Section 7, the six economics studies cited above are reviewed and compared in terms of their key resource, reservoir and plant performance, and cost assumptions.

Following the evaluation of drilling and reservoir performance, power plant choices and cost estimates are discussed in section 6 of the report. Bases of 1989 collars ($) were selected to normalize costs. In this review, only economic projections for base load electricity produced from HDR systems were considered. A general evaluation of the technical feasibility of HDR technology components was also conducted in view of their importance in establishing drilling and reservoir performance parameters required for any economic assessment. The economic models reviewed include the following studies sponsored by Electric Power Research Institute (EPRI)-Cummings and Morris (1979), Los Alamos National Laboratory (LANL)-Murphy, et al. The main objectives of this study were first, to review and analyze several economic assessments of Hot Dry Rock (HDR) geothermal energy systems, and second, to reformulate an economic model for HDR with revised cost components.