| 摘要 |
<p>PROBLEM TO BE SOLVED: To estimate the state of the underground crack between a well and an existing production well obtaining inflow time until muddy water deviates from the inside of the well being dug and reaches the production well, the distance between wells between inflow points, the viscosity coefficient of fluid, the column pressure of the muddy water, a production well inflow point pressure, and a storage layer effective layer thickness, and calculating a penetration rate and a penetration rate layer thickness product according to a specific expression. SOLUTION: Inflow time (t) until muddy water deviates from the inside of a well 1 being dug and reaches production wells 2 and 3, well distance (r) between the inflow points between the deviation point of the well being dug and the existing production wells 2 and 3, a viscosity coefficient (μ) of fluid near an interference inflow point, a muddy water column pressure Pi at the deviation depth of the well 1 being dug, a production well inflow point pressure Pp, and a storage layer effective layer thickness (h) are obtained, a penetration rate K=-Vμr/(Pp-Pi)=-r/t×μr/(Pp-Pi) (V: flow rate) is calculated, further a penetration rate layer thickness product = k×h is calculated, and the state of the underground crack between the well 1 and the production wells 2 and 3 is estimated.</p> |
