METHOD FOR DETERMINING THE VOLUME AND PLACE OF THE PRODUCED WATER ENTRY IN THE PROCESS OF DRILLING WELLS Russian patent published in 2018 - IPC E21B47/10 

FIELD: measurement technology; drilling of soil or rocks.

SUBSTANCE: invention relates to a method for determining the volume and location of produced water during drilling of wells. In the method, at a predetermined interval of drilling depth, the mud density is measured (ρ_fn), while determining the volume of the well, filled with drilling fluid (V_f). According to the calculation, a plot of the received volume of produced water (V_w), which, depending on the interval of drilling depth, is determined by the formula , where V_w – volume of reservoir water, m³; V_f – volume of drilling fluid, m³; ρ_f – initial mud density, kg/m³; ρ_fn – density of the drilling fluid at the n-th interval, kg/m³; ρ_w – density of water, kg/m³. In this case, the ascending part of the graph indicates the beginning of the flow of water, and the downward part indicates the completion of this process.

EFFECT: technical result consists in determining the volume and location of the produced water during the drilling of wells with high operational efficiency and accuracy in relation to the depth of drilling.

1 cl, 1 dwg