Determination of the Optimal Bottomhole Pressure in Order to Reduce the Removal of the Solid Phase in the Weakly Consolidated Reservoir

The elaboration of weakly consolidated terrigenous collectors is accompanied by considerable removal of the solid particles. At one of the reservoirs of Western Siberia technique of evaluation and forecast of the volume of the removed solid particles on the basis of Finite-element modeling was tested. Suggested way to evaluate the volume of the removed particles includes multiple stages. Reconstruction of the dynamic, static properties of the deformation and durability with taking into account the textural features of the rock samples. Construction of the 1D geomechanical models in target layer and exceeding coal-measures. Creation of three-dimensional model of mechanical qualities for realization of further calculations for the well which is included in contour of 3D-model. Finite-element modeling of the part of the trunk of the well in poroelastic arrangement for evaluation of plastic effects which are arising in collector - sandstone and non-collector – aleurolite, argillite with fruit her calculation of the volume of the removed solid particles. It allows to determine the safest bottom hole pressure for the highest possible conservation of the stability of the well type "fishbone".