Completing a wellbore

A wellbore completion assembly, the wellbore completion assembly configured to be positioned in a wellbore system comprising a lateral wellbore extending from a main wellbore, the lateral wellbore extending from a bottom hole location in a poorly consolidated producing formation to a first location in a mechanically competent formation uphole from the poorly consolidated producing formation, the wellbore completion assembly comprising:

• a permeable proppant configured to fill a portion of the lateral wellbore from the bottom hole location to the first location in the mechanically competent formation;
• a mesh plug configured to be positioned in the lateral wellbore at the first location proximal the mechanically competent formation, the mesh plug sealed to an inner surface of the lateral wellbore at the first location, the mesh plug configured to hold the permeable proppant in the portion of the lateral wellbore from the bottom hole location in the poorly consolidated producing formation to the first location in the mechanically competent formation;
• a coiled tubing assembly configured to place the permeable proppant and the mesh plug in the wellbore system;
• and
• a controller operatively coupled to the coiled tubing assembly, the controller configured to perform operations comprising determining a volume of a portion of the wellbore system.