METHOD OF OVERWATER EARTH OIL LAYER THICKNESS DEFINITION AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC G01N1/10 

FIELD: oil and gas industry.

SUBSTANCE: layer of oil is cut off with a vertical cutoff from the total mass of overwater oil. The oil layer is diluted inside the cutoff by an organic diluent of a fixed volume and the resulting solution is transferred to a measuring container. The solvent is fed directly to the oil layer using a separate transparent double-acting pumping device. The oil with the solvent is mixed to the depth of the needle cut in circular motions of the pump feed and suction needles and then transferred from the cutoff to a separating funnel to separate the oil solution from the occasionally selected water by the pump. The volume of oil is measured as the difference between the volumes of the obtained and measured mixture and the solvent according to the formula: V_o=V_cm-V_s, where V_o is the oil volume, V_cm is the volume of the obtained and measured mixture, V_s is the solvent volume. The thickness of the overwater oil layer in the studied point of the reservoir is defined as the ratio of the oil volume V_o to the area of the internal section F of the cutoff according to the formula δ=(V_cm-V_s)/F. The supply of solvent to the oil layer and the return selection of the oil solution are organized repeatedly at a considerable value of the overwater oil layer - in a cyclic regime until the oil solution is completely absent in the cutoff. The pump and the cutoff are made as separate devices. The cutoff has, on the outside, a float in the form of a torus, a weighted lower edge for vertical entry of the cutoff into the oil layer and for the cutoff stabilization on the water surface with the oil layer. The pump contains a needle, the depth of the needle's cut is made in the form of a cut at 45° to the vertical.

EFFECT: increased accuracy of overwater earth oil layer thickness definition.

3 cl, 3 dwg, 1 tbl