6 results about "Rock core" patented technology

The invention discloses a method for determining reservoir water saturation, which comprises the following steps of: obtaining the porosity and permeability of a rock core, and establishing a porosity-permeability calculation model by combining acoustic logging data; Obtaining a saturation index n value, and establishing a reservoir resistivity calculation model when the water content is 100%; Respectively establishing a calculation model of irreducible water saturation and residual oil saturation; Determining the resistivity of the original formation water and the resistivity of the slurry filtrate of the oil reservoir by utilizing test analysis, and determining the resistivity of a pure oil layer by irreducible water saturation, residual oil saturation, resistivity of a flushing zone anda saturation index; And establishing a new reservoir water saturation calculation model, and calculating the reservoir water saturation through the reservoir measurement resistivity, the reservoir resistivity when the water content is 100%, the pure oil layer resistivity and the irreducible water saturation. According to the method, the water saturation of the reservoir stratum is solved point bypoint through logging data without depending on an alpha formula under the condition that formation water resistivity of different stratum sections of the stratum is unknown, and a new method is provided for accurately solving the water saturation of the reservoir stratum.

The invention discloses rock core sample storage equipment for geotechnical engineering exploration, and belongs to the technical field of civil engineering. The rock core sample storage equipment comprises a base, wherein the top surface of the base is fixedly connected with a support beam frame; a driving roller and a driven roller are rotationally connected between the inner surfaces of the support beam frame; the peripheral side surfaces of the driving roller and the driven roller are connected with two annular driving belts in symmetrical arrangement; a main driving motor is fixedly connected in a position, corresponding to the driving roller, on the surface of the support beam frame; one end of an output shaft of the main driving motor is fixedly connected with the driving roller; aset of storage mechanisms in equal-distance distribution is arranged on the surfaces of the two annular driving belts; and each storage mechanism comprises a positioning framework. Through the designof the annular driving belts and the storage mechanisms, the fixed storage structure of the conventional sample storage device is changed into a moving storage structure; through the moving storage structure, the arrangement position of the storage mechanisms can be fast changed; and through the fast change of the arrangement position, the fast taking and placing of the rock core samples can be convenient.

The invention relates to a rock core for acidification, a rock core combination and a preparation method, and belongs to the technical field of acidification. The rock core for acidification comprises a rock core body, a pore-forming structure and a connecting piece, wherein the rock core body is divided into a first sub-rock core and a second sub-rock core which are symmetrical, and the separation surface of the first sub-rock core and the second sub-rock core is a peracid surface; the pore-forming structure is positioned on the peracid surface of the first sub-core and/or the second sub-core and extends along the peracid direction; the connecting piece is used for enabling the first sub-core and the second sub-core to be in butt joint, so that the pore-forming structure is clamped between the peracid surfaces of the first sub-core and the second sub-core; and the pore-forming structure is selected from spherical particles of 20 meshes to 100 meshes and/or strip-shaped sheet bodies with the width of 1 mm to 2 mm and the thickness of 0.02 mm to 0.3 mm. When the rock core for acidification is used for a steering acidification evaluation experiment, the rock core has higher adaptability, and the situation that cracks or pores exist in the rock core can be simulated.

An embodiment of the invention provides a quantitative determination method of interbedded cross flows of heterogeneous rock core models. The method is achieved by comparing oil extraction amount, calculated in a layered mode, of each single-layer model and oil saturation, obtained in a CT scanning method, of each single-layer model. The method successfully solves the difficult problems of quantitatively describing oil saturation dynamic distribution and layered calculation inside a multi-layer rock core in a flood pot test of the interbedded heterogeneous rock core models, achieves quantitative calculation of the interbedded cross flows in the water flooding process, and plays an important role in learning about a heterogeneous water flooding rule and mutual actions between layers, determining experiment assessments of remaining oil distribution and adjusting development measures.