A preparation method of rock samples simulating differential distribution of oil and water
A technology of rock samples and simulated oil, which is applied in the field of oil exploration and exploration, and can solve the problems that the oil-water transition zone cannot be simulated.
Active Publication Date: 2018-04-06
PETROCHINA CO LTD
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Problems solved by technology
This method can simulate the uniform oil-water saturation in ordinary oil-bearing formation rocks, but it cannot simulate the oil-water transition zone where the oil-water saturation varies vertically
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[0017] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0018] The specific implementation manners of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0019] refer to figure 1 As shown, the preparation method of the rock sample of the simulated oil and water differential distribution of the embodiment of the ...
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Abstract
The invention relates to the technical field of petroleum production and exploration, in particular to a method for manufacturing rock samples for simulating oil and water different distribution. The method includes determining centrifugal speeds according to the thicknesses of oil and water transition zones of target oil-bearing strata and the thicknesses of set oil and water transition zones for simulating rock samples of the target oil-bearing strata; preliminarily treating oil and water of the rock samples according to set conditions; carrying out centrifugal treatment on the rock samples according to the centrifugal speeds under preset conditions to obtain target rock samples after the oil and water of the rock samples are preliminarily treated. The method in an embodiment of the invention has the advantages that the rock samples can be prepared in laboratories, longitudinal distribution change of saturation of the oil and water transition zones can be simulated by the rock samples, and accordingly necessary experimental simulation foundation can be provided for developing the oil and water transition zones.
Description
technical field [0001] The invention relates to the technical field of oil exploitation and exploration, in particular to a method for preparing a rock sample that simulates the differential distribution of oil and water. Background technique [0002] In the field of petroleum exploitation, the boundary between oil-bearing layer and water-bearing layer is not completely clear. Usually there is a transition zone from oil-bearing layer to water-bearing layer with a thickness of tens of meters to hundreds of meters, which is called the oil-water transition zone. Inside the oil-water transition zone, the oil saturation is getting lower and the water saturation is getting higher and higher from the top to the bottom, presenting a monotonic transformation related to depth. As far as oil production is concerned, due to the unresolved understanding of the law of saturation change in the oil-water transition zone and the development of technology, it is difficult to extract tens of b...
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IPC IPC(8): G01N1/28
Inventor 周明辉孙文杰张善严罗文利宣英龙马德胜宋新民江航冀中原郝强升
Owner PETROCHINA CO LTD