A method and device for determining the movable reserves of crude oil in tight reservoirs
A technology for tight reservoirs and crude oil, applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve problems such as large errors, errors in the movable reserves of crude oil in tight reservoirs, and large differences in permeability of tight reservoirs, etc.
Active Publication Date: 2017-03-08
PETROCHINA CO LTD
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Problems solved by technology
[0004] In the process of realizing this application, the inventor found that there are at least the following problems in the prior art: the permeability of tight reservoirs has a large difference between the surface conditions and the formation conditions, and the formation conditions obtained by inferring the ground conditions may have a large error, resulting in Movable reserves of crude oil in tight reservoirs determined by the formation conditions may have large errors
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[0044] Embodiments of the present application provide a method and device for determining the movable reserves of crude oil in tight reservoirs.
[0045] 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.
[0046] An embodiment of a method for determining the movable reserves of crude oil in tight reservoirs of the present application is introduced below.
[0047] figure 1 It is a flow chart of ...
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An embodiment of the invention discloses a method and a device for determining MOIP (movable oil in place) of crude oil of a tight reservoir. The method includes acquiring first parameters of a core plunger sample of a target stratum, and computing effective porosity, overburden permeability and starting pressure gradient of the target stratum according to the first parameters; acquiring second parameters of the crude oil of the target stratum, and determining the maximum movable radius of the crude oil according to the overburden permeability, the starting pressure gradient and the second parameters of the target stratum; determining the lower limit value of the effective porosity radius required for flowing of the crude oil according to the overburden permeability, and determining effective movable-in-place ratio according to the lower limit value of the effective porosity radius; determining the MOIP of the target stratum according to the effective porosity, the second parameters, the maximum movable radius of the crude oil and the movable-in-place ratio of the target stratum. By the method and the device for determining MOIP of the crude oil of the target reservoir, the recoverable reserve of the crude oil of the tight reservoir in the target stratum in a research area can be accurately computed.
Description
technical field [0001] The present application relates to the technical field of petroleum exploration and development, in particular to a method and device for determining the movable reserves of crude oil in tight reservoirs. Background technique [0002] With the development of oil and gas exploration and development from conventional oil and gas reservoirs to unconventional oil and gas, oil and gas in tight reservoirs has gradually become an important field of oil and gas exploration and development, especially tight oil and shale oil will gradually become new highlights in oil exploration and development. There are many key problems to be solved in the oil exploration and development of tight reservoirs, among which how to accurately determine the movable reserves of crude oil in tight reservoirs is one of the most critical problems. [0003] Existing methods for determining the movable reserves of crude oil in tight reservoirs generally include calculating the threshol...
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IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 侯连华王京红姚泾利张丽君韩文学巴丹李伯华
Owner PETROCHINA CO LTD