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Method and device for determining MOIP (movable oil in place) of crude oil of tight reservoir

A technology for tight reservoirs and crude oil, which is applied to earth-moving drilling, wellbore/well components, etc., can solve problems such as large errors, errors in movable crude oil reserves in tight reservoirs, and large differences in permeability of tight reservoirs. Achieving the effect of accurate recoverable reserves

Active Publication Date: 2015-03-25
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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  • Method and device for determining MOIP (movable oil in place) of crude oil of tight reservoir

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Embodiment Construction

[0044] The embodiments of the present application provide a method and device for determining the movable reserves of crude oil in a tight reservoir.

[0045] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described The embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.

[0046] The following describes an embodiment of the method for determining the movable reserves of crude oil in a tight reservoir according to the present application.

[0047] figure 1 It is a flowchart o...

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Abstract

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] This application relates to the technical field of petroleum exploration and development, and 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, tight reservoir oil and gas have gradually become an important area of ​​oil and gas exploration and development, especially tight oil and shale oil will gradually become new bright spots in oil exploration and development. There are many key problems to be solved in the oil exploration and development of tight reservoirs, and how to accurately determine the movable reserves of crude oil in tight reservoirs is one of the most critical problems. [0003] The existing methods for determining the movable reserves of crude oil in tight reservoirs generally include calculating the start-up pressure or s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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
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