Method and device for calculating production pressure difference of oil wells with multiple sets of reservoir bodies for carbonate rock
A carbonate rock, calculation method technology, applied in earthwork drilling, wellbore/well components, measurement, etc., can solve problems such as high cost, large manpower and material resources, and achieve the effect of improving efficiency and reducing costs
Active Publication Date: 2019-07-09
PETROCHINA CO LTD
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[0004] However, the above-mentioned method of calculating the production differential pressure needs to measure the formation pressure and the bottom hole flow pressure, and the bottom hole flow pressure needs to be monitored in the well, so it needs a lot of manpower and material resources, which makes the cost of calculating the production pressure difference high
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[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0046] Before describing the specific embodiment of the present invention, some basic concepts are explained first:
[0047] (1) Reservoir
[0048] Reservoir bodies can be used as pores and fractures for storing oil and gas, which are not distributed in layers, but form irregular combinations within and between layers.
[0049] (2) Well storage ...
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The embodiment of the invention provides a method and device for calculating the production pressure difference of oil wells with multiple sets of reservoir bodies for carbonate rock. The method comprises the steps: measuring wellhead pressure before fluid injection; determining first injection pressure when the first reservoir body is filled with the fluid and the fluid starts to be injected intothe second reservoir body, wherein the first reservoir body is a previous-stage reservoir body of the second reservoir body; and calculating a production pressure difference according to the wellheadpressure and the first injection pressure, wherein the production pressure difference is a difference value between the formation pressure and the bottom hole flow pressure. According to the embodiment of the invention, the production pressure difference calculation cost can be reduced.
Description
technical field [0001] The embodiments of the present invention relate to the field of oil production engineering technology, and in particular to a method and device for calculating the production pressure difference of oil wells with multiple sets of carbonate reservoirs. Background technique [0002] In the oil wells producing multiple sets of reservoirs in carbonate rocks, when the energy of the oil wells is sufficient, spontaneous production can be carried out; when the energy of the oil wells is insufficient, the wells can be replaced by water injection or gas injection for crude oil production. [0003] At present, whether to inject water or gas into the oil well is usually determined according to the production pressure difference. Since when the formation pressure is greater than the saturation pressure, degassing in the near-wellbore area is not obvious, and when the average formation pressure level is high, the reservoir does not undergo irreversible plastic defor...
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Login to View More IPC IPC(8): E21B47/06
CPCE21B47/06
Inventor 杨文明张强昌伦杰刘勇于志楠苟柱银李洪孙红海刘敏袁晓满廖伟伟王培俊罗慎超肖云
Owner PETROCHINA CO LTD