Method and system for determining formation pressure under condensate gas reservoir circulating gas injection condition
A technology for condensate gas reservoirs and formation pressure, which is applied in the determination method and system field of formation pressure of condensate gas reservoirs under the condition of cyclic gas injection, can solve the problems of few prediction methods and the inability to accurately control the formation pressure of condensate gas reservoirs, and achieve Improve the effect of technical support
Pending Publication Date: 2020-12-22
PETROCHINA CO LTD
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Problems solved by technology
At present, there are few methods for predicting the formation pressure of condensate gas reservoirs under the condition of cyclic gas injection, and it is impossible to accurately control the formation pressure of condensate gas reservoirs during the production process of cyclic gas injection.
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[0051] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0052] According to one aspect of the present invention, this embodiment discloses a method for determining formation pressure under the condition of cyclic gas injection in condensate gas reservoirs. like image 3 As shown, in this embodiment, the method includes:
[0053] S100: Obtain geological characteristic parameters and development dynamic data of condensate gas reservoirs;
[0054] S200: Obtain real-time formation pressure a...
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The invention provides a method and system for determining formation pressure under a condensate gas reservoir circulating gas injection condition. The method comprises the steps that condensate gas reservoir geological characteristic parameters and development dynamic data are obtained; and according to the corresponding relation of the condensate gas reservoir geological characteristic parameters, the development dynamic data and the formation pressure, the real-time formation pressure is obtained, the formation pressure of a condensate gas reservoir in the condensate gas exploitation process is monitored in real time, and the situation that a large amount of condensate gas is separated out to form condensate oil and then is lost in a formation is avoided.
Description
technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method and system for determining formation pressure under the condition of cyclic gas injection in condensate gas reservoirs. Background technique [0002] Condensate gas pool is a special type of gas pool, which is a gaseous mineral pool formed in a specific geological environment, such as figure 1 shown. Condensate gas exhibits gaseous characteristics under reservoir conditions, and as the formation pressure drops to the dew point pressure, condensate gas will undergo reverse condensation effect to produce condensate oil, as shown in figure 2 shown. Therefore, during the development of condensate gas reservoirs, condensate oil will be precipitated both in the reservoir and on the ground, and the condensate oil precipitated in the formation will adhere to the rock surface in the form of an oil film, which is not easy to be recovered and lost in the formation...
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Login to View More IPC IPC(8): E21B49/00E21B47/06
CPCE21B49/00E21B47/06
Inventor 张安刚范子菲赵伦许安著宋珩
Owner PETROCHINA CO LTD