Simple and convenient calculation method for recoverable reserves of condensate oil
A calculation method and technology for condensate oil, applied in design optimization/simulation, special data processing application, CAD numerical modeling, etc. Calculation of convenient effects
Pending Publication Date: 2022-06-14
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
For complex condensate gas reservoirs, it is difficult to establish a geological model that conforms to the actual situation; for high temperature, high pressure, and highly saturated condensate gas reservoirs, it is difficult to obtain representative original fluid samples and PVT analysis, and it is also time-consuming and laborious. work; if the development time of the condensate gas reservoir is long, the workload of history matching in the numerical simulation is very large
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[0040] The present invention will be further described below in conjunction with the accompanying drawings.
[0041] The simple and convenient calculation method of the recoverable reserves of condensate oil of the present invention, such as figure 1 shown, including the following process:
[0042] The first step: development unit division
[0043] According to the static data of the condensate gas reservoir, combined with the dynamic analysis data of the single well of the condensate gas reservoir, the reservoir connectivity between wells is studied and judged, and different development units are divided according to the connectivity. For condensate gas reservoirs with small reserves and good connectivity, it is not necessary to divide development units, and the entire condensate gas reservoir can be treated as one development unit.
[0044] Wherein, the static data includes condensate gas reservoir structure, reservoir, fault, effective thickness, porosity, permeability, o...
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The invention discloses a simple calculation method for recoverable reserves of condensate oil. The method comprises the following steps: dividing development units; judging a driving type; dividing development stages; tired birth data arrangement; establishing a linear equation between cumulative condensate oil and cumulative natural gas; and calculating the recoverable reserves of the condensate oil. According to the method, reliable original fluid sampling and complete PVT experimental research do not need to be obtained, the method does not depend on numerical simulation research on the basis of a reliable geologic model, and based on natural gas and gas condensate yield data in the middle and later periods of development, simple and effective calculation of the gas condensate recoverable reserves (recovery ratio) is achieved on the basis of the natural gas recoverable reserves; the method is particularly suitable for medium-high condensate oil content condensate gas reservoirs which are nearly saturated (small in ground dew pressure difference).
Description
technical field [0001] The invention relates to the field of oil and natural gas exploration and development, and more particularly, to a simple and convenient calculation method for recoverable reserves of condensate oil. Background technique [0002] Condensate is a very valuable petroleum resource, and the level of its recoverable reserves and recovery factor is an important indicator to measure the development level of condensate gas reservoirs, and it is also the main basis for reserves management, development adjustment, and investment planning. Therefore, accurate calculation The recoverable reserves (recovery factor) of condensate are very important. [0003] Condensate gas reservoirs are generally buried deep, and the formation temperature and pressure are high. The formation condensate gas exists in a single gas phase under the original formation conditions, but during the depressurization development process, after the formation pressure is lower than the dew poin...
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IPC IPC(8): G06F30/20G06F111/10
CPCG06F30/20G06F2111/10
Inventor 余元洲马奎前罗宪波廖新武康凯张雷黄磊吴浩君汪跃刘文超
Owner CHINA NAT OFFSHORE OIL CORP