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Reservoir body use condition judgment method and well-reservoir relationship identification method

A technology of production status and reservoir body, applied in the petroleum field, can solve problems such as difficult to meet the needs of precise drilling of oil wells

Pending Publication Date: 2021-01-15
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the method of dividing fracture-vuggy reservoirs by three reservoir structures is also difficult to meet the needs of accurately tapping oil wells

Method used

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  • Reservoir body use condition judgment method and well-reservoir relationship identification method
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  • Reservoir body use condition judgment method and well-reservoir relationship identification method

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Effect test

Embodiment 1

[0016] Such as figure 1 As shown, the method for judging the production status of the reservoir body in Embodiment 1 of the present invention includes the step S1 of determining the judging amount. The judgment quantity determination step S1 specifically includes determining the evolution period of the reservoir body connected to the oil well according to the seismic exploration data of the oil well, and taking the reservoir structure with the largest oil storage volume per unit volume in the reservoir body as the judgment quantity. Among them, the reservoir structure is one of isolated cave structure, pore-cavity combination structure, fracture-hole combination structure and fracture accumulation structure. Such as Figure 2a to Figure 2b As shown, the aforementioned evolution period is one of the first evolution period, the second evolution period, the third evolution period and the fourth evolution period, Figure 2a The shown reservoir body 1a is in the first evolution s...

Embodiment 2

[0030] The well-reservoir relationship identification method in the second embodiment of the present invention identifies the reservoir structure of the reservoir body connected to the oil well according to the oil production per unit pressure drop EEI or unit pressure recovery water consumption PRC of the oil well. The reservoir-reservoir structure is one of the isolated cave structure, pore-cavity combination structure, fracture-pore combination structure and fracture accumulation structure. Decrease in turn.

[0031] Such as Figure 2a to Figure 2b As shown, the reservoir body has four evolution periods, namely, the first evolution period, the second evolution period, the third evolution period and the fourth evolution period, Figure 2a The shown reservoir body 1a is in the first evolution stage, and the reservoir body in the first evolution stage is mainly composed of fracture-accumulation structures 11, where the identification feature of the fracture-accumulation struc...

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Abstract

The invention relates to a reservoir body use condition judgment method and a well-reservoir relationship identification method, and the reservoir body utilization condition judgment method comprisesthe steps: determining the evolution period of a reservoir body communicated with an oil well according to the seismic exploration data of the oil well, and enabling a reservoir structure with the maximum oil storage capacity in unit volume in the reservoir body to serve as a judgment quantity; identifying a reservoir structure of a reservoir body communicated with the oil well according to the unit pressure drop oil production EEI or the unit pressure recovery water consumption PRC of the oil well; and judging whether the reservoir structure of the reservoir body communicated with the oil well is the judgment quantity or not, if not, failing to use the reservoir structure with the maximum oil storage quantity in the unit volume in the reservoir body, and if yes, using the reservoir structure with the maximum oil storage quantity in the unit volume in the reservoir body used by the oil well. The reservoir body use condition judgment method is helpful for people to master the reservoirbody use condition of the oil well and guide the accurate potential tapping of the oil well so as to improve the production efficiency and the cumulative yield of the oil well.

Description

technical field [0001] The invention belongs to the technical field of petroleum, and in particular relates to a method for identifying a well-reservoir relationship and a method for judging the producing state of a reservoir including the method for identifying the well-reservoir relationship. Background technique [0002] In the petroleum field, reservoirs, especially fractured-cavity carbonate reservoirs, are considered to be composed of three types of reservoir structures: fracture structure, pore structure, or karst cave structure. The structural forms can be fracture structure, pore structure, and karst cave structure. or any combination of the three. At present, the structural form and geological reserves of the reservoir body are only used to guide the construction of brick wells and evaluate the recoverable reserves of oil wells, but the inventor has painstakingly found in the process of implementing the present invention that the structural form and geological rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/02G06F17/11
CPCG06Q10/06315G06Q50/02G06F17/11
Inventor 任文博刘培亮程洪蒋林唐博超李成刚刘刚波陈明仁谢菲谷海亮黄米娜李桂云黄晓芸魏林杉张晓怡
Owner CHINA PETROLEUM & CHEM CORP