A method for determining the optimal nozzle size for volumetric fracturing wells with tight oil

A technology for volume fracturing and determination of methods, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc. The effect of high production and stable production of oil wells

Active Publication Date: 2022-03-11
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

However, when mining in this area, the output is high in the early stage, and the output will decrease rapidly in the later stage, which reduces the recovery rate.

Method used

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  • A method for determining the optimal nozzle size for volumetric fracturing wells with tight oil
  • A method for determining the optimal nozzle size for volumetric fracturing wells with tight oil
  • A method for determining the optimal nozzle size for volumetric fracturing wells with tight oil

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Embodiment 1

[0057] A method for determining the optimal nozzle size of a tight oil volume fracturing well, comprising the following steps:

[0058] (1) Analyze the productivity test data of well X1, the target horizontal well in the reservoir, and obtain the basic data of well X1. The results are shown in Table 1:

[0059] Table 1 Basic data of Well X1

[0060]

[0061]

[0062] The formation pressure described in Table 1 is obtained through the following sub-steps: According to the bottom hole flowing pressure and the liquid production rate, regression is obtained as follows figure 1 The IPR curve shown; the formation pressure is extrapolated from the IPR curve. It should be noted that the formation pressure can also be obtained by other methods in the prior art.

[0063] (2) According to the basic data, determine the reasonable choke size of the target well, specifically obtained through the following sub-steps: According to the production pressure difference, water production r...

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Abstract

The invention discloses a method for determining the optimal nozzle size of a tight oil volume fracturing well, comprising the following steps: S1: obtaining basic data of a target well; S2: determining a reasonable nozzle size of the target well; S3: calculating different reasonable nozzle sizes Under the liquid production index and oil production index, the nozzle size corresponding to the maximum liquid production index and oil production index is the optimal nozzle size; S4: Calculate the declining production; S5: Calculate the cumulative liquid production under different reasonable nozzle sizes; S6 : Calculate the cumulative oil production under a single nozzle size; S7: Determine the size of the combination of nozzles; S8: Calculate the oil production index under different combination sizes of nozzles; S9: Calculate the cumulative oil production under different combination sizes of nozzles, cumulative oil production The combination size of the nozzle corresponding to the highest is the optimal combination size of the nozzle. The invention makes full use of the natural elastic energy of the oil reservoir, delays the decline period, makes more oil recovery and greater ultimate recovery ratio, and provides technical support for the efficient development of tight oil reservoirs.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration and development, in particular to a method for determining the optimal nozzle size of a tight oil volume fracturing well. Background technique [0002] Petroleum and natural gas have become one of the three strategic resources that affect my country's economic construction and sustainable development. At present, my country's dependence on foreign oil is very high, and it is facing severe oil security issues. As an important class of unconventional resources, tight oil has become an important development field in today's petroleum industry, and plays a decisive role in improving my country's energy self-sufficiency and ensuring energy security. In China, tight oil resources are very rich and widely distributed. Resource evaluation shows that the geological resources of tight oil in China are about 200×10 8 t, the amount of technically recoverable resources is (20~25)×10 8 t. The p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20E21B43/12G06F119/14
CPCG06F30/20E21B43/12G06F2119/14
Inventor 聂仁仕贾冉李景舜王宁代雪倪王喧孙式恒邱科荣
Owner SOUTHWEST PETROLEUM UNIV
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