Double-layer intelligent drilling speed modeling method for geological exploration drilling process

A technology of geological exploration and modeling method, which is applied in the fields of drilling equipment, earthwork drilling, drilling automatic control system, etc. It can solve the problems of not forming a unified structure and achieve the effect of overcoming the coupling problem

Active Publication Date: 2017-08-29
CHINA UNIV OF GEOSCIENCES (WUHAN)
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AI Technical Summary

Problems solved by technology

The above method describes the formation drillability, a key parameter that directly affects the penetration rate, separately from the penetration rate, and does not form a unified framework

Method used

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  • Double-layer intelligent drilling speed modeling method for geological exploration drilling process
  • Double-layer intelligent drilling speed modeling method for geological exploration drilling process
  • Double-layer intelligent drilling speed modeling method for geological exploration drilling process

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Embodiment 1

[0049] The embodiment of the present invention provides a double-layer intelligent ROP modeling method in the geological exploration drilling process, which can effectively improve the accuracy and generalization ability of the ROP model, and lays a good foundation for the intelligent control of the geological exploration drilling process. see figure 1 , the geological exploration drilling process double-layer intelligent ROP modeling method of the present invention comprises the following steps:

[0050]Step S100: Obtain a sample data set based on the segmented cubic Hermitian interpolation calculation method; select the rate of penetration as an index to measure the efficiency of the geological exploration drilling process, analyze the mechanism of the drilling process, and determine various parameters that affect the rate of penetration , based on the segmented cubic Hermitian interpolation calculation method to fill in some missing data and obtain a sample data set; it spe...

Embodiment 2

[0074] See Table 1 and Table 2 for the drilling parameters, formation depth and seismic acoustic wave time parameters in a certain area. Effect of the present invention is simulated and verified by table 1 and table 2 data, please refer to Figure 9 , which is a specific embodiment of the above method applied to a certain place, including the following specific steps:

[0075] (1) The original data are Table 1 and Table 2. Based on the segmented cubic Hermitian interpolation method, the seismic acoustic wave time data and formation depth in Table 2 are correspondingly supplemented, and the following is obtained: image 3 The seismic acoustic wave time comparison chart of measurement and interpolation is shown. The sample data set consists of formation depth, formation drillability, seismic layer velocity, specific pressure on bit, rotational speed, specific water power, mud density, ROP, seismic acoustic wave time, etc. A total of 22 sets of data consist of 9 parameters.

[...

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Abstract

The invention discloses a double-layer intelligent drilling speed modeling method for the geological exploration drilling process. Modeling work is divided into four steps, specifically, partially-lacked earthquake acoustic wave and time data are made up through the sectional three-time Hermite interpolation method firstly so as to obtain a sample datum set; then a stratum drillability sub model is established through the Nadaboost-ELM algorithm; then the parameters which are high in correlation with the drilling speed are determined through the Pearson correlation analysis method; and finally a drilling speed sub model is established through the modified PSO-RBF algorithm. According to the method, the defects that in a previous drilling speed modeling method, the key parameter, namely the stratum drillability, and the drilling speed are not subjected to hierarchy division and do not form a unified framework, and a confirmatory or single intelligent modeling method is used are overcome, accuracy of drilling speed modeling and the generalization ability are improved, and the good foundation is laid for intelligent control of the geological exploration drilling process.

Description

technical field [0001] The invention belongs to the field of intelligent control of the geological exploration drilling process, in particular to a double-layer intelligent drilling speed modeling method for the geological exploration drilling process. Background technique [0002] Resource and energy security is an important part of national security and one of the keys to the sustainable development of the national economy. Guaranteeing resource and energy security should be based on the country. With the depletion of shallow mineral resources, the development of deep mineralization theory and the discovery of a large number of deep mineral resources at home and abroad, deep geological exploration and development have become inevitable. The drilling process of geological exploration is the process of reaching the target area through various complex formations and obtaining complete cores. In the drilling process of deep geological exploration, there are problems such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B44/00
CPCE21B44/00
Inventor 曹卫华甘超吴敏陈鑫胡郁乐宁伏龙陈茜
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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