Stratum judgment and recognition method based on near-bit engineering parameters measured while drilling

A technology of engineering parameters and measurement while drilling, which is applied in measurement, automatic control system of drilling, drilling equipment, etc. Effect

Inactive Publication Date: 2019-05-24
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to provide a stratum judgment and identification method based on near-drilling engineering parameter measurement while drilling. In the drilling operation project, it can accurately judge the formation information encountered, guide the engineering operation in real time, and solve the current common gamma measurement possibility. The problem of not being able to make accurate identification of complex rock formations

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  • Stratum judgment and recognition method based on near-bit engineering parameters measured while drilling
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  • Stratum judgment and recognition method based on near-bit engineering parameters measured while drilling

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Embodiment

[0038] First, carry out indoor testing on the ground, select a rock x1, use the simulated rock breaking test device, first fix the applied torque value to A, adjust different WOB, when the WOB value is "one", record the vibration amount as "1" , and then record the above data in the corresponding relationship database, so it can be known: when the torque is A, the WOB is "one", and the vibration is "1", the rock formation to be drilled is x1; after completing this group of tests, the fixed torque value A remains unchanged, continue to change multiple sets of WOB values, and record the corresponding vibrations at the same time, so that the corresponding relationship between multiple sets of combined engineering parameters and lithology x1 is obtained; then continue to fix the torque value B unchanged, use the same The method continues to record the different vibrations caused by different weight-on-bit values ​​when the torque value is B, and put them into storage corresponding ...

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Abstract

The invention belongs to the technical field of drilling engineering, in particular relates to a stratum judgment and recognition method based on near-bit engineering parameters measured while drilling. The stratum judgment and recognition method is characterized by including the steps of (1) feature extraction; (2) data association; (3) field test geological evaluation; (4) accurate stratum judgment carried out by engineering parameters obtained through measurement of a measuring instrument; (5) a signal is transmitted to the ground through the transmission of electromagnetic wave or mud pulse for analysis and judgment of the ground staff after the accurate stratum information is confirmed. On the premise of preliminary determination of the stratum by gamma ray, down-hole lithology can befurther accurately judged by joint analysis of parameters obtained through down-hole measuring instruments, the data accuracy is higher, and the more complex stratum can be accurately identified. Themeasured information can be transmitted to the ground analysis and decoding software in real time by means of electromagnetic wave or mud pulse, and the stratum judgment and recognition method has better real-time performance than that of previous cuttings logging methods.

Description

technical field [0001] The invention belongs to the technical field of drilling engineering, and in particular relates to a stratum judgment and identification method based on measurement-while-drilling engineering parameters near a drill bit. Background technique [0002] Various complex and uncertain factors exist in the oil drilling process. In terms of geological conditions alone, factors such as lithological changes and formation pressure changes may be encountered. If the geological information currently being drilled cannot be obtained timely and accurately, It may cause misjudgment by ground technicians, affect the construction progress, and even cause engineering accidents. [0003] At present, the methods we use to obtain drilling geological information mostly come from adjacent well history data and logging and logging data to predict the geological parameters of new wells, and obtain cuttings data in real time during drilling, and compare them with adjacent well ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B44/00E21B47/00E21B49/00E21B47/013E21B47/06E21B47/13E21B47/18
Inventor 夏泊洢郭修成匡涛李连庆周超李永钊王月红田明高清春张青邓旭柳明曲鑫钟健张生龙苗哲玮
Owner BC P INC CHINA NAT PETROLEUM CORP
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