Bit allocation method based on average specific energy of well segments

A drill bit, specific energy technology, applied in drill bits, drilling equipment, earthwork drilling and other directions, can solve the problem of not being able to optimally configure the drill bit, and achieve the effect of refinement in selection

Inactive Publication Date: 2015-09-02
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0004] In order to solve the problem that the existing drill bit configuration method cannot optimally configure the drill bit for different formations and drilling characteristics, ...

Method used

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  • Bit allocation method based on average specific energy of well segments
  • Bit allocation method based on average specific energy of well segments
  • Bit allocation method based on average specific energy of well segments

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Embodiment Construction

[0040] This specific embodiment proposes a drill bit configuration method based on the average specific energy of the well section, combining figure 1 shown, including:

[0041] Step 11, dividing the predetermined formation to be drilled into a plurality of micro-well sections according to the geological logging data of the well to be drilled and the logging data of adjacent wells that have been drilled.

[0042] combine figure 2As shown in the well to be drilled, according to the geological logging data of the well to be drilled and the logging data of adjacent wells that have been drilled, the predetermined formation to be drilled can be divided into multiple micro-well sections. Stratum #1 and #2 are respectively above the starting layer where the bit starts drilling, and #3 is below the stop layer where the drill bit stops drilling. The h part between the starting layer and the stop layer is divided into several micro well sections , and h can also represent the drillin...

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Abstract

The invention provides a bit allocation method based on average specific energy of well segments and belongs to the technical field of petroleum drilling engineering. The method includes: according to geological logging data of a well to be drilled and logging data of a well drilled, dividing a predetermined formation of the well to be drilled into multiple micro well segments; acquiring a specific energy value of each bit at the predetermined micro well segment; according to the specific energy value of each bit at the predetermined micro well segment, allocating the bits of optimal drilling effect to the predetermined formation of the well to be drilled. According to the geological logging data of the well to be drilled and the logging data of the well drilled, the predetermined formation of the well to be drilled is divided into the multiple micro well segments; according to the specific energy value of each bit at the predetermined, the bits of optimal drilling effect are allocated to the well to be drilled; according to a bit efficiency index, the bits allocated to the predetermined formation of the well to be drilled are optimally adjusted, type selection for the bits is finer and more reasonable, and the method is applicable to various links such as drilling design and post-drilling analysis.

Description

technical field [0001] The invention relates to a drill bit configuration method based on the average specific energy of a well section, and belongs to the technical field of petroleum drilling engineering. Background technique [0002] The drill bit is the most important tool for breaking rock during the drilling process, and the wellbore is formed by the bit breaking rock. The quality of a borehole and the length of time it takes are not only related to the efficiency of the drill bit in breaking rocks, but also related to the adaptability of the drill bit to the formation. The less rock-breaking work done by the drill bit per unit volume, the higher the rock-breaking efficiency of the drill bit and the better the matching between the drill bit and the formation. Therefore, how to configure a drill bit sequence that can achieve efficient and economical rock breaking in the formation to be drilled has always been a long-term research topic in the drilling field. In recent...

Claims

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Application Information

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IPC IPC(8): E21B10/00
Inventor 崔猛汪海阁葛云华张晋文李洪
Owner BC P INC CHINA NAT PETROLEUM CORP
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