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A double two-dimensional trajectory optimization method for processing a three-dimensional obstacle avoidance well

A technology for trajectory optimization and obstacle bypassing, applied in image data processing, electrical digital data processing, special data processing applications, etc., can solve the problems of inability to construct three-dimensional obstacle wells, and the construction difficulty is huge, so as to ensure the feasibility of drilling construction, The effect of reducing the curvature of the wellbore and reducing the difficulty of construction

Active Publication Date: 2019-05-03
XINJIANG BEIKEN ENERGY ENG
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Problems solved by technology

[0003] The present invention provides a double-two-dimensional trajectory optimization method for dealing with three-dimensional obstacle-circling wells, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that existing conventional tools while drilling cannot directly perform difficult three-dimensional obstacle-circling wells. Construction, there is a huge difficulty in construction when using conventional MWD tools to twist the azimuth

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  • A double two-dimensional trajectory optimization method for processing a three-dimensional obstacle avoidance well
  • A double two-dimensional trajectory optimization method for processing a three-dimensional obstacle avoidance well
  • A double two-dimensional trajectory optimization method for processing a three-dimensional obstacle avoidance well

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Embodiment 1

[0028] The first step is to determine the design projection map of the three-dimensional obstacle-around well and extract the borehole of the three-dimensional obstacle-around well Azimuth of curvature and borehole torsion azimuth;

[0029] The second step is to optimize the directional wells that need to convert the three-dimensional obstacle drilling trajectory into a two-dimensional two-dimensional drilling trajectory;

[0030] The third step is to select the position of the kickoff point in the directional section of the two-dimensional trajectory, and determine the maximum inclination angle of the first straight section and the length of the first buildup section according to the combined deflection capability of the drilling tool, and calculate the first directional section borehole curvature;

[0031] When selecting the position of the kick-off point mentioned above, it is necessary to meet the condition 1: the ground is stable, the directional construction is safe, ...

Embodiment 2

[0052] Embodiment two: if figure 2 , as shown in Table 1, 2, 3, for example: well FNHW4045, design well depth: inclined depth: 4110.5m, vertical depth: 2504.46m (9m without core filling), magnetic declination: east deviation 4°03′ , meridian convergence angle: west deviation 0°54′, projected azimuth 15.59°. As shown in Table 1, the target point parameter table of FNHW4045 well is shown in Table 2: the basic data table of the original three-dimensional obstacle avoidance design of the wellbore, as shown in Table 3: the basic point data table of the dual-dimensional trajectory design of the wellbore after optimization .

[0053] as attached figure 2 As shown, KOP1 is the initial position of the first ramping point, KOP2 is the end position of the first stabilizing section, EOB1=KOP2, and EOP2 is the initial position of the second ramping point. The calculation method using the design software Landmark is: input any two of the three parameters of the first section of the wellb...

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Abstract

The invention relates to the technical field of petroleum and gas drilling, in particular to a double-two-dimensional trajectory optimization method for processing a three-dimensional obstacle avoidance well, which comprises the following steps of: 1, extracting the borehole curvature of the three-dimensional obstacle avoidance well and the azimuth angle of the borehole torsion direction; 2, optimizing the directional well needing to convert the drilling track of the three-dimensional obstacle avoidance well into double two-dimensional drilling tracks; 3, calculating the borehole curvature ofthe first orientation section; 4, calculating a first section of two-dimensional track projection curve; and 5, setting the end point of the first stable inclined section as the starting point of thesecond increasing inclined section, and calculating a second section two-dimensional track projection curve before landing. According to the invention, the existing three-dimensional directional trajectory data and related geological data are taken as the basis; the three-dimensional directional track is subjected to double-two-dimensional-track secondary optimization, difficulty is decomposed, rotary guiding construction is achieved through matching of a conventional power screw drill tool, the problem that a conventional rotary guiding tool cannot directly construct a three-dimensional directional well is effectively solved, and meanwhile drilling cost is reduced.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, and relates to a dual- and two-dimensional trajectory optimization method for processing three-dimensional obstacle-circling wells. Background technique [0002] At present, in the design and development of oil drilling, many wells need a large twist and azimuth in the well section above 3,000 meters, and they are often designed as three-dimensional obstacle wells. The design data is based on the use of rotary steerable equipment in the building section to assist Completion of drilling construction. However, in actual implementation, the rotary steerable equipment is seriously lacking. Due to the monopoly of foreign technology, the development of supporting tools cannot be satisfied in a short time. In the absence of special tools such as rotary steerable, conventional tools while drilling combined with single-curved screw power drilling tools are used to realize It is difficult t...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/00
Inventor 顾黎明成景民蒋贵智孔德宏顾胜华张凯汤飞张智君田永岗段志明
Owner XINJIANG BEIKEN ENERGY ENG
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