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Horizontal branch multi-well-group butted well and construction method thereof

A technology of horizontal branching and construction methods, applied in the direction of boreholes/well components, drilling equipment and methods, drilling equipment, etc., to achieve the effects of reducing mining risks, reducing drilling costs, and reducing construction periods

Active Publication Date: 2013-07-24
EXPLORATION TECH RES INST OF CHINESE ACADEMY OF GEOLOGICAL SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One object of the present invention is to provide a kind of horizontal branch multi-well group butt joint well for the technical defect of single one-to-one drilling structure. This kind of drilling distribution form can increase the exposed area of ​​ore seam, improve mining efficiency, reduce drilling cost Reduce construction time and reduce mining risk

Method used

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  • Horizontal branch multi-well-group butted well and construction method thereof
  • Horizontal branch multi-well-group butted well and construction method thereof
  • Horizontal branch multi-well-group butted well and construction method thereof

Examples

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Effect test

Embodiment 1

[0025] Embodiment 1: as figure 2 As shown, the horizontal branch multi-well group docking well in this embodiment adopts a distribution structure in which one horizontal well 3 corresponds to two vertical well groups, the first vertical well group includes two vertical wells 21a, 21b, and the second vertical well group includes Two vertical wells 22a, 22b; vertical wells 21a, 21b, 22a, 22b are connected to the horizontal well 3 at the target points at their respective bottoms (the target point 21T1 of the vertical well 21a and the target point 21T2 of the vertical well 21b are marked in the figure) , forming first and second horizontal mining passages 61, 62 corresponding to two vertical well groups one-to-one, wherein the target point at the bottom of the vertical well is located in the target ore seam 8 .

Embodiment 2

[0026] Embodiment 2: as Figure 3a As shown, the horizontal branch multi-well group docking well in this embodiment adopts a distribution structure in which one horizontal well 3 corresponds to two vertical well groups, and the two vertical well groups respectively include three vertical wells, forming two horizontal mining passages in total.

Embodiment 3

[0027] Embodiment 3: as Figure 3b As shown, the horizontal branch multi-well group docking well in this embodiment adopts a distribution structure in which one horizontal well 3 corresponds to three vertical well groups, and each vertical well group includes two vertical wells, forming three horizontal mining passages in total.

[0028] Now take the distribution structure of embodiment 1 as an example, specifically illustrate the construction method of the horizontal branch multi-well group butt joint well of the present invention:

[0029] Step 1: Drill four vertical wells 21a, 21b, 22a, 22b respectively to the target mineral layer 8, and perform mud logging and well logging to accurately determine the drilling depth of the target mineral layer 8, and control the well deviation of the drilled holes to make them as vertical as possible , run the vertical well surface casing 9 and the vertical well technical casing 10 respectively at corresponding depths, and cement the well w...

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Abstract

The invention discloses a horizontal branch multi-well-group butted well and a construction method thereof. The butted well adopts a distribution structure that a horizontal well corresponds to at least two vertical well groups; each vertical well group comprises at least two vertical wells; the vertical wells of each vertical well group are respectively communicated with the horizontal well at the target points respectively arranged at the bottoms of the vertical wells, so that horizontal mining channels which correspond to the vertical well groups one to one can be formed; and the target points arranged at the bottoms of the vertical wells are arranged in a target ore bed. By adopting a novel well drilling distribution form, the horizontal branch multi-well-group butted well enlarges the bare area of the ore bed, improves the mining efficiency, lowers the well drilling cost, reduces the construction period and reduces the mining risk.

Description

technical field [0001] The present invention relates to the technical field of geological and mineral mining, in particular to a horizontally branched multi-well group butt joint well and a construction method thereof. The horizontal branch multi-well group butt joint well is suitable for assisted gravity mining of soluble solid minerals, coal bed methane, heavy oil steam and Shale gas mining is especially suitable for the mining of salt mines and trona mines. Background technique [0002] Geological minerals include gaseous minerals such as natural gas, coal-derived gas, coalbed methane, and coal mine gas, liquid minerals such as petroleum and groundwater, and solid minerals such as coal and metals. There are various well types suitable for mining these geological minerals, among which horizontal butt joint wells are more commonly used. [0003] At present, horizontal docking wells usually use such as figure 1 Shown is a structure in which a horizontal well 3A abuts a ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21B43/30E21B7/00
Inventor 胡汉月刘志强刘海翔林修阔刘汪威隆东
Owner EXPLORATION TECH RES INST OF CHINESE ACADEMY OF GEOLOGICAL SCI
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