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Three-dimensional (3D) horizontal well borehole track controlling method

A control method and wellbore trajectory technology, applied in wellbore/well components, directional drilling, earth-moving drilling, etc., can solve the problem of high cost and achieve the effect of low cost, easy construction and easy operation

Active Publication Date: 2015-04-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The object of the present invention is a method for controlling the borehole trajectory of a three-dimensional horizontal well, so as to solve the problem that the existing three-dimensional horizontal well borehole trajectory control adopts high-end equipment and a rotary steerable system, resulting in excessive cost

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  • Three-dimensional (3D) horizontal well borehole track controlling method
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  • Three-dimensional (3D) horizontal well borehole track controlling method

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Embodiment Construction

[0039] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0040] Taking a three-dimensional horizontal well in Jinghe Oilfield, Ordos Basin as an example, the specific implementation process of the method for controlling the wellbore trajectory of the three-dimensional horizontal well of the present invention will be described in detail below. This well adopts ZJ40 Roman drilling rig, adopts conventional "screw drilling tool + MWD measurement system", selects F-1300 drilling pump, and is not equipped with top drive.

[0041] 1. Carry out drilling engineering design for horizontal wells according to drilling geological design. This embodiment adopts six-section wellbore trajectory, including one-dimensional vertical section, two-dimensional inclination section, three-dimensional well section, two-dimensional stabilizing section, two-dimensional inclination section and two-dimensional horizontal sect...

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Abstract

The invention relates to a three-dimensional (3D) horizontal well borehole track controlling method, and belongs to the technical field of oil and gas well drilling. The method comprises the steps of determining well drilling parameters according to well drilling equipment and formation lithology; measuring a borehole parameter by measurement-while-drilling tools, revising a formation vertical depth by using geological logging, designing points to be drilled according to known measuring points, regarding the vertical depth as a control target, continuously revising a 3D well section track until drilling to a 3D well section end turning direction; revising a target entering point vertical depth by using geological logging again, performing two-dimensional well drilling to a target point, and performing horizontal section well drilling by using reservoir lithology and horizontal section well inclining determination drilling tool assembly. The 3D horizontal well borehole track controlling method disclosed by the invention has the advantages that firstly the conventional well drilling and directional equipment is used, the cost is quite low, and promotional values are available; secondly, geosteering is performed by using conventional logging, the track is revised continuously, and the shooting precision is greatly improved; thirdly, the design and construction are integrated, the site directional construction is operated easily, and directional engineers construct conveniently.

Description

technical field [0001] The invention relates to a three-dimensional horizontal well borehole trajectory control method, which belongs to the technical field of oil and gas drilling. Background technique [0002] In the field of petroleum and natural gas, low porosity, low permeability and low pressure reservoirs are called "three low" reservoirs, which are characterized by low single well production. Sinopec North China Branch Jinghe Oilfield, Honghe Oilfield, Weibei Oilfield Both the Heluohe Oilfield belong to this type of "three-low" oil reservoirs. For example, the Jinghe Oilfield has a porosity of about 10%, a permeability of less than 0.5mD, an average pressure coefficient of less than 0.95, and an average horizontal well production of 3.5 tons per day. Therefore, it is necessary to save investment as much as possible during development and improve development efficiency. In order to save investment, the development of cluster horizontal wells is adopted, that is, more...

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Application Information

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IPC IPC(8): E21B7/04E21B47/022
CPCE21B7/04E21B47/022E21B47/04
Inventor 闫吉曾
Owner CHINA PETROLEUM & CHEM CORP
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