Horizontal drilling real-time seismogeology comprehensive guiding method

A horizontal drilling and geological technology, applied in drilling equipment and methods, drilling equipment, directional drilling, etc., can solve problems such as difficulty in effectively guiding horizontal well drilling in real time, and achieve the effect of efficient travel

Active Publication Date: 2017-01-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

At present, during the steering process of horizontal drilling, the steering model is basically fixed. When the steering model

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  • Horizontal drilling real-time seismogeology comprehensive guiding method
  • Horizontal drilling real-time seismogeology comprehensive guiding method
  • Horizontal drilling real-time seismogeology comprehensive guiding method

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[0028] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] Such as Figure 9 As shown, a real-time seismic-geological integrated steering method for horizontal drilling includes the following steps:

[0030] 1) In the known oil and gas field work area, interpret the existing 3D pre-stack time-to-depth seismic data, confirm the geological structure characteristics of the work area and the structural shape of the target oil and gas layer, and use the seismic section passing through the wellbore trajectory to be drilled as the initial guidance model;

[0031] 2) According to the core, mud logging and well logging data of the pilot hole drilled in the oil and gas field work are...

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Abstract

The invention discloses a horizontal drilling real-time seismogeology comprehensive guiding method. The method comprises the following steps that (1) three-dimensional prestack time deepened seismic data are explained in a known oil and gas field work zone, and an initial guiding model of a well to be drilled is obtained; (2) lithological, electrical and seismic reflection characteristics of marker beds, a target oil and gas layer and adjacent stratums in the oil and gas field work zone are determined; (3) before a forward drilled well enters the target, the velocity field is updated in real time, and an improved guiding model of the forward drilled well is obtained; (4) when the forward drilled well encounters one marker bed and is about to enter the tarter, the altitude depth of a target-entering point of the forward drilled well is predicted, and trajectory optimization before target entering is conducted; (5) after the forward drilled well enters the target, the velocity field is updated again, and thus the newest guiding model is obtained; and (6) under the guidance of the newest guiding model, a horizontal section guiding is conducted by combining with practical drilling analysis. According to the seismogeology comprehensive guiding method capable of correcting the guiding model in real time, the effects that the horizontal well enters the target layer accurately and efficiently penetrates through the target layer can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas development, in particular to a real-time seismic-geological comprehensive steering method for horizontal drilling. Background technique [0002] Horizontal drilling can greatly increase the oil and gas drainage area of ​​the target production layer and improve the recovery efficiency of oil and gas layers. It is the key to the efficient development of unconventional oil and gas reservoirs such as tight oil reservoirs and shale gas reservoirs. Steering plays a vital role in the drilling process of horizontal wells. It is the key to ensure that horizontal wells enter the target layer accurately and the horizontal section travels efficiently in oil and gas layers, and directly affects the single well productivity of horizontal wells. [0003] Traditional horizontal drilling steering generally includes: establishment of steering model before drilling, trajectory optimization before ...

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Application Information

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IPC IPC(8): E21B7/04G06F17/50
CPCE21B7/046G06F30/00
Inventor 廖朋张水山刘其军邓萍刘勇江
Owner CHINA PETROLEUM & CHEM CORP
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