Apparatus and method for well logging and data processing device

Patent metadata

Field	Value
Publication number	US-2016274265-A1
Application number	US-201615167490-A
Country	US
Kind code	A1
Filing date	May 27, 2016
Priority date	Dec 23, 2010
Publication date	Sep 22, 2016
Grant date	—

Abstract

The disclosure relates to an apparatus and a method for well logging as well as a data processing device thereof. Said apparatus for well logging comprises a drill collar body and an array of antennas, wherein said array of antennas comprises at least a pair of transmitting antenna and receiving antenna, said transmitting antenna and receiving antenna are configured for generating a curve of axial forward depth of investigation. By employing the method for well logging according to the present invention, not only the variation of resistivity in the axial forward formation may be measured in real time during the drilling, but also the interfacial characteristics of the axial forward formations having different resistivity may be discriminated during drilling.

First claim

1 .- 17 . (canceled)

18 . An apparatus for well logging, comprising:
a drill collar body; and an array of antennas, wherein said array of antennas comprises at least a pair of transmitting antenna and receiving antenna, said transmitting antenna and receiving antenna are configured for generating a curve of axial forward depth of investigation.

19 . An apparatus for well logging according to claim 18 , wherein said array of antennas comprises four transmitting antennas T 1 , T 2 , T 3 and T 4 , and four receiving antennas R 1 , R 2 , R 3 and R 4 .

20 . An apparatus for well logging according to claim 19 , wherein:
the array of antennas is installed from a drill-collar-tail to a drill-head of the drill collar body in the following order: the receiving antenna R 3 , the transmitting antenna T 3 , the transmitting antenna T 1 , the receiving antenna R 1 , the receiving antenna R 2 , the transmitting antenna T 2 , the transmitting antenna T 4 , and the receiving antenna R 4 ; the middle point between said receiving antennas R 1 and R 2 is the measurement point, said transmitting antennas T 1 and T 2 are installed symmetrically about the measurement point, and said transmitting antennas T 3 and T 4 are installed symmetrically about said measurement point; said receiving antennas R 1 and R 2 each have an installation angle of substantially zero; and said receiving antennas R 3 and R 4 are positioned on both ends of the drill collar body and are symmetrical about said measurement point, and the installation angles of said receiving antennas R 3 and R 4 are respectively set to be about 45° and −45 °.

Assignees

• China Petroleum & Chem Corp
• Shengli Drilling Tech Res Inst Of Sinopec

Inventors

• Yang Jinzhou
• Li Zuohui
• Lin Nan
• Wei Baojun
• Liu Qinglong
• Xiao Hongbing

Classifications

• E21B49/00

  Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells · CPC title

• G01V3/30 Primary

  operating with electromagnetic waves · CPC title

• G01V3/28 Primary

  using induction coils · CPC title

• E21B7/04

  Directional drilling · CPC title

• G01V3/08 Primary

  operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices (with electromagnetic waves G01V3/12) · CPC title