A high-resolution dual-electric dual-induction logging tool and method
An induction logging, high-resolution technology, used in earth-moving drilling, wellbore/well components, etc., to solve problems such as oil and gas information in difficult formations
Inactive Publication Date: 2017-05-31
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
However, with the increasing difficulty of exploration, the traditional dual-induction electrical logging technology has become increasingly difficult to accurately and truly reflect formation oil and gas information
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[0011] In conjunction with accompanying drawing, specific embodiment of the present invention is as follows:
[0012] Such as figure 1 As shown, a high-resolution double-electric double-induction logging instrument of the present invention consists of a power supply circuit 1, a main transmitting coil 9, a main receiving coil 5, auxiliary receiving coils (4, 6, 7), auxiliary transmitting coil 8, auxiliary The receiving coil (2, 10, 11, 12, 13), the insulator 3, the cable 14, the ground computer workstation 15, the measuring circuit 16, the insulating layer 17, and the stainless steel shell 18 are composed.
[0013] The stainless steel shell 18 is the main body of the instrument, made of stainless steel material resistant to high temperature and high pressure; the insulator 3 is mainly used to insulate and protect the electronic circuit from damage, and the insulator 3 is composed of high temperature resistant insulating material; the power supply circuit 1 is mainly Transmitt...
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The invention relates to a high-resolution double-electricity and double-induction logging instrument and a method. The high-resolution double-electricity and double-induction logging instrument comprises a power supply circuit, a main transmitting coil, a main receiving coil, auxiliary receiving coils, an auxiliary transmitting coil, an insulator, a cable, a ground computer workstation, a measuring circuit, an insulating layer and a stainless steel casing, wherein the insulator is made of a high-temperature resistant insulating material; the power supply circuit supplies alternating current to the main transmitting coil and the auxiliary transmitting coil; and the main receiving coil, horizontal compensation auxiliary receiving coils and longitudinal compensation auxiliary receiving coils receive response signals of a stratum, and the response signals are transmitted to the ground computer workstation through the cable. The method comprises the steps as follows: the main transmitting coil sends alternating current, the main receiving coil receives secondary induced electromotive force of the stratum, the signals are transmitted to the measuring circuit through a first pair of compensation coils at the same time, and the measuring circuit measures resistivity signals and permittivity signals of a rock stratum simultaneously. According to the high-resolution double-electricity and double-induction logging instrument and the method, resistivity and permittivity of the rock stratum are measured by the measuring circuit simultaneously.
Description
technical field [0001] The invention relates to a high-resolution dual-electricity and double-induction logging instrument and method, which are used for measuring the resistivity and permittivity of downhole formations in the logging process in the field of oil and gas field exploration, and analyzing the oil, gas and water information in the formations. Background technique [0002] In the existing logging technology, the high-resolution dual induction electrical logging technology focuses the main current and compensates the vertical and horizontal borehole and surrounding rock effects through the main and auxiliary coil circuits, and reflects the formation through two radial detection depths. Oil and gas information. However, with the increasing difficulty of exploration, it has become increasingly difficult for the traditional dual-induction electrical logging technology to accurately and truly reflect formation oil and gas information. The permittivity double inductio...
Claims
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IPC IPC(8): E21B49/08
Inventor 刘红岐邓友明
Owner SOUTHWEST PETROLEUM UNIV