Method for down-hole multilevel micrologging for oil prospecting and electric coupler

Abstract

The present invention provides a method used for petroleum exploration downhole multi-grade micrologging and an electric coupler. An electric cable which can bear pull is used for connecting the electric coupler in series and putting the electric coupler into a well; after the depth requirement is achieved, the support leg of the electric coupler is stretched by supplying power and is contacted with a well wall stratum closely and stably; then a surface source is exploded to produce earthquake wave; the earthquake wave is transmitted into a wave detector in the electric coupler by the support leg; data are returned to a control recording instrument on the ground by the electric cable, and the collection of stratum data is achieved. The support leg of the electric coupler is controlled to close by reverse power supply and is departed from the well wall stratum, the electric coupler drives a ground roller to rotate, the electric coupler is sent to the next stratum for collecting, and the multi-grade micrologging construction is achieved.

Description

technical field [0001] The invention is a method and an electric coupler for multi-level micro-logging in an oil exploration well, which is mainly ground excitation, and multi-level downhole simultaneously receives data. Background technique [0002] In recent years, seismic exploration has continued to deepen into complex and difficult areas, and the requirements for exploration accuracy have become higher and higher. The complex near-surface structure has become a bottleneck for improving the quality of seismic exploration. The commonly used micro-logging investigation methods are: single-point excitation downhole, surface acquisition and only one-time acquisition. The coupling between the excitation point and the formation in the downhole is not good, and the accuracy of the collected data is low. If it encounters a squib, it cannot be supplemented. After a well is tested, it will become an abandoned well and cannot be reused as a production well, which increases the co...

AI Technical Summary

Problems solved by technology

The coupling between the excitation point and the formation in the downhole is not good, and the accuracy of the collected data is low

If you encounter dumb guns, you can’t make supplementary measurements. After a well is measured, it will become an abandoned well and cannot be reused as a production well, which increases the cost of drilling.

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