High-density electric pipeline detection and observation method and system along pipeline direction
A high-density electrical method and high-density technology, applied in the field of high-density electrical observation system, can solve the problems of small abnormal scale, large depth error, unsatisfactory imaging effect, etc., and achieve the effect of capacity improvement
Active Publication Date: 2020-11-17
中石化石油工程技术服务有限公司 +2
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide an oil and gas pipeline that can be used for deep buried oil and gas pipelines with small abnormal scale, low detection accuracy, large depth error and unsatisfactory imaging effect in the prior art. Long-distance oil and gas pipelines, detection of larger abnormal scales, and high-density electric pipeline detection and observation methods and systems along the pipeline without restrictions on the application area
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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0031] The high-density electric pipeline detection and observation method along the pipeline direction of the embodiment of the present invention comprises the following steps:
[0032] S1. According to the buried depth and diameter of the oil and gas pipeline, establish a horizontal hollow cylinder as the basic model of the oil and gas pipeline to be tested, and carry out the forward modeling of the basic model;
[0033] S2. According to the forward modeling results, select the device type and working parameters of the high-density electrical instrument;
[0034] S3. Lay out high-density electri...
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The invention discloses a high-density electrical method pipeline detection and observation method and a high-density electrical method pipeline detection and observation system along a pipeline direction. The high-density electrical method pipeline detection and observation method comprises the steps of: establishing a horizontal hollow cylinder as a basic model of an oil and gas pipeline to be detected according to a buried depth and an aperture of the oil and gas pipeline, and performing forward modeling; selecting a device type and working parameters of a high-density electrical method instrument according to a forward modeling result; laying a high-density electrical method measuring line along a direction parallel to the oil and gas pipeline; measuring two-dimensional high-density resistivity; performing two-dimensional inversion on acquired data of the high-density electrical method measuring line, or combining and splicing data of a plurality of two-dimensional high-density electrical method measuring lines, so as to obtain volume data related to abnormalities of the oil and gas pipeline, then performing three-dimensional high-density electric method inversion, and analyzing change features and laws of the abnormalities by means of produced horizontal and vertical slice maps; and finally, providing plane position and buried depth parameter information of the oil and gaspipeline to be detected according to the 2D or 3D inversion result, and guiding pipeline operation and maintenance as well as construction in the vicinity of the pipeline.
Description
technical field [0001] The invention relates to the technical field of a high-density electrical observation system for oil and gas pipeline detection, in particular to a method and system for high-density electrical pipeline detection and observation along the pipeline. Background technique [0002] In order to carry out dynamic operation and maintenance and management of underground oil and gas pipelines, reduce the damage and impact of human mechanical activities on underground oil and gas pipelines, and under the premise that the as-built drawings of pipelines cannot be obtained accurately, in order to determine the plane position and buried depth of oil and gas pipelines, the non-excavation large-scale Deeply buried oil and gas pipeline detection technology emerges as the times require. [0003] The current detection methods include ground high-precision magnetic survey, borehole magnetic gradient measurement, cross-well electromagnetic wave CT, ground penetrating radar...
Claims
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IPC IPC(8): G01V3/08
CPCG01V3/088
Inventor 卫东张忠坡姚本全汪卫毛陈木森杜辉辉王友胜
Owner 中石化石油工程技术服务有限公司