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Petroleum drilling fluid nuclear magnetic resonance while-drilling analytic

A nuclear magnetic resonance and oil drilling technology, applied in the field of drilling fluid logging, can solve problems such as inability to adapt, inability to accurately determine the properties of formation fluids, inability to determine the exact composition of oil and gas content, etc.

Inactive Publication Date: 2012-11-21
重庆奥能瑞科石油技术有限责任公司
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  • Application Information

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Problems solved by technology

[0003] The disadvantages of the existing petroleum geological drilling fluid logging technology are: none of the existing petroleum drilling fluid logging methods at home and abroad can judge the oil and gas content, the oil-water ratio of the formation output and the oil and gas ratio from the drilling fluid returned from the wellhead while drilling. exact composition
It is difficult to detect the oil and gas content in powdery cuttings, and it is impossible to accurately judge the properties of formation fluid during drilling, and it cannot meet the needs of modern drilling technology

Method used

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  • Petroleum drilling fluid nuclear magnetic resonance while-drilling analytic
  • Petroleum drilling fluid nuclear magnetic resonance while-drilling analytic
  • Petroleum drilling fluid nuclear magnetic resonance while-drilling analytic

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Embodiment Construction

[0046] Such as figure 1 Shown: the invention proposes a kind of oil drilling fluid nuclear magnetic resonance analysis method while drilling, carry out as follows:

[0047] Step 1. Sampling:

[0048] Through the circulation system of the oil drilling rig, samples are taken continuously at the inlet and outlet of the drilling fluid respectively to form the sample sequence a at the inlet and the sample sequence b at the outlet. The sample volume taken each time is 40ml, and the sample is sealed in the NMR sample box;

[0049] The NMR sample box is made of borosilicate glass material that does not absorb radio frequency radiation, and the sampling time or sampling depth is marked on the box surface.

[0050] Such as figure 2 Shown: Step 2, spectrum collection:

[0051] In the high-frequency nuclear magnetic resonance drilling fluid analysis instrument, draw 1 H and 13 C Relaxation spectra of two kinds of nuclei T1 and T2;

[0052] The acquisition environment of the relaxa...

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Abstract

The invention discloses a petroleum drilling fluid nuclear magnetic resonance while-drilling analytic method which is characterized in that the method comprises the following steps of: sampling, serial sampling is respectively carried out at a drilling fluid inlet and at a drilling fluid outlet; map collection, relaxation maps of 1 H and 13 C are drawn; map transformation, the two relaxation mapsare processed by pulse fourier transformation to form a rameau frequency spectrum; differential spectrum processing, a stratum fluid resonance spectrum is obtained; the synthesized geological interpretation is carried out, and a map library is established; a synthesized interpretation map is drawn up; the related data in a logging database, a 1H nuclear magnetic resonance map and a 13C nuclear magnetic resonance map are combined to form a petroleum drilling fluid nuclear magnetic resonance while-drilling analytic map. The method has the obvious effects that the drilling fluid is continously and quickly analyzed in an oil drilling field on line; and the characteristics of the stratum fluid carried over in the drilling fluid is determined; the characteristics of the stratum fluid can be precisely judged in the while-drilling process without needing sampling the contents of oil gas in a core or rock debris; and the method is suitable for the requirements of the modern drilling technique.

Description

technical field [0001] The invention belongs to the drilling fluid logging technology in geological logging engineering on the oil drilling site, and mainly relates to a nuclear magnetic resonance analysis method for oil drilling fluid while drilling. Background technique [0002] Although the traditional drilling fluid logging method can detect whether there is oil and gas in the formation from the drilling fluid returned from the wellhead, it cannot accurately detect the production ratio of oil and water in the formation that produces water at the same time, let alone determine the exact amount of oil or natural gas. Element. Since the mid-1990s, domestic and foreign petroleum industries have gradually introduced nuclear magnetic resonance analysis technology into comprehensive mud logging while drilling, but so far it is still limited to the analysis of formation physical properties (including Formation porosity, permeability, etc.). The nuclear magnetic resonance analy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/08G01N24/08
Inventor 朱根庆王志战李春山朱直箐
Owner 重庆奥能瑞科石油技术有限责任公司
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