Method for constructing drilling fluid formation oil identification plate and drilling oil layer identification method

A drilling fluid and formation technology, which is applied in the field of drilling fluid formation oil identification chart and oil formation identification field, which can solve problems such as incompatibility

Active Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, this method is ineffective for drilling fluids in water-in-oil systems because the relaxation agent cannot penetrate the oil film and inhibit the signal of the water molecules it encapsulates.
In addition, this method is not suitable for online measurement

Method used

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  • Method for constructing drilling fluid formation oil identification plate and drilling oil layer identification method
  • Method for constructing drilling fluid formation oil identification plate and drilling oil layer identification method
  • Method for constructing drilling fluid formation oil identification plate and drilling oil layer identification method

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Embodiment Construction

[0036] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0037] Also, in the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without the specific details or in the particular manner described.

[0038]In addition, the steps shown in the flow diag...

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Abstract

The invention discloses a method for constructing a drilling fluid formation oil identification plate for drilling oil layer identification and a drilling oil layer identification method. The method for constructing the plate comprises the following steps: adding base oil with different masses into original drilling fluid, and respectively carrying out T1-T2 two-dimensional nuclear magnetic resonance measurement to correspondingly obtain a drilling fluid water signal centroid and a base oil signal centroid; adding formation oil with different masses, densities or viscosities into an original drilling fluid, and respectively carrying out T1-T2 two-dimensional nuclear magnetic resonance measurement to correspondingly obtain a formation oil signal centroid; and projecting the drilling fluid water signal centroid, the base oil signal centroid and the formation oil centroid into a preset rectangular coordinate system in a distinguishable manner, and constructing to obtain a drilling fluid formation oil identification plate. The method overcomes the inadaptability of T2 one-dimensional nuclear magnetic resonance to on-line measurement and an oil-based drilling fluid system, and is simpler to operate, lower in cost, more accurate in identification and wider in application range.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a method for constructing a drilling fluid formation oil identification plate for identifying oil layers encountered in drilling and a method for identifying oil layers encountered in drilling. Background technique [0002] A pure fluid has only one relaxation peak. Low-field nuclear magnetic resonance is an effective technology for identifying and evaluating the oiliness of drilling fluids. 2 One-dimensional spectral technique. T 2 During the implementation of one-dimensional spectrum technology, two analyzes need to be carried out before and after the addition of relaxation reagents to determine whether there is a superposition of oil and water signals or whether the new peak in drilling fluid is an oil peak or a water peak. [0003] However, this T-based 2 There are many problems in the discrimination method of one-dimensional spectrum techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
CPCG01N24/081Y02A90/30
Inventor 王志战李新倪卫宁李三国崔谦
Owner CHINA PETROLEUM & CHEM CORP
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