Method and system for determining invasion depth of slurry filtrate

A technology of invasion depth and filtrate, applied in the field of exploration logging, which can solve the problems of complex influencing factors, low simulation accuracy, and many input parameters.

Active Publication Date: 2019-07-09
CHINA OILFIELD SERVICES
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Problems solved by technology

Since the theoretical simulation method is an indirect measurement, it has the disadvantages of

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  • Method and system for determining invasion depth of slurry filtrate
  • Method and system for determining invasion depth of slurry filtrate
  • Method and system for determining invasion depth of slurry filtrate

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[0017] The application describes a number of embodiments, but the description is illustrative rather than restrictive, and it will be obvious to those of ordinary skill in the art that within the scope of the embodiments described in the application, There are many more embodiments and implementations. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Except where expressly limited, any feature or element of any embodiment may be used in combination with, or substituted for, any other feature or element of any other embodiment.

[0018] This application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The disclosed embodiments, features and elements of this application can also be combined with any conventional features or elements to form unique inventive solutions as defined by the clai...

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Abstract

The invention discloses a method for determining the invasion depth of slurry filtrate. The method comprises the following steps: acquiring a time and conductivity curve graph in a sampling process ofa formation fluid pump; determining oil gas breakthrough time information and pure oil gas stabilization time information of the formation fluid based on the time and conductivity curve graph; establishing a formation fluid volume model according to the oil gas breakthrough time information, the pure oil gas stabilization time information and the known set pumping speed; and determining the invasion depth of the mud filtrate based on the formation fluid volume model.

Description

technical field [0001] This article relates to the field of prospecting well logging technology, especially a method and system for determining the invasion depth of mud filtrate. Background technique [0002] The invasion depth of mud filtrate is the basic parameter for logging evaluation of mud-contaminated reservoirs. The invasion of mud filtrate into oil and gas reservoirs is a complex physical process. At present, there are mainly two methods to obtain the invasion depth parameters of mud filtrate through experimental research and theoretical simulation. [0003] The experimental research is mainly to inject mud filtrate into the core to simulate the process of mud filtrate intrusion into the formation. By recording the experimental conditions and the amount of mud filtrate intrusion, the change of core resistivity is measured to obtain the depth of mud filtrate invasion. In the process of simulating the intrusion of mud filtrate into the formation through laboratory ...

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Application Information

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IPC IPC(8): E21B47/04E21B49/00
CPCE21B47/04E21B49/006
Inventor 刘海波王猛吴乐军杨玉卿徐大年李东李扬单哲
Owner CHINA OILFIELD SERVICES
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