Computing model of mud shale oil gas saturability

A mud shale and saturation technology, applied in the field of calculation model of mud shale oil and gas saturation, can solve the problems of complex wettability and inapplicability of water saturation model, and achieve remarkable application effect

Active Publication Date: 2015-06-17
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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Problems solved by technology

[0024] The purpose of the present invention is to solve the technology that the existing water saturation model is not applicable due to the existence of special minerals such as organic matter and pyrite in mud shale reservoirs, and the wettability is complicated (organic pores are wet with oil, and inorganic pores are wet with water). To solve this difficult problem, a method for establishing a model considering the wettability of shale and the conductivity saturation of mineral components is proposed

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  • Computing model of mud shale oil gas saturability
  • Computing model of mud shale oil gas saturability
  • Computing model of mud shale oil gas saturability

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Embodiment Construction

[0064] like figure 1 As shown, a calculation model for oil and gas saturation of shale is to first give the physical model of shale rock volume according to the mineral composition and pore type of the shale framework, and then deduce it from the physical model under appropriate assumptions. Shale conduction mathematical formula, and then give the calculation method of each parameter in the formula, the specific steps are as follows:

[0065] A. Establish an equivalent physical model: According to the shale skeleton mineral type and pore type, the shale rock volume physical model is given, and the shale is divided into two major systems and four major pore components. The two major systems are the organic matter volume system and the non-organic matter volume system, and the organic matter volume system includes the organic matter skeleton V TOC and organic matter pores φ TOC . Inorganic Volume System includes Inorganic Skeleton V nk and inorganic pores φ nk , the four ma...

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Abstract

The invention discloses a computing model of mud shale oil gas saturability. The computing model comprises the steps that A. an equivalent physical model is established; B. an assumed condition is given out; C. a mathematical model formula is determined; D. various parameters in the model are determined; E. rock electric experimental data formula parameter a, b, m and n fitting is carried out; and F. model verification is carried out. The non-Archie phenomenon of a mud shale oil storage layer caused by the problems that framework minerals are complex, a pore structure is complex, and pore wettability is complex can be avoided, the oil gas saturability of the mud shale storage layer is accurately computed, help is provided for a logging evaluation storage layer and oil field development, the unparalleled advantages which other saturability models do not have are achieved on mud shale water saturability computing are achieved, practical application effect is obvious, and accordingly great promotion value is achieved. In current public-published literatures and commercial application software, similar method providing and application do not exist.

Description

technical field [0001] The invention relates to a method for evaluating oil and gas saturation in the field of geophysical well logging in the petroleum exploration and development industry, in particular to a calculation model for mud shale oil and gas saturation. Background technique [0002] At present, there are three main methods to obtain the original oil saturation at home and abroad. One is to directly measure the cores obtained by oil-based mud coring or sealed coring; the other is to use the logging saturation interpretation model based on petrophysical experiments. , mainly including Archie's formula and its derived two-water model, two-porosity model, three-water model, etc.; the third is to use the capillary pressure curve to calculate the original oil saturation. key research content. [0003] In 1942, Archie established an experimental model for determining the water saturation of pure sandstone formations, effectively linked resistivity logging and porosity ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00G06F19/00
CPCE21B49/00G06F2219/00G16Z99/00
Inventor 孙建孟张晋言赵建鹏侯庆功李绍霞张文姣闫伟超
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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