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Method for determining carbonate reservoir saturability

A carbonate reservoir, saturation technology, applied in earthwork drilling, wellbore/well components, etc., can solve problems such as large calculation errors, and achieve the effect of a reliable calculation method

Inactive Publication Date: 2015-07-22
付茜
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many factors that affect the resistivity. Therefore, the water saturation value calculated by the formula is prone to large calculation errors without considering other influencing factors.

Method used

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  • Method for determining carbonate reservoir saturability
  • Method for determining carbonate reservoir saturability
  • Method for determining carbonate reservoir saturability

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Embodiment Construction

[0027] The method for determining the saturation of carbonate rock reservoirs in the present invention will be described in detail by taking a certain oil reservoir in XX group in XX basin.

[0028] Step 1: Establishment of J function of capillary pressure in carbonate reservoir

[0029] J ( S wn ) = ( H w - H ow ) ( ρ w - ρ 0 ) gC σ cos θ K φ + ln ...

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Abstract

The invention relates to a method for determining carbonate reservoir saturability. The method for determining the carbonate reservoir saturability is applied to the determination of heterogeneous carbonate reservoir water saturability. Firstly, a carbonate reservoir saturability capillary tube pressure function is established, standardization is performed on the carbonate reservoir oil-water transition zone electric-log interpretation water phase saturability of each oil well, then polynomial regression is performed with the capillary tube pressure J function, and an iteration method is used to determine the carbonate reservoir saturability. The method for determining the carbonate reservoir saturability has the advantage that a reasonable and reliable calculation method is provided for the calculation of the heterogeneous carbonate reservoir water saturability lack of core data.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a method for determining the saturation of carbonate reservoirs. Background technique [0002] The key to 3D reservoir geological modeling is how to determine the original water saturation, which is of great significance to reservoir dynamic evaluation, reserve calculation, and development plan formulation. Accurately calculating the saturation of heterogeneous carbonatite reservoirs has always been a major problem in logging interpretation work in the absence of sealed coring and other data to directly determine the water saturation of cores. Due to changes in geological movement, the reservoir pore structure and fluid parameters will change greatly, and the capillary pressure data obtained by mercury injection method cannot accurately calculate the original water saturation. At the same time, in the past, the saturation of carbonatite reservoirs was mostl...

Claims

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Application Information

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IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 付茜
Owner 付茜
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