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Saturation and free water surface calculation prediction method based on microscopic heterogeneity characterization

A technology of heterogeneity and prediction method, which is applied in earthwork drilling and production, complex mathematical operations, wellbore/well components, etc., can solve the problem of inaccurate calculation of the original saturation of the transition zone of the reservoir, and achieve precise and accurate prediction results. Reliable, improve efficiency and effect, improve the effect of reservoir and fluid understanding

Active Publication Date: 2020-02-21
PETROCHINA CO LTD +1
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problem that the conventional methods in the background technology cannot accurately calculate the original saturation of the reservoir transition zone

Method used

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  • Saturation and free water surface calculation prediction method based on microscopic heterogeneity characterization
  • Saturation and free water surface calculation prediction method based on microscopic heterogeneity characterization
  • Saturation and free water surface calculation prediction method based on microscopic heterogeneity characterization

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Embodiment 1

[0031] To Iraqi Halfaya Oilfield (HFY) development well M316, well M324, well M075, well M064 are processed as example, the specific implementation process of applying a kind of calculation prediction method of oil saturation and free water surface provided by the present invention comprises the following steps:

[0032] Step 1. Collect drilling, logging and interpretation results data, mercury injection curve data, reservoir fluid conventional or special PVT experiment data, perforation and oil test production data, oil and water well performance data for the target oil and gas reservoir.

[0033] Step 2. Carry out data quality control and cubic spline interpolation processing on the mercury injection curve data, and then use the Thomeer function to perform least square method fitting and extraction of microscopic heterogeneity parameters on the processed mercury injection curve data to obtain single The characterization parameters G, Pd and Bvinf of peak, bimodal and trimodal...

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Abstract

The invention relates to a saturation and free water surface calculation prediction method based on microscopic heterogeneity characterization. The problem that an existing conventional method cannotaccurately calculate the original saturation of an oil reservoir transition zone is mainly solved. The method mainly comprises the following steps: 1) collecting related data of a target oil reservoir; 2) achieving fitting of a Thomeer function curve and a mercury injection curve to obtain microscopic heterogeneity characterization parameters; 3) comparing and analyzing nuclear magnetic data and the like to confirm microscopic pore throat structure characterization parameters; 4) realizing nonlinear regression through deep research of a coring well mercury injection curve sample point, and obtaining a formula for predicting microscopic pore throat structure characterization parameters by using conventional logging information; 5) inputting related data, and iteratively calculating the water saturation and the free water surface depth; and 6) counting and analyzing a prediction result, and carrying out quality control and confirmation on application of the technology. The method can calculate the reservoir saturation and the free water surface depth accurately, and establishes a bridge understanding from microcosmic to macroscopic and understanding from static to dynamic.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to an analysis method for the distribution of pore diameters of oil-water saturation in tight reservoir rocks. Background technique [0002] At present, most domestic oil fields are in the late stage of development of high water-cut sandstone reservoirs, while carbonate reservoirs lack mature reservoir characterization technology for porous carbonate rocks. As Chinese oil companies enter the high-end oil market in the Persian Gulf Basin in the Middle East , reservoir evaluation and characterization technology is becoming more and more important and urgent, how to change from the microscopic heterogeneity characterization to the calculation of logging oil saturation and free water surface, which is very important for recalculation of reserves, classification of reservoirs, identification of water-flooded layers and Classification, reservoir stimulation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/15E21B49/00
CPCG06F17/15E21B49/00Y02A90/30
Inventor 赵常生徐志华刘宏生孙刚刘国超陈文林
Owner PETROCHINA CO LTD
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