Oil layer recognition method based on tight reservoir conductive factor experiment

Abstract

The invention provides an oil layer recognition method based on a tight reservoir conductive factor experiment. The method comprises the steps of 1, obtaining horizontal rock cores of different depths of a reservoir; 2, obtaining the porosity and permeability of the horizontal rock cores, and calculating quality indexes; 3, measuring the specific resistance of the horizontal rock cores and the specific resistance of saturated salt water, and obtaining formation factors; 4, conducting nuclear magnetic resonance measurement to obtain a T2 spectrum, the total porosity, the effective porosity and the irreducible water saturation; 5, conducting an X diffraction and casting body thin section experiment; 6, according to the measurement and experiment results, building the relevant relationship between the formation factors and factors comprising the total porosity, the effective porosity, the pore throat size, distribution, connectivity and the like; 7, on the basis of the built relevant relationship, determining an oil layer recognition algorithm, and conducting oil layer recognition on the reservoir. By utilizing the oil layer recognition method, the reservoir conductive capacity and the factors affecting the reservoir conductive capacity can be analyzed according to tight reservoir experiment data, and the oil layer reservoir algorithm of the tight reservoir is determined according to the analyzed result.

Description

technical field [0001] The application belongs to the technical field of petroleum exploration and well logging, and in particular relates to an oil layer identification method based on an experiment of conductivity factors of tight reservoirs. Background technique [0002] China's oil and gas exploration has entered the era of "conventional oil and gas" and "unconventional oil and gas". Unconventional oil and gas represented by tight oil and gas has increasingly become the key and difficult areas of oil and gas exploration. A correct understanding of the electrical conductivity of tight reservoirs is of great significance for the research and establishment of oil and gas layer identification and reserve calculation methods suitable for tight oil and gas reservoirs. [0003] The electrical conductivity of rocks is often related to the rock's lithology, physical properties, and oil-gas properties. Oil layers can be identified and oil-gas saturation can be calculated based on...

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Problems solved by technology

The existence of this bottleneck problem makes well logging researchers know little about issues such as "the similarities and differences in rock conductivity between tight reservoirs and conventional reservoirs". Because of this, how to sample cores in the field, and Which supporting petrophysical experiments to carry out, how to conduct subsequent comprehensive experimental data analysis, and what are the key factors that affect the conductivity of tight reservoirs, etc., need to be studied and resolved urgently, which restricts the identification of oil and gas in tight reservoirs and oil and gas. Research and Application of Quantitative Evaluation Method

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