Core analysis method used for determining tight oil and gas reservoir dominant lithogenous phase

Abstract

The invention relates to an analysis method used for determining dominant lithogenous phase in tight oil and gas reservoir exploration and development processes, and especially relates to a method used for obtaining the dominant lithogenous phase and predicting lithogenous phase space distribution and oil gas energy production by subjecting lithological characters, physical properties, oiliness and the lithogenous phase of microfacies sections of sand bodies of the core to correlation analysis, and statistics on lithogenous phase type and relative amount of the lithogenous phase. The core analysis method is used for solving a problem that prediction on tight oil favorable reservoir with low resource abundance is difficult to realize because that existing lithogenous phase analysis technology can only be matched with conventional oil and gas data. The analysis method on tight oil reservoir dominant lithogenous phase is accurate, possesses practicability, and is convenient for popularization. According to the core analysis method, macroscopic description on core samples and microcosmic determination are combined, so that determination and cause representation on reservoir performance of the tight oil and gas reservoir dominant lithogenous phase can be realized with high accuracy.

Description

Technical field: [0001] The present invention relates to an analysis technique for determining dominant diagenetic facies in the process of exploration and development of tight oil and gas reservoirs, in particular to performing correlation analysis on the lithology, physical properties, oil-bearing properties and diagenetic facies of each sand body microfacies section of the core to count diagenetic facies Based on the type and its relative content, the dominant diagenetic facies can be obtained, and then the spatial distribution of diagenetic facies and oil and gas productivity can be predicted. Background technique: [0002] Diagenetic facies, as an important research branch of sedimentology in petroleum basins, is the core element that determines the effectiveness of clastic rock reservoirs and their oil and gas enrichment. The transformation of sediment development by factors such as pressure and other factors plays an important indicative role in determining the distri...

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Problems solved by technology

In view of the relatively complex geological conditions dominated by continental basins in my country, the vertical and horizontal heterogeneity is significantly enhanced due to the joint influence of sedimentation and diagenesis, and conventional diagenetic facies understanding and analysis methods are not enough to effectively predict tight oil reservoirs Favorable zone distribution of layers

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