Comprehensive Logging Evaluation Of Shale Reservoir In Y Oil Field

Shale gas is a new type of clean energy.Its formation and enrichment has its own uniqueness.Its collection process is mainly carried out on the basis of hydrocarbon generation,with the characteristics of raw material storage and integration.Shale gas exploration and development prospects are broad,but the evaluation methods for shale gas reservoirs in China are still not perfect.Therefore,it is urgent to carry out evaluation of source rock and evaluation of reservoir space.This paper mainly evaluates the logging of the shale production and storage process,ie the evaluation of source rock and the assessment of reservoir space and physical parameters,and establishes evaluation methods and interpretation models for the physical and gas content of the study area.In the aspect of geological feature evaluation,the lithological characteristics,physical properties,reservoir properties,and gas-bearing characteristics of shale are mainly analyzed,and the conventional logging response characteristics of shale gas reservoirs and array acoustic logging response are also analyzed.In terms of source rock evaluation,the characteristics of shale formation were analyzed,mainly organic matter abundance,organic matter type and organic matter maturity,and the organic carbon content was evaluated by logging,and a variety of organic carbon content logs were established.Evaluation models,such as,linear fitting method,acoustic-resistivity overlapping method,and improved acoustic wave resistivity overlapping method,etc.In terms of pore structure characterization of shale gas reservoirs,shale pore types were analyzed by scanning electron microscopy,nitrogen adsorption,and mercury porosimetry,and the pore size distribution was quantitatively characterized;in terms of physical property parameters evaluation,based on the physical properties of the study area characteristics,established a well logging interpretation model for porosity,permeability,and saturation applicable to the study area.In terms of gas content evaluation,the principle of isothermal adsorption and experimental measurement methods are mainly introduced,and the influencing factors of adsorption gas are explained.Well logging interpretation models suitable for adsorption gas and free gas in the study area are established,and the total number of study areas is determined.Gas content,and compared with experimentally measured gas-bearing ratio,verified the applicability of gas-bearing logging interpretation model.