An evaluation method based on the effectiveness of shale reservoirs

Abstract

The invention discloses an evaluation method based on the effectiveness of mud shale reservoirs. According to the characteristics of mud shale reservoirs, lithofacies is determined as the basic evaluation unit, and oil generation, storage, reformability and mobility are selected as evaluation contents, and then a systematic analysis of influencing factors is carried out to optimize organic carbon content and hydrocarbon generation potential. The quantity, fracture type and development intensity, pore type and porosity, diagenesis, relative brittleness coefficient and brittleness index and critical flow aperture are used as evaluation parameters, and the gray fuzzy mathematical method is used to obtain the mud shale reservoir type.

Description

technical field

[0001] The invention relates to the research field of shale reservoirs, and more specifically relates to an evaluation method based on the effectiveness of shale reservoirs. Background technique

[0002] At present, the research on shale reservoirs at home and abroad is developing rapidly, the research scale is refined, quantitative and three-dimensional visualization, and the research on unconventional oil and gas accumulation tends to be systematic and theoretical, but for the basis of shale Research is relatively weak.

[0003] The three attributes of source, reservoir and cap of shale are integrated, and its oil generation, storage, preservation, reformability and fluidity all have an impact on shale reservoirs. Only those with good oil generation indicators and reservoir Shale reservoirs with good performance, good preservation conditions, and a certain flow capacity or flowable after artificial fracturing are effective. At home and abroad, rock mechan...

Images