Method for predicating productivity of nonhomogeneity ancient karst carbonate reservoir
A carbonate rock and prediction method technology, which is applied in the field of geological exploration to achieve the effects of optimizing key parameters, improving productivity prediction accuracy, and improving accuracy
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Embodiment 1
[0074] A productivity prediction method for heterogeneous paleokarst carbonate rock reservoirs, comprising: determining parameters related to productivity according to the interrelationship of lithology, physical properties, electrical properties, and oil and gas properties, including matrix porosity (physical properties), Deep lateral resistivity (connectivity), Stoneley wave energy attenuation (permeability), fracture and vug development degree (surface vug ratio), total hydrocarbon value (logging gas content display), and processed by reservoir parameters , the reservoirs are divided into categories I, II, and III (porosity Ф≥7% is category I, 7%> porosity Ф≥4% is category II, 2% ≤ porosity Ф<4% is category III.) . Then the principal component analysis method is used for reconstruction and optimization to determine the key parameters related to productivity, namely matrix porosity (physical properties), Stoneley wave energy attenuation (permeability), surface vug ratio, and...
Embodiment 2
[0128] According to the "four properties" relationship (interrelationship among lithology, physical property, electrical property and oil-gas content), the present invention determines information related to production capacity, including: reservoir rock mineral composition, porosity, reservoir thickness, deep side Many parameters such as resistivity, porosity, Stoneley wave energy attenuation, and total hydrocarbons can be obtained. At the same time, through the processing of reservoir parameters, the reservoirs are divided into I, II, and III types, and the principal component analysis (PCA) method is used for transformation and optimization to determine the key parameters closely related to production capacity. And give the corresponding weight coefficient, calculate the reservoir quality comprehensive evaluation index (RQ), so as to establish the production capacity prediction method.
[0129] The technical scheme of the method in the present invention is specifically desc...
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