Altered volcano rock effective reservoir determination method ad device in oil-gas exploration
A technology for volcanic rocks and oil and gas layers, which is applied in the field of determination of effective reservoirs of altered volcanic rocks in oil and gas exploration, which can solve the problems that the effective reservoirs of altered volcanic rocks cannot be accurately determined, and achieve the effect of meeting production needs and improving determination accuracy
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Problems solved by technology
 Such as Picture 9 Shown is a flowchart of the method for evaluating the effective reservoir of altered volcanic rock and predicting the oil and gas productivity of the embodiment. include:
 Step S901: According to the geological conditions of the study area, determine the volcanic rock development interval of the processed well and the main volcanic rock type;
 In this embodiment, the volcanic rock type of the well section to be processed is determined according to data such as rock slices and geochemical analysis.
 Step S902: select different unaltered volcanic rock parameter values of the processed well section in the study area;
 In this example, the sonic time difference Δt of different volcanic rock types that are not altered in the treated well section is determined ma , Lithological density ρ base , Compensated neutron CNL base , Natural gamma GR base .
 Use the following formula to obtain the total porosity...
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