Method for correcting oil saturation based on liquid drainage phenomenon through oil-liquid ratio of rock core sidewall
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEM CORP
- Publication Date
- 2018-04-17
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Abstract
Description
technical field
[0001] The invention relates to the technical field of oilfield exploration and development, in particular to a method for correcting oil saturation by using the oil-liquid ratio of the side wall of the core during the coring period based on the liquid drainage phenomenon. Background technique
[0002] At present, the factors causing the core oil saturation error are complex and diverse, there are many mathematical correction methods, and there are many auxiliary correction data available:
[0003] 1. There are many factors causing the error of core oil saturation, and it is not feasible to directly correct each factor. For example, because the core needs to be stored in a -80°C freezer for several months, the water freezes into ice, causing the pores to freeze and crack. , the resulting pore change is actually difficult to correct; in addition, the volatilization of oil and water from core cutting and the volatilization of oil and water from long-term placem...