Method for correcting oil saturation based on liquid drainage phenomenon through oil-liquid ratio of rock core sidewall
A technology of saturation and core, which is applied in the field of correcting oil saturation by using the oil-liquid ratio of the core side wall during the coring period based on the liquid drainage phenomenon, which can solve problems such as swelling, oil and water liquid loss, and difficult correction of pore changes, and achieve Clear technical thinking, good operability, simple application effect
A technology of saturation and core, which is applied in the field of correcting oil saturation by using the oil-liquid ratio of the core side wall during the coring period based on the liquid drainage phenomenon, which can solve problems such as swelling, oil and water liquid loss, and difficult correction of pore changes, and achieve Clear technical thinking, good operability, simple application effect
CN107918918AActive Publication Date: 2018-04-17CHINA PETROLEUM & CHEM CORP +1
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[0020] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.
[0021] Such as figure 1 as shown, figure 1 It is a flow chart of the method for correcting oil saturation by core sidewall oil-liquid ratio based on liquid drainage phenomenon of the present invention.
[0022] Step 101, according to the production data of the oil area, confirm that the coring wells that need data processing or the adjacent wells have been put into production, and have oil production and liquid production data; it is also necessary to confirm that the core sealing rate is up to standard, and the coring wells have been put into production It means that oil production has started, and it has not been used for water injection or steam injection.
[0023] Step 102, for this type of coring well, the porosity overburden pressure correction...
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The invention provides a method for correcting the oil saturation based on a liquid drainage phenomenon through the oil-liquid ratio of a rock core sidewall, and the method comprises the steps: 1, determining a coring well, the data of which needs to be processed according to the production data of an oil field, or confirming that an adjacent well is put into production, wherein there is oil production and liquid production data; 2, carrying out the porosity compression correction of the rock core saturation, and obtaining the rock core oil saturation and water saturation after initial correction; 3, obtaining the proportion of initial discharged liquid crude oil through the solving of the original oil-liquid ratio; 4, obtaining the corrected oil saturation through the rock core oil saturation and water saturation after initial correction at step 2 and the original oil-liquid ratio obtained at a coring moment at step 3. The method provided by the invention is better in operability, isinnovative and practical, is easy for popularization, and provides a new feasible method for the correction of the oil saturation of the rock core.
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...
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Patent Timeline
17 Apr 2018
Publication
CN107918918A
- IPC
- G06Q50/02
- CPC
- G06Q50/02
- Inventors
- 吴兆徽; 刘西雷