SU717290A1 - Method of monitoring oil field exploatation - Google Patents

Description

METHOD OF CONTROL OVER THE DEVELOPMENT

(54) PETROLEUM

The invention relates to the oil industry and can be used to track the progress of water-oil contact during the development of oil fields. There is a method of monitoring the development of oil fields I, including the sampling and analysis of oil and formation water, comparing the composition of salts in and formation water in time l3. . The disadvantage of this method is. the need for a significant difference in the compositions of the salts of the residual and boundary plate water. Also known is a method of monitoring the development of a petroleum reservoir, including oil sampling, analysis and determination of the distance from the oil-and-water reservoir to the well filter, in which the dynamics of oil flow in the reservoir 2 are determined by the time variation of the radioactivity of the oil. The quality of control over the development of the oil reservoir is inadequate. The purpose of the invention is to improve the quality of control over the development of oil deposits. This is achieved by determining the content of benzene in the aqueous extracts from the oil samples and by its absolute value and time variation, the distance from the oil-water contact to the well filter is judged. The proposed method is carried out as follows. At the initial moment of development of a deposit of oil samples from wells located at different hypsometric elevations are selected. The benzene content in the aqueous extracts from these samples was removed by the methods of MHHXirn and IHRGI. By any known method, the dependence of the benrol content in the aqueous extracts from the samples on the hypersometric marks of the sampling sites was cut. The benzene content in the water draw of a wellbore sample is determined, for which it is necessary to establish its distance to the water-oil contact. Then, the distance from the filter of the test well to the water-oil contact is determined by the amount of benzene in the water extract from the sample taken from the well and by the established dependence of the benzene content on the hypsometric sampling mark. The benzene content in water drains from samples taken from wells at the initial moment of reservoir development is given in the table.

3.00

3880

34 According to the table. 1 calculated the dependence of benzene content in water extracts from samples, OTo6paHia, ix in wells, from i hypsometric marks of sampling sites. During the development of a deposit, it became necessary to determine the position of the water 20 Formula and 3 O and the oil contact. A sample of oil was taken from well No. 48. Her analysis showed that the benzene content in the water extract on this sample was 1.12 mg / l. Comparing the results of this analysis with the established dependence of the benzene content in the aqueous extracts from the samples from the hypsometric extractors of the sampling sites, we determine that the current position on the oil-water contact is at around 4200 m. and reducing the cost of research to monitor the development of oil fields. The method of monitoring the development of oil deposits, including the sampling of oil, their analysis and the determination of the distance from the water-oil contact to the well filter, from the fact that, in order to improve the quality of the counter, the content of benzene in water extracts from samples of oil and its absolute value and time variation will be dispersed from the oil-water contact to the well filter. Sources of information taken into account during the examination 1. Authors certificate of the USSR Ms 181577, cl. E 21 B 47 / 1O, 1963 2. USSR author's certificate No. 449145, cl. E 21 B 43/00, 1973 (prototype).

Claims (1)

Claim A method of monitoring the development of an oil deposit, including sampling oil, analyzing them and determining the distance. from the oil-water contact to the well filter, in which, in order to improve the quality of control, the benzene content in the water extracts from oil samples and its absolute value and the change in time are judged on the distance from the oil-water contact to the well filter.