FIELD: oil production.
SUBSTANCE: method for selecting an acid composition for acid fracturing, taking into account the composition of oils with different acid compositions, using infrared spectroscopy in the visible, near ultraviolet and near infrared regions of light emission used in field and research laboratories for complex research composition of oils from various fields. A method for selecting an acid composition for intensifying oil production, selecting an acid composition involves preparing acid emulsions of various concentrations and compositions based on the original oil before acid fracturing and determining the stability of the resulting emulsion. The acid composition is selected based on a study of the infrared spectra of oil and acid compositions based on the original oil, while oil samples are taken from the selected well before acid fracturing is carried out. Then, an acidic composition of a certain concentration is prepared based on the original oil, after which studies are carried out to obtain data on the dependence of the optical density of the studied oil and acid emulsion on the radiation wavelength, a mathematical calculation is made to determine the aliphaticity coefficient Al, branching B3 and aromaticity Ar according to mathematical formulas. In this case, the coefficients Al - aliphaticity, B3 - branching and Ar - aromaticity of the studied oil and acid emulsion are determined 3 times with a step of 30 minutes, then the obtained values of the coefficients Al, B3, Ar are compared with the control sample, the acid composition at which an increase in the values of the aliphaticity and branching coefficients with a simultaneous decrease in aromaticity between the control oil sample and they conclude that the loss of asphaltenes from the oil in the formed acid emulsion does not occur.
EFFECT: increase in the efficiency of acid hydraulic fracturing.
1 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SELECTION OF ACID COMPOSITION FOR INTENSIFICATION OF OIL PRODUCTION | 2017 |
|
RU2663417C1 |
| COMPOSITION FOR IMPACT ON DOMANIC DEPOSITS | 2019 |
|
RU2733340C1 |
| ASSESSMENT OF ORGANIC MATTER CONTENT IN OIL-PRODUCING ROCKS CONTAINING TYPE II KEROGEN | 2021 |
|
RU2769531C1 |
| METHOD TO FORECAST STABILITY OF PROCESS FLOW OF HYDROCARBONS WITH USAGE OF NEAR INFRARED SPECTRA | 2009 |
|
RU2502984C2 |
| COMPLEX PROCEDURE FOR SELECTION OF ACID COMPOSITIONS FOR INTENSIFICATION OF OIL PRODUCTION IN DOMANIC DEPOSITS | 2019 |
|
RU2724832C1 |
| METHOD OF SYSTEMATIC SELECTION OF SOLVENT TO REMOVE ASPHALTENE-RESIN-PARAFFIN DEPOSITS CONSIDERING ESTIMATION OF ITS EFFECT ON KINETIC STABILITY OF OIL USING SPECTROPHOTOMETRIC INVESTIGATIONS | 2014 |
|
RU2570080C2 |
| EXTRACTION METHOD OF HARD-TO-RECOVER OIL RESERVES | 2019 |
|
RU2728176C1 |
| METHOD FOR DETERMINING COMPOSITION AND PROPERTIES OF FORMATION FLUID BASED ON FORMATION GEOLOGIC CHARACTERISTICS | 2019 |
|
RU2720430C1 |
| METHOD OF BENCH TREATMENT | 2009 |
|
RU2401381C1 |
| RHEOLOGY MODIFIER COMPOSITIONS AND METHODS FOR USE THEREOF | 2011 |
|
RU2559441C2 |
