DEVELOPMENT METHOD OF MULTILAYER OIL DEPOSIT USING HYDRAULIC FRACTURING OF FORMATION Russian patent published in 2014 - IPC E21B43/16 E21B43/26 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to development of multilayer oil deposits and can be used in oil and gas industry. The concept of the invention is as follows: the method includes pumping of displacement agent through injection wells, extraction of formation fluids through producing wells, performance of formation fracturing with obtainment of effective created fracture. According to the invention permeability is determined for each productive formation penetrated by the well. Productive formations are classified by permeability degree. Depending on permeability of the productive formation perforation is carried out in producing and injection wells. Injection wells are injected while in producing wells hydraulic fracturing is made in all productive formations. At that in productive formations with permeability less than 10 mD hydraulic fracturing is made with created fractures of fixed half-length more than 100 m and fixed width in the productive part from 1.5 up to 3 mm. In productive formations with permeability more than 100 mD hydraulic fracturing is made with created fractures of fixed half-length more than 40 m and fixed width in the productive part from 5 up to 20 mm. In productive formations with permeability from 10 up to 100 mD hydraulic fracturing is made with created fractures of fixed half-length from 40 up to 100 m and fixed width in the productive part from 3 up to 7 mm.

EFFECT: simplifying and cheapening of the development method for multilayer oil deposits, improving efficiency of the method usage at oil deposits consisting of productive formations with different permeability and porosity properties and decreasing the time period for development of multilayer oil deposits.

2 cl, 3 ex, 4 dwg