METHOD OF OIL RESERVOIR DEVELOPMENT BY WELLS WITH HORIZONTAL END Russian patent published in 2015 - IPC E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: 3D seismic surveys are performed at the oil reservoir section. Cracks model is developed. Wells with horizontal end are designed and drilled considering cracks. Work agent is injected via the injection wells. Product is extracted via the production wells. At that cracks with length at least 10 m in horizontal and at least 2 m in vertical planes are separated. Horizontal wellbore is conventionally divided to sections, maximum 10. Each wellbore section is made with each crack crossing at angle 30-60°. In horizontal plane each section crosses maximum three cracks, distance between them is at least 10 m, and in vertical plane limitations are absent. The horizontal wellbore direction is made such that conditional middle lines of the wells made in horizontal and vertical planes will have square of correlation index at least 0.7 in relation to transition points of the well trajectory from one section to the other. At that conditional middle lines of bores of the production and injection wells are parallel.

EFFECT: increased oil recovery of the reservoir.

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