METHOD FOR DEVELOPMENT OF OIL DEPOSIT BY HORIZONTAL BORE-HOLES Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: according to method, after driving in well of main transporting horizontal bore-hole, performed over its entire length from bottom hole to bed roof is flow-rate measurement. According to results of flow-rate measurements, detected are operating sections of bed adjacent to main transporting horizontal bore-hole, and also non-operating sections of bed. After that, drilled from main transporting horizontal bore-hole to non-operating section of bed are branch dipping bore-holes of wave-like profile. Upon that, as drilling of branch dipping bore-holes of wave-like profile nears completion, undertaken is flow-rate measurement. According to data received from flow-rate measurements, detected are operating sections of bed adjacent to branch dipping bore-holes of wave-like profile. Then, with respect to operating sections of bed, determined is succession of drilling and direction of drilling of subsequent horizontal bore-holes and additional branch dipping bore-holes. Such bore-holes are driven in operating sections of bed from main horizontal transporting bore-hole. After that, wells are put in operation for oil recovery. In this case, additional branch dipping bore-holes in each well are put in operation for oil recovery successively beginning from bottom hole of main transporting horizontal bore-hole towards roof of bed. Application of aforesaid method ensures multiple increase current oil recovery together with enlargement of final oil extraction. EFFECT: higher efficiency.