DEVICE FOR DEVELOPMENT OF SUPER THICK OIL POOL Russian patent published in 2014 - IPC E21B43/24 

FIELD: oil-and-gas industry.

SUBSTANCE: device comprises two-face well with horizontal section and extra shaft with filter, well product extraction pump and accessory pipe string for heat carrier injection. In compliance with this invention extra horizontal shaft filter is arranged under case flow string of two-face well horizontal section at the distance of about 7 metres. Note here that dead packer is arranged on the side of said extra shaft, ahead of filter, while pump is arranged in two-face well on the face side communicated with extra horizontal section. Two accessory pipe strings are lowered from opposite face to seat concentrically in encased flow string of said horizontal section, Strings are equipped with injection lines at the face and connected with steam generation plants to circulate heat carrier in accessory strings without injection of heat carrier into bed with heating and decreasing super thick oil viscosity. Heat transducers are lowered in the interval of filter of said extra flow pipe string from the face side of two-face well. String annulus is communicated with pump unit for injection of hydrocarbon solvent via extra flow string filter into bed. Thermal transducers can output control signals for disconnection of steam generator station. Said solvent is injected into bed for liquefaction of heated super thick oil in the filter interval. Heated and liquefied super thick oil is extracted by pump via accessory pipe string. As this oil is extracted, oil temperature decreases and viscosity increases to over tolerable magnitude for liquefaction of super thick oil by hydrocarbon solvent in the fitter interval, thermal transducer outputs control signals to control station for initiation of steam generator. Note here that the process can reiterate.

EFFECT: higher oil displacement factor, higher reliability, ruled out premature water-flooding.

3 dwg