METHOD OF THERMAL DEVELOPMENT OF DEPOSITS OF SOLID HYDROCARBONS Russian patent published in 2004 - IPC

FIELD: development of gas-hydrate deposits .

SUBSTANCE: the invention presents a method of thermal development of deposits of solid hydrocarbons and it is dealt with the field of development of deposits of hydrocarbons, in particular - gas-hydrate deposits. The technical result of the invention is provision of an intensification of processes of a heat transfer between seams and reduction of costs of production and injection of heat-transfer agent. The method includes a drilling-out of a deposit by a borehole crossing the seams with system of horizontal lateral sections, shaping of a thermal field in one of the seams and withdrawal of hydrocarbons from another seam. At that boring of the indicated borehole is conducted with making two horizontal steps accordingly in the upper productive and lower seams, from which the boring is exercised at least in two lateral horizontal holes in each seam, meeting each other on a calculated docking trajectory with formation of closed circulation channels between seams. The borehole around space is sealed by installation on the ends of the horizontal holes of casing string-borehole outer packers and exercise a discretic perforation of the mentioned holes with formation of two sections of perforation in the beginning and at the end of each hole. Then execute delivery under action of a differential head between the seams of hot water from the lower seam into the upper one and a forced feed of chilled water from the upper seam into the lower one till recovery of the collecting properties of a pay. Then they close sections of the lateral holes between the perforated sections by the casing string inner packers to stimulate connections of the disconnected perforated sections with the boreholes around spaces. At that in process of operation they maintain continuous circulation in the formed close circulation channels of the hot water from the lower seam and the cooled water from the upper seam. The received products of hydrates decomposition gas and water are fed for separation into the separator.

EFFECT: intensification of processes of a heat transfer between seams and reduction of costs of production and injection of heat-transfer agent.

3 cl, 4 dwg