| 简介 |
FIELD : mining.
SUBSTANCE : in the process of hydrocarbon fluids pool development that includes construction of a recovery horizontal well over the sole of the productive formation, in parallel to the recovery horizontal well in one direction and at the same depth the second recovery horizontal well is constructed, the injection horizontal well is made double-hole and constructed between the recovery horizontal wells in parallel and in the opposite direction, where the the lower hole of the horizontal double-hole injection well is at the same depth as the recovery horizontal wells, and the upper hole of the horizontal double-hole injection well is located over the lower hole. A pipe string with a plugged end and openings on the end part for injection of working substance is lowered into each injection well hole. The pipe section with openings on both ends is bound with packers, heated working substance is injectected into the productive formation, the productive formation is heated up to the ignition temperature of the in-situ hydrocarbon fluid, rare working substance is replaced with an oxygen-containing working substance, the hydrocarbon fluid is ignited in the formation. The formation is heated up between wells tracking and maintaining the conditions to preserve and propagate the combustion front. In the area of the horizontal section of the recovery wells the section temperature is brought up to the yield of the hydrocarbon fluid, the heated product is selected, while the intensity of the formation combustion and heating process in the inter-well and the surrounding space is controlled with the temperature and pressure monitoring devices, the formation temperature is maintained within the required limits by changing the feed rate of the supplied working substance. The working substance injection is suspended after the productive formation zone is completely exhausted within the first step of the packers installation, the pipe with openings and two bounding packers is transferred towards the recovery wells mouths for at least the distance between the packers, the packers are brought into operation and refinement of the next productive formation zone is resumed working through the entire horizontal part of the injection well, waterproofing sealant is injected into the exhausted formation.
EFFECT : increase production of hydrocarbon energy resources, ensuring control and regulation of in-situ combustion and heating of rock formation.
2 cl, 2 dwg, 1 ex |
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