184results about How to "EOR" patented technology

An oil displacing method using the internal microbes in oil reservoir for the water injection region features that the microbe activator determined by the microbe kinds in the oil reservoir is injected in the stratum for higher pertroleum output. Its advantages are high effect and low cost.

The invention provides a CO2 drive oil-gas-water separate well injecting oil reservoir mixing drive development method, and belongs to the field for improving recovery ratio of an oil reservoir. The method comprises the following steps of: firstly, determining a development well pattern, well spacing and a development layer system of the oil reservoir; then, utilizing an overall process numerical simulation technique to determine advantage seepage direction and sweep efficiency of injection gas, designing an injection well in the advantage seepage direction of the injection gas as a water injection well, designing other injection wells as a gas injection well, forming water-gas mixed drive of partial water injected to well and partial gas injected into well; and finally determining the injection parameter of an injection production well and the development index forecast of a whole region. The method can form a water barrier in a gas channeling direction, thereby effectively controlling gas channeling, enlarging swept volume of the injected gas, and improving recovery efficiency; and the method provided by the invention has excellent guiding function on the gas injection drive oil well pattern, well type and injection and production parameter of a developed block and an undeveloped block, and the application prospect is wide.

The invention discloses a multilayer gas distribution full circulation carbonization furnace which comprises a furnace body, a discharge system and a slag discharge system, wherein the discharge system is arranged on the top of the furnace body, the slag discharge system is arranged at the bottom of the furnace body, the furnace body is divided into a carbonization section at the upper part and ageneration section at the lower part by an arched leg arranged at the middle part of the furnace body, a carbonization product outlet is arranged at the upper part of the carbonization section, an air supply system is arranged at the lower part of the generation section, a gas seal section which is communicated with a gas-seal gas inlet is arranged between the carbonization section and the generation section, and an annular gas distribution chamber which is communicated with an inner cavity of the carbonization section through a gas distribution hole and also communicated with a circulation gas inlet is arranged outside the carbonization section, a center gas collection cavity is arranged in the carbonization section, the upper end of the center gas collection cavity is closed, the lower end of the center gas collection cavity is communicated with the circulation gas inlet, a gas distribution hole is arranged at the middle part of the center gas collection cavity, and a generation gasoutlet is arranged at the upper part of the generation section. The invention has the advantages of small heat carrier jet radius, more uniform gas distribution and heating, high heating and oil production efficiency, and the like, can fundamentally avoid the oil firing phenomenon, makes up a blank of the kind of carbonization furnaces and is worthy of popularization and application.

The invention discloses an application of curdlan as a profile control agent in petroleum exploitation and an application method. The application method comprises the following steps of: (1) cooling a water injection well pipeline which needs plugging to 20-30 DEG C; (2) uniformly stirring fruit shell powder with water, injecting the mixed solution into the water injection well pipeline while stirring, and stopping injection when pressure at the port of the water injection well is observed; and (3) according to the injection method in the step (2), respectively injecting a composite plugging agent, curdlan, the composite plugging agent and the fruit shell powder, continuously injecting steam into the water injection well pipeline after injection of all the raw materials, and carrying out oil extraction. Used as a profile control agent, curdlan has advantages of high intensity of a gelling system, good plugging performance, strong compatibleness with stratum water and strong stability, which can guarantee validity during its application process, and also can be used for well completion and well workover after drilling well, fracturing and tertiary oil recovery.

The invention provides a surfactant as well as a preparation method and an application thereof. The surfactant comprises the following components by mass percent: 45%-65% of aliphatic alcohol polyoxyethylene ether sulfonate, 20%-35% of a cationic surfactant and 10%-20% of a surfactant assistant, wherein a molecular formula of the aliphatic alcohol polyoxyethylene ether sulfonate is CnH[2n+1]-(CH2CH2O)m-SO3Na, n is an any integer ranging from 12 to 15, and m is an any integer ranging from 2 to 5. The invention further provides the preparation method for the surfactant and the application of the surfactant to tertiary oil recovery of a carbonate reservoir. The surfactant is independently used, does not need to be added with alkali, and is free of damage to a stratum and an oil well; an oil washing system prepared from the surfactant can effectively change the wettability of a rock surface and strip off crude oil adsorbed on the surface of a carbonate rock, and the oil washing efficiency reaches more than 60%.