281results about How to "Increase oil production" patented technology

A method for enhancing recovery of crude oil from a porous subterranean formation of which the pore spaces contain crude oil and connate water comprises:—determining the Ionic Strength (Mol/l) of the connate water; and—injecting an aqueous displacement fluid having a lower Ionic Strength (Mol/l) than the connate water into the formation, which aqueous displacement fluid furthermore has an Ionic Strength below 0.15 Mol/l. FIGS. 13 and 16 and Table 4 demonstrate that injection of an aqueous displacement fluid with lower Ionic Strength than the connate water improves oil recovery (IOR).

A method to guide a drilling path of a second well in proximity to a first well including: applying a time-varying electrical current to a conductive casing or liner of the first well; from the drilling path of the second well, sensing an electromagnetic field generated by the current in the first well, and guiding the drilling path trajectory of the second well using the sensed electromagnetic field.

The invention relates to a camellia oleifera Abel planting method and belongs to the technical field of plant planting. The method comprises the following steps: cutting, cutting management, seedling hardening, management before transplanting, field transplanting and field management. According to the camellia oleifera Abel planting method, through a reasonable cutting management method and camellia oleifera seedling fertilization and topdressing management, the survival rate and growth rate of the cutting seedlings are greatly improved; meanwhile, the camellia oleifera Abel can bear fruits after three years, and enter a full bearing period after five to six years; fruit-bearing rate is high; and oil extraction rate of the fruits is high.

The invention provides an underground two-stage cyclone separator, which comprises an outer pipe, a first-stage cyclone separator, a second-stage cyclone separator and a rich oil flow channel, wherein the outer pipe is provided with a produced fluid inlet; the first-stage cyclone separator is arranged in the outer pipe, and comprises a first pipe wall and a first inner cavity in the first pipe wall; a first inlet, a first rich oil overflow channel and a first rich water drainage channel are formed in the first inner cavity; the second-stage cyclone separator is arranged in the outer pipe, and comprises a second pipe wall and a second inner cavity in the second pipe wall; a second inlet, a second rich oil overflow channel and a second rich water drainage channel are formed in the second inner cavity; the rich oil flow channel is arranged in the outer pipe, and is connected with the first rich oil overflow channel and the second rich oil overflow channel; the first-stage cyclone separator is connected in series with the second-stage cyclone separator; the first inlet is communicated with the produced fluid inlet; and the first rich water drainage channel is connected with the second inlet.

In algae, the conditions for optimal production of biomass are different than the optimal conditions for oil/lipid production. Conventional processes require that both steps be optimized simultaneously which is necessarily sub optimal. The invention provides systems and processes for optimizing each type of production separately and independently, thereby improving overall production of oil, lipids and other useful products. This process is advantageous because it allows the optimization of the individual steps and growth phases in the production of oil from biomass. This allows the use of different feedstocks for various process steps.

A deep section regulating technique for regulating the water absorbing section of water injection well features that its section regulating agent is prepared from the additive and oil-contained sludge which has high compatibility to stratum. Its advantage is high plugging effect to high penetration stratum.

The invention provides a synergistic surfactant composition comprising: (a) from 5 to 95 wt % of a first surfactant which is selected from derivatives of alkyl polyglucosides and mixtures thereof; and (b) from 5 to 95 wt % of a second surfactant which is selected from: amphoteric surfactants, cationic surfactants, anionic surfactants, non-ionic surfactants, and mixtures thereof. This surfactant composition may be used to generate foam that is used for unloading a liquid from a hydrocarbon reservoir. It may be that the liquid unloading of foam generated using the surfactant composition is greater than that of foam generated from the first and second surfactants when they are foamed individually.

A system and method for processing algae cells to create biofuel are disclosed. Specifically, the system and method utilize steam to rupture algae cells in order to utilize intracellular oil therein. The system includes a conduit for growing algae cells and a generator for creating steam. Further, the system includes a lysing device that mixes the algae cells and the steam to rupture the algae cells. In order to maximize the efficiency of the lysing process, the system may further include a heat exchanger for preheating the algae cells with the lysed cells. In addition, the system includes a bioreactor to synthesize biofuel from the unbound oil.

A closed loop heat transfer system located on the surface near the wellhead for transporting hot fluid through a tubing located in the annulus between the well casing and the outer surface of the production string. The tubing extends down along the production string to a coil submerged in the oil reservoir in the vicinity of the production pump and back to the surface for reheating and recirculation. The tubing provides heat transfer from the hot fluid to the production fluid, as well as the downhole pump and the region of the oil reservoir surrounding the pump. The system is preferably operated to transfer enough heat to the oil to prevent paraffins from coagulating and forming deposits on the production string or sucker rods, if used. The higher temperature lowers the viscosity of the oil and increases oil production.

The invention relates to a method for restoring heavy metal polluted soil with an energy crop castor and belongs to the technical field of ecological restoring of a polluted environment. According to the method, the castor is planted in the heavy metal polluted soil, can grow normally and does not represent any toxicity phenomena; the heavy metal concentration of an above-ground part is higher than that of a root; and the castor represents extremely high transfer ability. According to the method, the plant is used for restoring the heavy metal polluted soil, heavy metal pollutants such as Cd, Ni, Cu, Mn, Zn and Pb in the soil can be removed via a plant extraction process, and the method has a certain economic value at the same time.

A method and a composition for stimulating oil production from wells which have ceased production by pumping in a mixture of gluconic, oxalic and citric acids, isopropanol, ethylene glycol and sodium citrate between pre-flush and over-flush intervals, which composition and method does not include the use of hydrochloric acid or hydrofluoric acid.

The invention discloses a method for controlling oil well bottom water coning by foam. In the method, a mass of foam is injected at the oil-water boundary of an oil well so that a foam plugging area is formed. In the technical technology of controlling oil well bottom water coning by foam in the invention, a mass of foam is injected at the oil-water boundary of the oil well so that a stable foam plugging band is formed. The injected foam has the characteristic of selective water plugging that the foam is broken when meeting oil and is stable when meeting water, so that the foam is comparatively stable at the oil-water boundary and is not easy to be broken and raising of bottom water can be efficiently plugged; and at an oil reservoir, the foam stability becomes weakened due to damage of the oil to the foam, and the foam is easy to be broken, but the output of crude oil in the oil layer is not influenced.

The invention provides a method for raising the recovery efficiency of super-deep low permeability heavy oil reservoir. The method comprises steps of pumping a pad fluid, pumping pressure higher than stratum fracture pressure to extrude a sand carrying fluid and sand into the stratum, and stopping a pump and closing a well after a displacement fluid is injected; opening the well, and continuingly injecting an oil soluble viscosity reducer after the well is closed for one to two days; injecting liquid carbon dioxide after the oil soluble viscosity reducer is injected, and soaking the well for the first time; continuously injecting a high temperature anti-expansion agent and steam after the well is soaked; and soaking the well for the second time, staring to produce after the well is soaked. By adopting the method for raising the recovery efficiency of the super-deep low permeability heavy oil reservoir, the fluid injection pressure and the viscosity of crude oil of the super-deep low permeability heavy oil reservoir can be greatly reduced, and high flow transfusion channels are formed in the stratum through fracturing the stratum, the flow capability of the heavy oil in the stratum can be raised, and the steam injection efficiency and the effect of thermal recovery and exploitation can be greatly raised.

A method of recovering petroleum from dormant oil wells or increasing the production of oil wells is disclosed. An alkali or alkali earth carbonate is introduced into a water layer associated with a subterranean petroleum reservoir and/or an explosive composition is introduced into an oil layer associated with a subterranean petroleum reservoir. CO₂ gas is produced by reacting the alkali or alkali earth carbonate with an acid and/or by detonating the explosive composition. An explosive composition can be introduced and detonated to achieve sufficient CO₂ gas production to increase pressure within the subterranean petroleum reservoir. Petroleum recovery can be further enhanced through the use of recycling.

The invention relates to a high-density ultra-strength petroleum compression fracture proppant and a preparation method thereof. The petroleum compression fracture proppant is prepared from waste alumina adsorbent taken as a main raw material and small amount of sintering aid and ceramic clay by milling, pelletizing and sintering. The petroleum compression fracture proppant prepared from the waste alumina adsorbent replacing industrial alumina has the characteristics of high density, ultra strength and acid resistance, has the volume concentration between 1.88 and 1.98, the apparent density between 3.20 and 3.50, the percentage of damage under 86MPa of closing pressure between 2.60 and 3.90 percent, the percentage of damage under 103MPa of closing pressure between 4.60 and 8.4 percent and the acid resistance between 3.40 and 5.20 percent, has excellent comprehensive performance, and can be used for petroleum compression fracture of deep oil wells.

The invention provides a profile modification agent for amphion jelly. The profile modification agent comprises the following components by weight percent: 0.1%-0.3% of amphion polymer, 0.1%-0.3% of compound cross-linking agent and the balance of water, wherein the molecule weight of the amphion polymer is above 1500 ten thousand. The compound cross-linking agent is prepared by a method comprising the following steps: firstly, adding phenol and formaldehyde in an enamel reaction kettle with a stirrer at a mass ratio of 1:1, heating and raising the temperature to 60 DEG C, then adding triethanolamine so that the phenol and formaldehyde are reacted to generate a mixture of monohydroxymethyl phenol, dihydroxymethyl phenol and trihydroxymethyl phenol for later use; next, adding sodium dichromate and thiourea in the reaction kettle with the stirrer at a weight ratio of 1:1, adding hydrochloric acid and a mixture of sodium acetate and sodium malonate which are at a weight ratio of 1:1 to react for 12 hours for later use; and mixing the products obtained from the former two steps at an isovolumetric ratio, and adding absolute ethyl alcohol for evenly stirring so as to obtain the compound cross-linking agent. According to the invention, the glue-forming property and glue-forming strength of the jelly profile modification agent in high-hypersalinity oil field water are improved, and the validity of the profile modification of the oil field is prolonged.

The invention provides a water injection well multi-slug profile control method. A multi-slug injection method is adopted, wherein a first slug adopts an organic jelly glue aqueous solution system including volume expansion grains; and a last slug comprises two stages, the first stage adopts an organic jelly glue aqueous solution system including volume expansion grains, and a profile control agent adopted by the second stage is a microsphere deep profile control modifying and flooding agent. In the water injection well multi-slug profile control method, a jelly glue type profile control agent selected and used by the first slug can form a powerful 'baffle' at the well bottom water injection front end, and the phenomena that a medicament is subsequently injected, and oily sludge directly dashes into an extraction oil well are avoided. In the last slug, the sizes of micro hole passageways are reduced through expansion performance of polymeric microspheres, depressurization and augmented injection are conducted through adsorbability of the polymeric microspheres, and well group oil production is increased through displacement performance of the polymeric microspheres. In the injection method adopting the three slugs, while consuming the oily sludge in a massive dose mode, the second slug enters large hole passageways and cracks to block a high-permeability layer band.

The invention discloses a compound acid blockage removing fluid. The blockage removing fluid is prepared from raw materials in parts by weight as follows: 4-6 parts of a foam flushing fluid, 20-30 parts of a prepad fluid, 70-100 parts of main acid and 10-20 parts of postpad fluid. The acid fluid has higher capacity of removing organic sediment pollution and high acid residue and emulsifying resistance. The acid fluid has low corrosion speed and good swelling inhibition and does not change the original water wetting characteristic of the stratum.

The invention discloses a throwing compression fracture machine that is suited to oil or gas throwing compression fracture effect increasing technology. It is made up of piezo ignition machine and high energy gas generator. The feature is that the piezo ignition machine could cut off the pressure bearing bolt by function of the liquid column, and make the plunger move to drive the firing pin to knock percussion cap. The percussion cap would fire the starting cartridge, powder and powder column. The fire output by the piezo ignition machine would fire the plural powder columns in high energy gas generator and compressing the object storing layers to fracture. The invention is easy to operate and sharply decreases the consumption of manpower and material.