50results about How to "Large control area" patented technology

The invention provides a composite fracturing method for liquefied petroleum gas (LPG)-carbon dioxide capacity increasing without water. The composite fracturing method comprises the following steps that LPG fracturing fluid is injected into a stratum, and injecting is stopped after a period of time; liquid carbon dioxide fracturing fluid is injected, and injecting is stopped after a period of time; the liquid carbon dioxide fracturing fluid carrying a propping agent is injected, and injecting is stopped after a period of time; and finally, the LPG fracturing fluid carrying the propping agentis injected, and injecting is stopped after a period of time. According to the composite fracturing method for LPG-carbon dioxide capacity increasing without the water, by injecting the different fracturing fluids at all injecting stages and reasonably utilizing the special properties of the different fracturing fluids, the effect of generating a fracture network is achieved, the oil-gas migrationcapacity of a fracture is improved, a vertical and horizontal 'netted fracture' system taking a main fracture as a main is formed, the well control area is increased, energy of the stratum is improved, the reservoir seepage characteristics are improved, the composite fracturing method is especially suitable for reservoirs with low permeability, compactness and high water sensitivity, the productivity after fracturing of a single well can be improved, and the problem that the low-permeability and compact reservoirs are poor in fracturing and reconstruction effect is solved.

The invention discloses a water-saving planting device based on humidity strain automatic seeding. The water-saving planting device is characterized by comprising a hanging base, wherein a hanging rodis arranged under the hanging base; at least one group of automatic seeding devices is fixedly arranged on the hanging rod; each automatic seeding device comprises two horizontal support plates in vertical and symmetrical arrangement; an arc-shaped double-layer humidity expansion body is positioned at the tail ends of the two horizontal support plates and is connected with the tail ends of the two horizontal support plates through hinging; crop seeds to be sowed are put into a cylindrical casing; the outside of the cylindrical casing is connected with the inner layer of the arc-shaped double-layer humidity expansion body; under the humidity strain driving, the arc-shaped double-layer humidity expansion body overcomes the bending rigidity of the horizontal support plates, and then generates the jumping flection around the tail ends of the horizontal support plates; the inward concave state is fast converted into the outward convex shape; the cylindrical casing is popped up; in the flying process, the crop seeds at inside are spread out. The water-saving planting device has the advantages of automatic induction, high sensitivity, simple structure, high spreading speed, large seedingarea, small occupied space, no maintenance, manufacturing convenience, lightweight and reliability.

The invention provides an unconventional reservoir horizontal well crack reservoir controlling volume fracturing well completion method, and belongs to the field of oil and gas exploitation. The method adheres to the concept of geologic reservoir, fracturing transformation and mining mode integration, by shortening the cluster spacing, increasing the cracking density and improving the sand addingstrength, stratum switching without stopping of a pump is achieved through long-acting temporary plugging, 100% of perforation clusters are opened through pressing, bridge plugs are reduced or even avoided, crack reservoir controlling is enhanced, energy supplementing is achieved, and imbibition displacement is synchronized. By means of a crack control matrix unit, all reserves can be mined, the driving pressure difference required by oil gas in a matrix is greatly reduced, and available reserves are greatly increased.

The invention discloses a low-pressure tight oil reservoir replenishment energy fracturing method, which comprises the following steps: deploying several long horizontal wells in the low-pressure tight oil reservoir, the shafts of the long horizontal wells are all parallel to each other, and the shafts of the long horizontal wells are all perpendicular to the formation The direction of the maximum principal stress; precise fracturing of each long horizontal well through dense cutting; through the full three-dimensional fracturing software simulation, the fracturing fractures can completely cover all long horizontal wells and each long horizontal well section. The amount of liquid injected into the ground; calculate the amount of additional liquid injected into the ground when the formation pressure within the range of the long horizontal well reaches the preset multiple of the original formation pressure; all long horizontal wells are fractured according to the amount of liquid injected into the ground and the amount of added ground fluid. The invention can slow down the production decline of the low-pressure tight oil reservoir, prolong the stable production period, improve the recovery degree, and increase the cumulative production of a single well in the whole life cycle of a single well.