35 results about "Filtration coefficient" patented technology

A method for on-site discrimination of T-shaped fracture formation risks and a corresponding fracturing process belong to the technical field of hydraulic fracturing in oil and gas fields. A method for on-site discrimination of T-shaped fracture formation risks, comprising the following steps: (1) the first perforation adopts a single-stage perforation method, and the perforation length is 1-3m; (2) small-scale fracturing tests and pressure drop analysis are carried out, The pressure drop test time is more than 1.5-2.0 times of the small-scale fracturing construction time; (3) Calculate the pump stop pressure gradient and fracturing fluid loss coefficient; (4) If the pump stop pressure gradient is greater than 0.023MPa / m, and the fracturing If the fluid loss coefficient is 1-2 orders of magnitude higher than the matrix fluid loss coefficient, the risk of T-shaped seam formation is high. For mines with a high risk of T-shaped fractures, it is important to improve the productivity of shale gas wells by optimizing perforation methods and fracturing parameters to improve fracture creation efficiency, form vertical fractures as much as possible, and avoid forming a large number of horizontal fractures and T-shaped fractures. significance.

The embodiment of the present invention provides a method and equipment for evaluating the fluid production contribution rate of a single-stage fracture based on pressure drop data. The method includes: determining the reservoir closure pressure of the target well; The expression of reservoir fluid loss coefficient is determined by formula; the maximum fracture height is determined by solving the fracture height equation; the maximum fracture width is determined according to the maximum fracture height and reservoir closure pressure, and the average fracture width is determined according to the maximum fracture width; Reservoir fluid loss coefficient expression, maximum fracture height and maximum fracture width, determine the fracture length, and determine the half-fracture length; according to the measured fracture porosity, formation thickness, fracture liquid phase pressure, liquid phase viscosity, liquid phase volume coefficient, Bottomhole pressure, as well as the average fracture width and half-fracture length, determine the fluid production of the target fracture; determine the contribution rate of the target fracture according to the fluid production of the target fracture and the total fluid production at the bottom of the hole, and can accurately evaluate a single section The fluid production contribution rate of fractures is low, and the cost is low.

The invention discloses a calculation method for dynamic comprehensive filtration coefficient of fracturing acidizing in fractured reservoir. The calculation method for dynamic comprehensive filtration coefficient of fracturing acidizing in fractured reservoir comprises the following steps that: (1) calculating a matrix filtration coefficient Cmt of the considering acid wormhole; (2) calculating the natural fracture filtration coefficient (Cft0) (i) i ( / i) in initial state and the comprehensive filtration coefficient Ct0 of the fracturing acidizing in initial state; (3) calculating the effective operating distance (Lefn) (i) i ( / i) of the acid liquor in the i natural fracture of a Tn time step; (4) calculating the i natural fracture width (wn) (i) i ( / i) of the Tn time step; (5) calculating the filtration coefficient (Cftn) (i) i ( / i) of the i natural fracture of the Tn time step; (6) calculating the comprehensive filtration coefficient Ctn of the fracturing acidizing of the Tn time step. The calculation method for dynamic comprehensive filtration coefficient of fracturing acidizing in fractured reservoir considers the natural fracture width variation caused by the acidliquor corrosion on the wall surface of the natural fracture, the principle is reliable, the calculation is simple, the natural fracture with random and complicated distribution can be processed, thefiltration speed of the acid liquor in the fracturing acidizing process can be accurately and quickly calculated, thereby providing an effective guidance for the design of the fracturing acidizing scheme.

The invention belongs to the technical field of unconventional oil and gas stimulation, and in particular relates to a method for measuring the fluid loss coefficient of supercritical carbon dioxide fracturing fluid, which is used for determining the fluid loss coefficient of supercritical carbon dioxide fracturing fluid. The method for measuring the fluid loss coefficient of supercritical carbon dioxide fracturing fluid, the steps are as follows: (1), place the rock core, (2), discharge the gas in the upper cavity of the intermediate container, and fill the upper cavity of the intermediate container with methane, (3), Apply pressure to the lower cavity of the intermediate vessel, (4), inject methane into the rock core, (5), empty the methane in the upper cavity of the intermediate vessel and inject carbon dioxide, (6), apply confining pressure, (7), apply back pressure, ( 8), injecting carbon dioxide into the rock core, (9), calculating the filtration rate and filtration coefficient. The temperature and pressure of the method of the invention can be adjusted to meet the high-temperature and high-pressure environment requirements in which the carbon dioxide reaches a supercritical state, and can truly study the filtration law of the supercritical carbon dioxide fracturing fluid under different temperature and pressure conditions.

The invention discloses a socialized filtering method on the basis of a preference model and mainly solves the problems of a great amount of targeted users, a complex social relationship and low accuracy of a filtering method in the prior art. The invention adopts the implementation scheme that the socialized filtering method on the basis of the preference model comprises the following steps of: calculating an influence factor of group members on a group by analyzing a socialization relationship among the group members; calculating an influence factor of preference objects of the group members to the group by analyzing the distribution of the preference objects of the group members in the group; integrating the two influence factors and carrying out character representation on the preference model of the group together to obtain a weighted influence vector of the group; and then calculating a filtration coefficient and judging the recommended condition to filter the common and like preference of the group, so that the accuracy and the efficiency of the socialized filtering method are improved. The socialized filtering method has the advantage of analysis on the preference model ofthe group. The recommendation of objects in different fields can be realized on the Internet only by modifying and acquiring keyword vectors in the fields.

An embodiment of the invention is applicable to the communication field and provides a data processing method, a data processing device and a terminal. The data processing method comprises the following steps of obtaining page data which is corresponding to an application program; obtaining a color filtration coefficient of the application program, wherein the color filtration coefficient comprises a blue component filtration coefficient; filtering the obtained page data according to the color filtration coefficient of the application program; outputting the page data after filtration. The data processing method can reduce damage to human eyes from the blue components of the web data.