4 results about "Fracturing fluid" patented technology

The invention provides a hot-dry rock fracturing high-pressure extraction laboratory simulation device. The device comprises a fracturing fluid injection system, a proppant injection system, a high-pressure gas boosting injection system, a fracturing body, an annular pressure applying system and a high-pressure pipe valve. The proppant injection system comprises indirect proppant injection and curing. The high-pressure gas boosting injection system comprises gas boosting and indirect gas injection. The fracturing body comprises a sample fracturing chamber and a sample annular-pressure chamber. The fracturing chamber comprises a three-dimensional fixing support and a three-dimensional hydraulic system. The three-dimensional hydraulic system comprises a hydraulic sliding cavity and a hydraulic moving plug. The sample annular-pressure chamber comprises an annular-pressure chamber steel plate and an inner gum sleeve, a cavity is formed between the gum sleeve and the steel plate, and fluid is injected to realize pressure coating effect. Fracturing fluid injection and annular pressure application are both realized by connection of a high-pressure pipeline with a high-pressure control component. A split module combination structure is adopted, original samples of fracturing samples are ensured to be unchanged, proppant injection is performed accurately, high-pressure gas is injected for displacement and reproduction, and recovery ratio is increased. The device has the advantages of novel structure and safety and durability.

The invention provides a fracturing fluid for fracturing of shale. The fracturing fluid comprises the following raw materials, by weight, 0.15 to 0.25 part of a thickening agent, 0.15 to 0.25 part of a cross-linking agent, 0.5 to 1.0 part of a pH value regulating agent and 0.05 to 0.1 part of a gel breaker. The invention also provides a preparation method for the fracturing fluid. Compared with conventional jelly fracturing fluids, the fracturing fluid provided by the invention has the following advantages: the usage concentration of the thickening agent; the pH value regulating agent and the cross-linking agent are premixed during preparation of the fracturing fluid; and through addition of the non-conventional pH value regulating agent into the base fluid of the fracturing fluid, the characteristic of delayed crosslinking of the fracturing fluid is greatly improved.

The invention discloses an intelligent sliding sleeve for multi-stage fracturing of a horizontal well and relates to, but not limited to, the technical field of fracturing sliding sleeves. The intelligent sliding sleeve comprises a detection unit, a control unit and an execution unit, wherein the detection unit is provided with an antenna module, the antenna module is used for detecting a load-carrying label for recognizing fracturing fluid and transmitting an obtained signal to the control unit; the control unit is provided with an electric control module, and the electric control module is used for generating a corresponding control signal according to the received signal and transmitting the control signal to the execution unit; the execution unit is provided with a motor module, a transmission module and a sliding sleeve module, and the motor module, the transmission module and the sliding sleeve module are connected in sequence; the transmission module is used for converting the rotational movement of the motor module into linear movement and driving the sliding sleeve module to act simultaneously; and the sliding sleeve module is used for achieving opening and closing of the sliding sleeve through linear movement. By the adoption of the intelligent sliding sleeve for multi-stage fracturing of the horizontal well, full-bore production of a pipe column can be achieved, free adjustment of the opening degree and closing degree of the sliding sleeve can be achieved, and the labor intensity of workers is effectively relieved.

The invention discloses an offshore oilfield micro-fracturing injection time calculation system and method, and the method comprises the steps: modeling: collecting modeling parameters, and building aseepage and rock mechanics mathematic model; a simulation injection step: simulating injection of the micro-fracturing fluid, setting N1 injection time periods, and generating N1 post-fracturing fracture networks; an example execution step: executing the prediction example to obtain the discount yield increase of the well group; and a selection step: judging whether well group discount yield increase is in a descending trend or not, and selecting an injection time period corresponding to the after-pressure fracture network in the descending trend at first as injection time. By simulating theinjection time periods with different lengths and monitoring the well group discount yield increase of a plurality of post-fracturing fracture nets in real time, the injection time period corresponding to the post-fracturing fracture net with the well group discount yield increase reaching the first descending trend is finally selected as the optimal injection time. The optimal injection time is obtained, so that the optimal fracture network form is obtained, and the injection capacity of a single well is improved as high as possible under the condition that later water channeling is not caused.