Real-time Monitoring Of Hydraulic Fracturing And Explain The Technology Research And Application

The effect of hydraulic fracturing is determined by the perfects of fracturing arts and crafts, while the real time fracturing monitor and explanation technology make sure the fracturing crafts succeed, it is also the lately development and tendency of hydraulic fracturing. Using this technology, we can realize the fracture and stratum, analyze and evaluate the fracturing performance and construction quality, reduce fracturing treatment risk, make sure the treatment completed in scheme, adjust the project in oil field work, and advance the fracturing quality and treatment effect.This paper aims at the important and unsolved question in real time fracturing monitor and explanation technology. Using hydrodynamics, linear elasticity fracture technology, heat transmission technology, optimization technology, numeric mathematic, software engineering and so on, we research it systemically and make the following conclusion:(1) Systemically investigated real-time hydraulic fracturing monitor and explanation technology. Set up new real-time hydraulic fracturing monitor and analysis model, put forward the feasible pressure history transfer method, study the treatment's collection and communication technology, manufacture handy hydraulic fracturing and acidizing monitor apparatus and in real time hydraulic fracturing monitor and explanation software.(2) Creatively developed the real-time 3-D extended fracture model. The model mainly includes the equilibrium equation of fluid volume, fracture length, fracture width, and fracture height etc. Using root extracting approach to work out the numericsl solution, it can greatly enhance the velocity of calculation and the stability, reliability of the results, and can entirely meet three conditions of the real-time simulation and analysis. Moreover, it is so simple that it is apt to understand and apply.(3) Utilized and consummated the distribution and migration model of proppant in the 3-D extended fracture. The model, which utilizes the accurate numerical calculation approach, mainly includes -law of the proppant, the influence of wall drawing effects by the sidea of fracture, the proppant interfering setting and the proppant migration and distribution in 3-D fracture.(4) Developed wellbore transient flow model and friction calculating method for the sand mixed fluids effected by propant. The transient flow model, which takes the effect of the propant into consideration, chiefly contains continuous equations, the fall down equation of the fluids and the state equation.(5) Mentioned the pressure historic deduction method for real-time monitoring and analysis during fracturing treatment, integrated the optimization method of stepwise linear least-squared method and constraint scale change method with the database of formation &fluild characteristics parameters, it fits the uphole pressure directly and explains some critical formation characteristics parameters such as rock cracking pressure, the distribution of the formation stress, formation pressure, etc. Also, it interprets the rheological properties, leakage levels, dynamic change, 3-D hydraulic fracture extended, distribution and migration of proppant in real time.(6) Researches on the database of formation & fluild characteristics parameters. This database, which comprehensively utilizes the exsiting academic and laboratory study achievements of the world, systemically makes in-depth studies on formation & fluild characteristics parameters and attains some new achievements.(7) Researches on fracturing datum collecting and communication techniques. We develop a portable acid-frac monitor. This monitor, which can simultaneously check the pressure signals, displacement (including main and crosslinking displacement) signals, sand volumn signals of both sides, completes the fracturing datum collecting, communication, monitoring, preservation playing back etc. Using wave filter to pre-treat the datum, the monitor with high precision can effectively eliminate the effects of a variety of random factors and collect the datum quickly. It c...