Development of semiconsolidated collectors always becomes complicated by both sand production and contamination, and decision arise at that problem become paramount task for hydrocarbons production. These complications are typical for Gatchina underground gas stor-age. The produce reservoir represents unconsolidated sandstone, that’s why the facility works in the conditions of overabrasion. Sand production is rather considerable.
Fight with scale in the well operation is one of the most important ways to increase the efficiency of oil production. Scale formation in the bottom hole reservoir and downhole equipment reduce their productivity, leading to the current unplanned and costly workovers. The piper describes the characteristics of the process of scaling in wells in the later stages of the development of oil fields.
There is full rationale of the phenomenological model of complicated riphean fractured carbonate reservoirs of Yurubcheno-Tokhomskaya oil-gas bearing area, created for simulation of development process for unique oil and gas deposits. The block discrete organization of these complex structure reservoirs are allow them non-additive and non-linear properties under development. Their marked similarity of their structure in a wide range of sizes, as well as the phenomenon of self-organization characteristic of complex nonequilibrium systems. Based on these production rates and their total cumulative production within such hydrocarbon obey a power law distribution, which is characteristic of the behavior of many nonlinear systems and can be described by Pareto. To implement the suggested model has been written special computer program compatible with the hydrodynamic simulation «Tempest MORE» of «Roxar».
Results of experimental determination of Yaregskoe field degassed oil rheological features are given in the article. Modern methods of visco-elastic and thixotropic properties research are described and results of these methods application while abnormal oil research are shown. As a result an improved data of Yaregskoe field oil is obtained and there is a recommendation to extend a number of enhanced oil recovery methods, including physicochemical and wave methods application.
By experiments, conducted on the installation like Bridgeman’s anvil it was determined that under conditions of high pressure, displacement deformations and elastic wave’s effect of short duration, sulphates are reclaimed by hydrocarbons. As a result of this reaction sulphur and hydrogen sulphide are produced.
It is determined that main reasons of permeability reservoirs decrease in Nizhnechutinskoe oil field are capillary pressures and elastic stresses, appearing at depression making. It is displayed that to reduce tangential stresses in oil bearing reservoirs it is expedient to make vertical slits in oilwells’ open holes.
The peculiarities of elastic stresses in open hole wells’ of Gatchina gas storage reservoir are researched. It is revealed that in depression more than 1,5 MPa gas bearing rocks start to destroy. On the basis of studying of correlation relation between technological parameters of gas wells’ production and evacuation of sand the equations of plural regression are constructed. These equations are used to make prediction of sand evacuation at each producing gas well.
