Results of statistical modeling of parameters of operation of horizontal wells

In present day the residual taken stocksof the LLC Gazpromneft-Noyabrskneftegaz company make more than 300 million t. of oil from them in the category ABC 1 about 80%, in subgroups - "drilled reserves" and "not drilled reserves" 60% and 40% respectively. At structurization of subgroup the "drilled reserves" allocated stocks under the operating and idling well stock correspond as 50/50, thus in subgroup idle total stocks under emergency fund and flooded about 70% that makes a little more than 50 million t. the residual taken stocks. It should be noted that maintenance of oil production levels on fields with high value of development of the initial taken stocks and high water content is generally provided by specific work with well stock. In this regard the systematized base of technical and technological parameters of the horizontal wells (HW) for determination of the following parameters is developed:
• dependences of an output of HWon length for certain geological and physical conditions:
• dependences of an output of HW on geological and physical parameters, such as permeability, layer thickness,hydraulic conductivity of layer;
• convergence of the actual indicatorsof work of HW with analytical models.
Materials and methods
One of the main criteria of efficiency of the used technologies is monitoring of dynamics of technological indicatorsof development with use of such tools as, hydrodynamic modeling, graphic-analytical methods, the regression and correlation analysis, analytical modeling.
Results
On the basis of systematization of indicators of work of horizontal wells in various geological and physical conditions opportunity and reliability of use for forecasting of indicators of development the Lower Cretaceousdeposits of the Surgut's and Vartovsk's arches of "the universal parameter of falling of an output of oil" together with the revealed empirical coefficient of exponential dependence is proved.
Сonclusions
As a result of performance of work are created the offers on increase of reliability of the received results including:
1) use of analytical models demands adaptation on the actual indicators of wells;
2) it is necessary for the loudspeaker of technological indicators in addition (besides geological and hydrodynamic models) to count with applicationof the analytical models adapted on development history;
3) to carry out forecasting of an output of HW and design dynamics taking into account results of the actual indicators. On the basis of systematization of indicators of work of wells with the horizontal termination in various geological and physical conditions opportunity and reliability of use for forecasting of indicators of development the lower mel of deposits of the Surgut's and Vartovsk's arches of "the universal parameter of falling of an output of oil" together with the revealed empirical coefficient of exponential dependence is proved.