Qi40Steam Flooding Swept Volume Calculation Method Research

Qi40block steam flooding development to the present,plane and vertical producingdegree of uncertainty, the steam cavity affects the morphology and size of theuncertainty, control measures for steam chamberconditions can not be implemented, need to sweepvolumeof vapor chamber was calculated accurately. Analysis of the main factors affecting the volume of steam, steamflooding swept volume calculation method is determined, soas to improve the steam swept volume, improve the development result of steam flooding.The steam sweep volume calculation method can be divided into empirical analytical formula, numericalsimulation method and seismic method three, among them experience formula can be divided into static analytical solution and the dynamic analytical solution, because the static analytical model is usually the field experimentalflooding rock steam reservoir with similar ore and crude oil properties and characteristics of the historical production data and based on the dynamic, but for a specific reservoir,because it did not include specific flow and injection production parameters, so the static analytic model cannot accurately predict the steam sweep volume.Numerical simulation method can be more comprehensivesimulation, calculation and react in different reservoir characteristics, different injection production parameters,different steam injection process under the conditions of the steam swept volume. Dynamic analysis model forscreening and evaluating reservoir development programof economic applicable, at the same time, it includesdynamic data of the reservoir, so the calculation resultsthan the static model is reliable, but for an already developed reservoir, steam swept volume calculationresults are still not reliable numerical simulation method.In this paper, the streamline simulation, R.Baer, C.Fong model, implicit calculation model and numerical simulationmethod to calculate the steam in Qi40block of the sweptvolume, of the results with the field error. Simulationanalysis of regional structure, sedimentary facies and sedimentary microfacies, sedimentary rhythm, rock and fluid properties, reservoir, well spacing, turn the operating parameters of reservoir conditions before and during steam flooding and other factors impact on the steam sweep volume using numerical; and based on the study of threetypical wells group characteristics and regularity of steam.