Study On Development Design Of LS36-1 Gas Reservoir

The LS36-1 gas reservoir belongs to the low condensate oil condensate gas reservoir,and the permeability is low,it has certain edge water,and the gas reservoir is complicated.How to develop the gas reservoir is the main problem.Firstly based on the geology and production situation of comprehensive analysis,the research on fine reservoir evaluation LS36-1 gas field,the reservoir heterogeneity is understanding,on the basis of stratigraphic correlation and classification principles,classified reservoir group,sandstone,the sedimentary rhythm segmentation layer;Using the results of 3d seismic fine structure interpretation,the study of the characteristics of fracture characteristics and structure;With petrology,sedimentology,the basis of core data,determine the pattern of sedimentary facies,sedimentary microfacies in the study of the evolution of longitudinal and plane distribution rule;In the study of reservoir characteristics,including lithology,physical property and heterogeneity,microscopic pore structure,etc.;The interlayer insulation occurrence,plane distribution rule;To further make clear the rule of oil and gas distribution and controlling factors,3d geological model is set up,and on this basis to carry out numerical simulation research to determine the technical boundaries of development parameters.On the basis of the actual geological and dynamic data,using conventional reservoir geological and dynamic analysis method,combined with the reservoir geological modeling and numerical simulation,and put forward the development plan according to the results of the research design,including the development of the design principles,well location optimization design,horizontal well length optimization,the optimal development plan design and production performance prediction,and for testing and put forward the corresponding requirements.To development plan design,the study on the reservoir geological characteristics,development rules and the internal relation between them,so as to achieve the purpose of effectively guide the oilfield production.The main research results are as follows:LS36-1 is a typical anticline structure,a total of 8 gas reservoirs,M1~1,M2,M3~1,L2,L3 are water vapor reservoirs,M1~2,M3~2 and L1 are bottom water reservoirs.The geological reserves of natural gas are 43.08×10~8m~3,of which the pure hydrocarbon geological reserves are 25.61×10~8m~3,the carbon dioxide is 13.09×10~8m~3 and the geological reserves of condensate is 43.91×10~4m~3.In view of the imperfect M1~2 well pattern and the low productivity of the A3 well,it is suggested that the M1~2 layer should be developed as a horizontal well,ie,the A4H well,on the basis of numerical simulation.Through the simulation results to determine the optimal horizontal length of800m,is expected to use geological reserves of 7.3×10~8m~3,design single well production capacity of 30~40×10~4m~3/d.