Numerical Simulation Study On Development Scheme Of Low Permeability M Gas Reservoir

The reservoir studied in this paper belongs to low porosity and low permeability gas reservoir. It has serious inner-layer heterogeneous and medium heterogeneous between different layers, this is a big difference from the conventional gas reservoir. Therefore, how to develop this kind of gas reservoir is an urgent problem to be solved.Using Eclipse software, this paper finished the development plan design of low permeability M gas reservoir under the combination of geological model and gas engineering.According to characteristics of M gas reservoir, the application of numerical simulation theory and research related to the technology through the demonstration of well pattern and well-type feasibility studies, development of technology policy and a mixed well pattern deployment is studied, with the main content:①The single well model establishing and history matching were finished;②According to the parameters in combination with second single well logging interpretation results, the reasonable well spacing was demonstrated;③Using Eclipse phase analysis software, the reservoir fluid phase fitting was accomplished and the PVT of gas reservoir was determined;④Through the statistical analysis of non-steady state gas waterthree samples of infiltration experiments, analysis of seepage characteristics of reservoir water was achieved;⑤According to the3D geological modeling, through appropriate adjustment, the numerical simulation mode was established;⑥Based on the model, completed the development of technology policy demonstration;⑦According to the above demonstration, a triangle-wells model was chosen for the optimism program which was utilized to predict the reservoir production Through the research of this paper, the main conclusions were draw as:multi-layers production with vertical well is superior to single layer, horizontal well is suitable for single layer production zone, vertical well was advice for multi-layers production zone. When the minimum bottom hole flowing pressure is4.5MPa, the recommended reasonable developing well spacing is between1000m-1200m, the initial velocity of gas recovery is about2.1%/a, horizontal section length is1200m.The development plan of M gas reservoir demonstrated in this paper is helpful to the efficient and reasonable development, and at the same time it has certain reference value for the development plan design of the similar gas reservoir.