| SuLiGe Gas field is a large-scale lithologic gas field of typically low pressure,low permeability and low abundance. Because being alluvial due to fluvialdepositional system, its reservoir continuity is poor, but heterogeneity strong. A seriesof problems are exposed by vertical wells, such as low controlled reserve of singlewell and gas production, fast decreasing of pressure together with low stableproduction capacity. Thus Horizontal wells have obvious advantages in lowpermeability gas fields.This text, based on the Reservoir understanding, dynamic monitoring andseepage mechanism of produced testrial in Changqing Oilfield Company GasProduction Plant III, evaluates horizontal well production test results. Meanwhile analysismainly on the information of the carried-out produced Trial, it forms classificationcriteria combined with static and dynamic and establish gas well productivityevaluation model and methods. On this basis, we further deepen the descriptionmethod of single well dynamic horizontal wells,analysis and forecast horizontal wellsproduction dynamic rules.By studying this text, considering the gas field reservoir heterogeneity and linearflow characteristics comprehensively, it establishes production capacity evaluationmodel of low permeability gas reservoir horizontal well and solves the capacity issueswhich couldn’t be evaluate correctly by the conventional formula. It enriches thecurrent reservoir engineering theory, and deeply analysis the main controlling factorof capacity, also leading a guiding significance to the arrangement design andproduction capacity of this kind horizontal wells in gas reservoirs. By establishinganalytical methods of production dynamic rules, it ensures the main controllingfactors effecting stable production of horizontal wells development technology.Besides, on the basis of capacity evaluation and production dynamic rules, we wouldestablish the strategy and measurement towards the stable production of the horizontal wells. |
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