The Water Invasion Dynamic Research On Gas Reservior Of Multi-layer Loose Sand And Edge Water

As a kind of relatively little energy for environment pollution, Natural gas has got moreand more favor of the world. From the point of environmental protection and optimization ofenergy structure, the21st century is the century of natural gas. According to the achievementsof natural gas exploration in recent years, our country’s natural gas resources are rich. Thenatural gas resource is47×1012m3. Using the analysis of basin and zone reserves growth rulesand the expert estimation, we predict the gas recoverable resources is (10-14)×1012m3. Withwider range of loose sandstone reservoir distribution in our country, the reserves are big andthe output occupies an important position. In the next10years, multilayer late unconsolidatedsandstone gas reservoirs flood problem has become a technical problem to be solved.Dynamics of multi-edge water unconsolidated sandstone gas reservoirs of water has importantguiding significance for its invasion.In view of the importance and urgency of related technology research, this paper takesSebei No.2gas field as the research object. Combined with unique characteristics of edgewater gas reservoir of quaternary unconsolidated sandstone multilayer, we analyze thedischarge characteristics of gas wells, identify sources and judge effusion. On the basis of thegas reservoir understanding, we analysis and evaluate gas reservoir water invasioncharacteristics and energy. Combined with water flooding and non-steady-state mass balancemethod typical curve fitting, we analyze gas reserves utilized to the situation. On the basis ofresearch of the water intrusion characteristics, we analyzed the water body of energy andpressure distribution. By carrying out gas reservoir dynamics and accurately evaluating thestatus of water intrusion, it has an important theoretical and practical significance to develop areasonable scale of production of the gas reservoir and make the next step to developcountermeasures adjustment. Meanwhile, it has universal significance to the same gasreservoir exploitation.