气田压力系统的划分方法

Pressure system division in gas fields

为了探求合理的气田压力系统划分方法、促进现场技术人员准确而快速地划分气田压力系统,根据气田实际情况,探讨气田压力系统划分原则、思路和步骤.结果表明:划分气田压力系统时,低渗气田宜遵循"就近、同层、同时、同流体、宜粗不宜细"原则,而中高渗气田宜遵循"就近、同层、同时、同流体、同压降"原则;划分时应按照投产顺序,由单井、井组、区块和气田的顺序依次展开.低渗气田的地质特点决定了其压力系统划分的复杂性,需参考多方面资料且随开发资料丰富后逐步调整和完善.

In order to find out better method of pressure system division and help technicians to divide pressure systems in gas field,the principles for pressure system division were established on the basis of performance data in gas fields.It was shown that the principles of pressure system division could be simply stated as 'local region,similar subzone,similar period,similar fluid,preferential sketchy rather than fine' in low-permeability gas fields,and 'local region,similar subzone,similar period,similar fluid,similar pressure drop rate' in medium-high permeability gas fields.It should be worked according to commission time of gas wells at first,and then started from single wells to well groups,then to blocks,and last to gas fields in sequence to analyze the pressure systems in gas fields.The characteristic determines the complexity of its pressure system in low-permeability gas fields,and it should be made full use of different data at one period and adjusted after the data is gradual plenty when the presser system is divided.