低渗透气藏关井测压资料综合应用分析研究

靖边气田属于大面积、低丰度、低渗透气田，这种特殊的地质情况为气田的开发带来了一定的困难。XX井区是靖边气田的主力生产区块，其生产情况的变化在一定程度上将决定靖边气田的生产状况。经过近几年的持续开发，目前该井区气井平均井口油压已降至11 MPa，且每年仍以1.8 MPa左右的速度在下降，因此稳产形势十分严峻。针对这一状况，2005年4～6月，XX井区在采出程度达到17％的情况下进行了整体关井测压，取得了大量的关井测压动态数据，通过对关井测压资料的综合分析研究，落实了区块压力变化情况，复算了单井目前产能，明确了压力系统划分，核实了区块的动态储量，从而进一步加深了该区块的开发地质认识。

Integral Analysis and Study on Shut-in Pressure Data of Low-permeability Gas Reservoirs

Jingbian Gasfield is a large gas field of low permeability and low abundance, encountering difficulty in its development due to special geological features. XX production zone is the key production block in Jingbian Gasfield, which dominates the production of the whole gas field to certain extent. Following continuous production in recent years, average wellhead tubing pressure of the production zone has dropped to 11Mpa and is still declining at the rate of about 1.8 MPa/year, which threatens sustainable constant-rate production. To tackle the problem, the whole XX production zone was shut-in for pressure survey during April to June in 2005 when recovery rate reached 17% and substantial shut-in pressure behavior data has been able to be obtained. Comprehensive analysis and study of the data has ascertained pressure variation status of the block, verified current productivity of a single well, determined pressure system classification, confirmed dynamic reserve of the block, which deepened our knowledge of the geology of the block.