川东龙门气田石炭系气藏试采动态监测及效果

PRODUCTION TEST PERFORMANCE MONITORING OF THE CARBONIFEROUS GAS RESERVOIR IN LONGMEN FIELD IN EAST SICHUAN

龙门气田石炭系气藏是一个储量较大的中型整装气藏 ,平面展布长 2 4km ,宽仅 1 .0～ 2 .5km ,含气面积 45.1km2 ,产层埋深 460 0～ 480 0m ,带有边水 ,气水界面 - 44 2 0m ,含气高度仅 460m ,储层非均质性较强 ,气藏地质和工程条件复杂。为尽快搞清其动态特征 ,为开发设计提供详实资料 ,试采中 ,根据气藏地质和工程特点 ,采用最先进的高精度电子压力计 ,在开井、关井条件下通过井口、井底单点或连续测试等方法 ,录取了大量可靠的监测资料 ,在不到一年的较短时间内 ,搞清了气藏井间动态关系以及产能、流体性质等 ,取得了很好的效果 ,这些监测方法对加快类似气田的试采工作有一定借鉴作用。

The Carboniferous gas reservoir in Longmen field is a medium-sized integral gs reservoir with a length of 24 km,widths of 1.0～2.5 km,a gas-bearing area of 45.1 km 2 and payzone depths of 4 600～4 800 m.This gas reservoir is of edge water,its gas-water contact being at -4 420 m with a gas column height of 460 m only.The heterageneity of the reservoir bed is serious and the gas reservoir geology and engineering conditions are complicated.In order to detect the performance characters of the reservoir as quickly as possible and to provid a set of detailed data for its development design,a great deal of reliable monitoring data were achieved in production test through adopting the most advanced high-accuracy electronic gauge and these methods of single-point or continuous testing at wellhead and bottomhole under open hole and shut-in well conditions in consideration of the gas reservoir geology and engineering properties.In a short time of less than a year,the interwell performance relation,productivity and fluid properties of the reservoir were detected,a fair development effectiveness being achieved.These monitoring methods are of a certain referential significance for quickening the production test work in the same gas fields.