磨溪气田嘉二段气藏产能特征

川中磨溪气田嘉二段气藏的勘探开发经历了近３０年，取得了较好的成果，是中国石油西南油气田公司在川中地区发现的最大的嘉陵江组整装气藏。但气藏地质情况十分复杂，给气藏的开发带来了较大的困难。为此，充分利用气藏的静、动态资料，对气藏气井的产能特点及高产井控制因素进行了深入的分析。研究表明：该气藏气井产能低、生产压差大、测试产能差异大、非均质性强、气水关系极为复杂；相对高产气井平面上主要分布在构造的南翼，纵向上嘉二²B层是主力产层，但在嘉二¹亚段也存在获得高产气井的可能性；气井产能主要受到沉积相、沉积微地貌、裂缝的发育程度、储层中天然气的饱和度、储层保护和改造措施等因素的控制。

PRODUCTION PERFORMANCE OF T1j2 GAS RESERVOIR IN MOXI GAS FIELD

The T1j2 gas reservoir in Moxi gas field, explored and developed by PetroChina Southwest Oil and Gasfield Company for nearly 30 years, is the largest integrity gas reservoir discovered in Jialing jiang formation of the middle Sichuan Basin. Due to the complex geological properties which caused great difficulty to its development, this paper conducted careful analysis on the performance characteristics of high rate gas wells and dominant factors based on static and dynamic data. It was recognized that, gas wells in this reservoir have low productivity, high production pressure drawdown, great anisotropy and heterogeneity, and composite gas water contact; wells with relatively high production rates mainly locate on the south structural wing; vertically, the T1j22B is the main contributing layer, while T1j21 also has the potential to support high rate wells; and gas well productivity is controlled to a great degree by sedimentary facies, micro sedimentary geologic features, fracture development, natural gas saturation of the reservoir and measures of formation protection and stimulation, etc.