南川区块平桥地区页岩气井生产阶段划分与合理生产方式研究  

Research on production stage division and reasonable production mode of shale gas well in Pingqiao area of Nanchuan Block

作　　者：房大志[1] 马伟竣[1] 谷红陶 卢比 胡春锋 FANG Dazhi;MA Weijun;GU Hongtao;LU Bi;HU Chunfeng(Sinopec Chongqing Shale Gas Co.,Ltd,Chongqing 408400,China)

机构地区：[1]中国石化重庆页岩气有限公司,重庆408400

出　　处：《油气藏评价与开发》2022年第3期477-486,共10页Petroleum Reservoir Evaluation and Development

基　　金：国家科技重大专项“彭水地区常压页岩气开发技术政策及气藏工程方案”(2016ZX05061-016);中国石化十条龙重大科技项目“南川复杂构造带页岩气勘探开发关键技术”(P19017-3)。

摘　　要：在不同的生产阶段采取对应的生产方式是实现页岩气高效生产的有效手段。南川区块平桥背斜南区为常压页岩气,产量和井口压力相对较低,需要进一步优化生产方式。为此,通过分析平桥背斜南区30口常压页岩气井不同阶段生产特征,总结合理的生产方式。研究表明:平桥背斜南区常压页岩气井可划分为控压生产、提产携液、间歇生产、增压开采和低压低产5个生产阶段。在控压生产阶段按“保压+排液”原则,采用井下油嘴生产方式提高自喷生产周期;在提产携液阶段取出井下油嘴提产带液,防止气井积液;在间歇生产阶段采用气举、泡排等措施提高气井携液能力;在增压开采阶段采用压缩机地面增压,降低管输压力的影响;在低压低产阶段采用射流泵等低成本排水采气工艺。通过细分页岩气井生产阶段,采取合理生产方式,在平桥背斜南区常压页岩气井取得较好效果,可为盆缘复杂构造区常压页岩气开发提供借鉴。It is an effective way to realize efficient production of shale gas to adopt corresponding production mode in different production stages.The southern area of Pingqiao anticline in Nanchuan Block is a normal pressure shale gas reservoir with relatively low production and wellhead pressure,so the production mode needs to be further optimized.By analyzing the production characteristics of 30 wells in different stages in the southern area of Pingqiao,the reasonable production mode is summarized.The results show that the shale gas well can be divided into five production stages:pressure control,production increase and liquid carrying,intermittent production,pressurized production and low pressure and low production.In the stage of pressure control production,the principle of“keeping pressure+discharging liquid”is adopted to run downhole choke to improve the production cycle.The downhole choke is taken out to prevent the gas well from accumulating liquid in the stage of increasing production and carrying liquid.Measures such as gas lift,foam drainage are adopted in the intermittent production stage.Compressor is used to reduce the influence of pipeline gas transmission pressure in the pressurization stage.Low cost drainage technology such as jet pump is adopted in the stage of low pressure and low production.The mode has achieved good application effect in the south area of Pingqiao,which can provide reference for the development of normal pressure shale gas reservoir in the complex structural area of basin margin.

关 键 词：页岩气 生产特征 生产阶段 生产方式 常压 南川区块 

分 类 号：TE371[石油与天然气工程—油气田开发工程]