彭页HF-1页岩气井水平段固井技术
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摘要
为了提高页岩气水平井固井质量,满足分段压裂需求,对彭水地区海相页岩气水平井固井技术进行了研究。针对彭页HF-1井固井技术难点,开展了以通井数据为基础的水平井套管下入数值模拟分析,优选了扶正器类型和扶正器安放间距,针对该井部分井段地层漏失特性,采用"应力笼"理论开展承压堵漏作业,并优选合适的高效驱油冲洗液和隔离液及水泥浆,满足界面润湿反转和驱油要求。通过数值模拟分析,设计的弹性水泥浆弹性模量6.5～8.5GPa,扶正器端面居中度达到67%,水平段固井质量能够满足压裂的需求。CBL测井结果表明,彭页HF-1井水平段固井优良率78.4%,质量合格,压裂过程未发现层间窜现象。该技术对海相页岩气井固井有一定的借鉴意义,但需要进一步研究其适应性。
In order to improve the shale gas well cementing quality and meet the demand of multi-stage fracturing,studies on marine shale gas horizontal well cementing in Pengshui Area were carried out.Based on cementing difficulties for Pengye HF-1 well,we carried out horizontal well casing data simulation analysis based on the tripping data,optimized the stabilizer type and placement space,conducted pressure sealing using the "stress cage" theory to overcome the lost circulation in this section as well as optimized mud flusher and spacer,to meet interface wettability reversal and flushing requirements.Field data showed that,through the numerical simulation analysis and by designing the elastic modulus of elasticity cement slurry to 6.5-8.5 GPa,the end centralization of centralizer reached 67%,which could effectively guarantee the cementing quality and meet the demands of fracturing.CBL logging data showed the acceptance rate of cementing in horizontal section of Pengye HF-1 Well was 78.4%,in line with quality standard,and no interlayer channeling occurred during the fracturing.The research showed that,the technique had guiding significance to cementing in marine shale formation,but adaptability of the technique must be studied further.
In order to improve the shale gas well cementing quality and meet the demand of multi-stage fracturing,studies on marine shale gas horizontal well cementing in Pengshui Area were carried out.Based on cementing difficulties for Pengye HF-1 well,we carried out horizontal well casing data simulation analysis based on the tripping data,optimized the stabilizer type and placement space,conducted pressure sealing using the "stress cage" theory to overcome the lost circulation in this section as well as optimized mud flusher and spacer,to meet interface wettability reversal and flushing requirements.Field data showed that,through the numerical simulation analysis and by designing the elastic modulus of elasticity cement slurry to 6.5-8.5 GPa,the end centralization of centralizer reached 67%,which could effectively guarantee the cementing quality and meet the demands of fracturing.CBL logging data showed the acceptance rate of cementing in horizontal section of Pengye HF-1 Well was 78.4%,in line with quality standard,and no interlayer channeling occurred during the fracturing.The research showed that,the technique had guiding significance to cementing in marine shale formation,but adaptability of the technique must be studied further.
引文
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[3]张雪芬,陆现彩,张林晔,等.页岩气的赋存形式研究及其石油地质意义[J].地球科学进展,2010,29(1):25-29.Zhang Xuefen,Lu Xiancai,Zhang Linye,et al.Occurrences of shale gas and their petroleum geological significance[J].Ad-vances in Earth Science,2010,29(1):25-29.
[4]崔思华,班凡生,袁光杰.页岩气钻完井技术现状及难点分析[J].天然气工业,2011,31(4):72-74.Cui Sihua,Ban Fansheng,Yuan Guangjie.Status quo and chal-lenges of global shale gas drilling and completion[J].Natural Gas Industry,2011,31(4):72-74.
[5]裴建忠,刘天科,周飞,等.金平1浅层大位移水平井钻井技术[J].石油钻探技术,2009,37(1):87-90.Pei Jianzhong,Liu Tianke,Zhou Fei,et al.Horizontal drilling techniques to penetrate shallow formations in Well Jinping-1[J].Petroleum Drilling Techniques,2009,37(1):87-90.
[6]冯京海,郝新朝,白亮清,等.冀东油田水平井固井技术[J].石油钻采工艺,2007,29(增刊1):32-34.Feng Jinghai,Hao Xinchao,Bai Liangqing,et al.Cementing technology of horizontal wells of Jidong Oilfield[J].Oil Drilling&Production Technology,2007,29(supplement 1):32-34.
[7]祖峰.D2-20大位移井固井技术[J].石油钻探技术,2003,31(1):47-48.Zu Feng.Cementing techniques for D2-20extended reach well[J].Petroleum Drilling Techniques,2003,31(1):47-48.
[8]王祥林,王允良,王立平,等.射孔对水泥环损伤的综合试验研究[J].地震工程与工程振动,1994,14(1):89-99.Wang Xianglin,Wang Yunliang,Wang Liping,et al.Synthetic experimental research on the damage to the concrete circle dur-ing the hole shooting[J].Earthquake Engineering and Engi-neering Vibration,1994,14(1):89-99.
[9]李维,李黔.大位移水平井下套管漂浮接箍安放位置优化分析[J].石油钻探技术,2009,37(3):53-56.Li Wei,Li Qian.Optimization of float collar position in extend-ed reach wells[J].Petroleum Drilling Techniques,2009,37(3):53-56.
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