沁水盆地储层特征及潜在损害因素分析
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摘要
针对页岩气开发生产过程中遇到的储层损害问题,笔者从构造特征、孔渗结构、温度压力、地层水组分、层系特征等方面详细描述了沁水盆地页岩气储层特征。通过对岩样进行的TOC测试、Ro测试、扫描电镜分析、薄片鉴定、全岩分析及含气量分析,得到了储层存在潜在的水敏、速敏和酸敏损害,考虑到页岩储层渗透率低、层理和微裂缝发育丰富等特点,储层也会存在一定的固相损害和应力敏感特性,钻井过程中应注意预防这些伤害。
In view of the reservoir damage problems encountered in the development and production of shale gas,the authors described in detail the characteristics of shale gas reservoirs in Qinshui basin from aspects of structural features,pore structure,temperature and pressure,formation layer water composition,,the TOC,Ro,SEM,slice identification,whole rock analysis and gas content analysis of the rock samples,the potential water sensitivity,speed sensitivity and acid sensitivity of the reservoir are obtained. Considering the shale reservoir permeability is low,and the development of microfractures is rich,the reservoirs will also have certain solid damage and stress sensitivity characteristics. During drilling and completion,attention should be paid to prevent these damages.
In view of the reservoir damage problems encountered in the development and production of shale gas,the authors described in detail the characteristics of shale gas reservoirs in Qinshui basin from aspects of structural features,pore structure,temperature and pressure,formation layer water composition,,the TOC,Ro,SEM,slice identification,whole rock analysis and gas content analysis of the rock samples,the potential water sensitivity,speed sensitivity and acid sensitivity of the reservoir are obtained. Considering the shale reservoir permeability is low,and the development of microfractures is rich,the reservoirs will also have certain solid damage and stress sensitivity characteristics. During drilling and completion,attention should be paid to prevent these damages.
引文
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[2]林玉祥,刘虎,郭凤霞,等.沁水盆地地层剥蚀量研究[J].地质与勘探,2014(1):114-121.
[3]杨恒林,汪伟英,田中兰.煤层气储层损害机理及应对措施[J].煤炭学报,2014(增刊):158-163.
[4]秦勇,梁建设,申建,等.沁水盆地南部致密砂岩和页岩的气测显示与气藏类型[J].煤炭学报,2014(8):1559-1565.
[5]梁建设,王存武,柳迎红,等.沁水盆地致密气成藏条件与勘探潜力研究[J].天然气地球科学,2014(10):1509-1519.
[6]赵贤正,杨延辉,孙粉锦,等.沁水盆地南部高阶煤层气成藏规律与勘探开发技术[J].石油勘探与开发,2016(2):303-309.
[7]孙粉锦,王勃,李梦溪,梁宏斌.沁水盆地南部煤层气富集高产主控地质因素[J].石油学报,2014(6):1070-1079.
[8]刘星辉,刘传孝,庄帅,等.深井中砂岩力学特性的声发射信号特征分析[J].矿冶,2015,24(6):7-10.
[9]左银卿,张学英,周叡,等.沁南地区高煤阶煤储层水敏效应及其控制因素[J].油气地质与采收率,2014(5):107-110,118.
[10]白振华,李胜利,苏燕,等.琼东南盆地崖城13-1气田渐新统陵三段沉积物源综合分析[J].中国地质,2011(2):384-392.
[11]王云飞,焦华喆,王立平,等.露天转地下开采边坡变形和应力特性研究[J].矿冶,2016,25(1):5-9.
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