摘要
四川盆地中部秋林地区侏罗系中统沙溪庙组沙2段主要为三角洲平原-前缘沉积,具有明显的辫状河三角洲特点,水下分流河道砂体发育,河口坝欠发育,厚度一般较薄,气层分布存在着较强的非均质性,水平井开发难度较大。为了提高致密砂岩气藏储层钻遇成功率,提出了将三维地震资料解释成果应用到水平井地质导向的技术方法。其中,合成记录标定和精确时深转换是预测砂体埋深的有效手段,地震波形分析和地震反演是预测砂体展布的有效手段,确保了水平井井眼轨迹在砂体中穿行。实践证明,地震预测技术有效指导了水平井钻井,为川中秋林地区致密气的高效开发提供了技术保障。
Sumbmeber 2 of Middle Jurassic Shaximiao Formation in Qiulin area,central Sichuan Basin,is mainly delta plain front deposit,with obvious braided river delta characteristics.Underwater distributary channel sand bodies are developed,estuary bars are underdeveloped,and the thickness is generally thin.The gas reservoir distribution is highly heterogeneous,and horizontal well development is difficult.In order to improve the success rate of drilling tight sandstone gas reservoir,the technical method of applying 3D seismic data interpretation results to horizontal well geosteering is proposed.Among them,synthetic record calibration and accurate time depth conversion are effective means to predict the buried depth of sand bodies,and seismic waveform analysis and joint inversion are effective means to predict the distribution of sand bodies,ensuring that the trajectory of horizontal wells passes through the sand bodies.Practice has proved that seismic prediction technology effectively guides horizontal well drilling,and provides technical guarantee for efficient development of tight gas in Qiulin area in central Sichuan.
作者
何英
文健安
曾令奇
石晶穗萃
张小全
HE Ying;WEN Jian-an;ZENG Ling-qi;SHI Jing-sui-cui;ZHANG Xiao-quan(Geological Exploration and Development Research Institute of CNPC Chuanqing Drilling Engineering Co.,Ltd.,Chengdu 610051,China)
出处
《化工管理》
2023年第12期85-88,共4页
Chemical Engineering Management
关键词
致密砂岩
地震波形分析
地震反演
水平井
地质导向
dense sandstone
seismic waveform analysis
seismic inversion
horizontal well
geosteering
