摘要
渝西地区黄202深层页岩气区块目的层埋深超过3000m,以水平井开发为主。为提高气藏采收率,确保水平井井位部署合理,保证水平井段箱体钻遇率,亟需开展“甜点”精细预测与微构造三维空间的落实研究。构造模型揭示地质构造的几何形态和拓扑关系,成为多学科沟通协作的重要桥梁,而水平井参与对三维构造建模技术提出了更高的要求。目的层龙马溪组层系很薄,单靠地震和直井资料建立地层构造模型容易出现层面交叉、地层缺失等现象,降低了构造模型的精度。针对研究区特点,利用基于地质导向的水平井地质分层与对比技术,虚拟井构建与分层计算技术,综合直井段、水平井段、虚拟井与地震等多信息,联合开展目的层精细构造建模,经后续钻井验证吻合程度高,取得了较好的预测效果。
The target layer of the Huang 202 deep shale gas block in western Chongqing,with a burial depth of more than 3000m,has mainly been developed by horizontal wells.Fine“sweet spot”prediction and threedimensional spatial determination of microstructures should be conducted as soon as possible to improve gas reservoir recovery,guarantee proper horizontal well placement,and ensure the box drilling rate of horizontal sections.Structural models reveal the geometric shapes and topological relationships of geological structures and thus serve as an important bridge for multidisciplinary communication and cooperation.However,the participation of horizontal wells puts forward higher requirements on 3D structural modeling technology.As the strata of the Longmaxi Formation,i.e.,the target layer,is thin,structural modeling of the strata solely with seismic data and vertical well data is prone to cross-bedding and missing strata,which reduces the accuracy of the structural model.According to the characteristics of the study area,this paper presents joint fine structural modeling of the target layer by employing the geosteering-based geological layering and comparison technology for horizontal wells,the construction and layered calculation technology for pseudo wells,integrating multiple information on the vertical section,the horizontal section,the pseudo well,and seismic data.Subsequent drilling for verification is highly consistent with the modeling results,representing a favorable prediction effect achieved by the proposed method.
作者
张婷婷
李洪革
赵文涛
张胜
蔡银涛
郑建雄
ZHANG Tingting;LI Hongge;ZHAO Wentao;ZHANG Sheng;CAI Yintao;ZHENG Jianxiong(Geological Research Center,GRI,BGP Inc.,CNPC,Zhuozhou,Hebei 072751,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2022年第S02期175-178,233,共5页
Oil Geophysical Prospecting
基金
中国石油天然气集团公司重大工程技术现场试验项目“横波震源三维地震勘探技术现场试验”(2020F-40)资助
关键词
构造建模
水平井
页岩气
structural modeling
horizontal well
shale gas
