摘要
苏里格气田是典型的低渗、低压、低丰度岩性气藏,气田开发中面临着实施区域井控程度低,区内储层非均质性强、分布不稳定,局部地区微构造发育等困难,实施水平井的地质风险较高。为克服以上困难,确保钻井成功,提高储层钻遇率,从如何选取对比标志进行精细地层对比出发,进而开展工区微构造、沉积及储层展布规律研究。在此基础上,应用地震含气性预测成果,以构造及沉积相为约束,利用精细地质建模、微构造预测等技术进行储层3D精细建模,对待钻地层储层展布情况、微构造起伏情况进行模拟和预测。实钻过程中,综合利用研究成果、钻井、录井、随钻测量等多种信息,对地下微构造变化进行预测及井底岩性快速识别,实时修正地质模型,为水平井及时准确调整提供充分依据。
Sulige gas field is a typical lithology-controlled gas reservoir with low permeability,low pressure,and low abundance.Development of this gas field faces varisou challenges,such as low degree of well control in drilling area,uncertainty of micro structure in some area,strong heterogeneity of reservoir and unstable sand distribution,making horizontal well drilling being highly risky.To guarantee drilling success and increase the ratio of target penetration,we first performed high-resolution stratigraphic correlation based on proper selection of marker beds,and then carried out detailed studies of the micro structure,deposition and reservoir distribution.Based on seismic prediction of gas-bearing properties and under the constraints of structure and sedimentary facies,we built a delicate 3D geologic model with fine geologic modeling technique and micro structure forecasting technology.With this model,we mapped the reservoir distribution and micro structures before drilling operation.During drilling operation,these study results can be integrated with the drilling,mud logging,MWD data to predict the change of subsurface microstructures and rapid identification of bottom hole lithology,which in turn can be used in the real-time modification of geologic model and drilling design.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2013年第3期388-393,共6页
Oil & Gas Geology
关键词
非均质性
微构造
地质建模
地质导向
水平井
苏里格气田
heterogeneity
microstructure
geologic modeling
geosteering
horizontal well
Sulige gas field
