东海M构造中深层低渗气藏"甜点"预测技术OA北大核心CSTPCD

In recent years,structural-lithological complex reservoirs have gradually become the key in reservoir expansion and production in the East China Sea.The low permeability gas reservoir in the middle and deep low-permeability gas reservoir in the M Structure of the East China Sea was studied.The study area has large burial depth,strong internal heterogeneity,and complex porosity-permeability relationship,but little difference in geo-physical response characteristics.It is urgent to study the fine characterization of sweet spot reservoir in the reser-voir.Seismic rock physics were analyzed,in which the Young's impedance was used to distinguish clastic rock reservoir from non-reservoir.By classifying and optimizing parameters in seismological profiling,shear modulus was found and used as a comprehensive sensitive elastic factor,and combined with a high sensitivity hydrocarbon detection factor,clear clean,coarse-grained,and high-permeability high quality reservoirs could be detected.In addition,to reduce the influence of rock skeleton porosity,a highly sensitive fluid factor was used to detect hydro-carbons.Finally,combined with lithology and attributes of hydrocarbon detection,good sweet spot reservoir areas were finely characterized.Results show that the sweet spot prediction using this method reached a high successful prediction rate of 86.07%,which provided an important basis for well deployment and trajectory optimization and a reference for working on similar blocks.