Baojing Area Longmaxi Shale Geological Modeling And Resource Evaluation

In this paper,Shenhua Huabao Jing Longmaxi shale gas blocks are focused on,analyzing the work area by logging data,seismic data and core experiment al data,depth study of mineral composition of shale gas,geochemical,pore stru cture,physical properties and characteristics of gas,including gas main factors,a three-dimensional geological model is established,dividing the region and fav orable and predicting the shale gas resources.Thesis research show Baojing shale gas Mine Area has complex structure,t he strata was highly weathered,and part Longmaxi shale exposed at the surface,and currently erosion and weathering is serious,forming weathered zone.The distribution of fracture in the research area is complex.The southeastern part of work area has more fracture,while syncline and slopes are more stable.Baojin g favorable horizon for Longmaxi shale gas is Longyi zone.Core experiment s hows a high organic matter content of the paragraph,about 2.5%~3.3%,Contain ing gas is preferably,total gas content is 2.7~3.0m3/t,and it is the region's hig h-quality shale.The favorable sedimentary micro-faces of Baojing shale gas Min e Area is mud deep water shelf micro faces,which is located in north-west of the work area.Longmaxi shale gas favorable area of the work area can be divi ded into two categories,Class I favorable area is located in the northwest of th e left-wing obliquely,the area is about 104km2.Class II favorable area is locate d in the southeast of the right-wing obliquely,the area is about 109km2.The res ource calculation using the probability volume method shows that in Baojing Ar ea class I favorable area P50 resources is 228.3×108m3,class II favorable area P50 resources is 239.6×108m3,sum is 467.9×108m3.The resource calculation us ing The three-dimensional geological model approach shows that in Baojing Are a class I favorable area P50 resources is 228.3×108m3,class II favorable area P50 resources is 239.6×108m3,sum is 467.9×108m3,wherein the adsorbed gas is 266.29×108m3,the free gas is 252.55×108m3.