Moxi Structure Xujiahe Gas Reservoirs Geological Evaluation And Target Selection

In the paper, through analyzing the lithology and lithofacies; the description of structure characteristics; the reservoir and fracture basic character research; the description of gas&water distribution and log response character; the reservoir accumulation type and trap character, using geology, well-logging and geophysics to carry out synthetic research and evaluation , it suggests the favoring exploration targets and well goals at T₃x⁴ and T₃x² subformations of T₃x formation of Moxi structure, it has laid the foundation for the exploration and develop of T₃x reservoir of Moxi structure next step. The main cognition and results are:① The reservoirs of T₃x⁴ and T₃x² subformations of Moxi structure are popularly developed , it provides fairly good foundations for the oil&gas enriched to be a trap; The reservoir type is mainly fracture-porosity, and secondly is porosity reservoir, the reservoir accumulation type is much complicated, and the heterogeneous is so strong that the prediction is much difficult.② The double-sideways resistivity differentia and the deep-sideway resistivity absolute value ways are much efficient research techniques to recognize the gas&water well-logging, in the paper researched and established gas&water synthetic recognition standards first time laid the foundation for those application popularly that gas&water logging recognition of lower-resistivity reservoir at the T₃x formations of central Sichuan basin, it is no doubt that it will guide the gas&water recognition and oil-testing of T₃x formations.③ T₃x⁴ and T₃x² subformations are highly water saturation traps, the gas&water distribution law are really much complicated. T₃x⁴ subformation has an character of "gas being upper, water being bottom" vertically in all, but T₃x² subformation has no such laws, at the platform, T₃x⁴ subformation gas...